Magnesium hydride has attracted great attention because of its high theoretical capacity and outstanding reversibility, nevertheless, its practical applications have been restricted by the disadvantages of the sluggis...Magnesium hydride has attracted great attention because of its high theoretical capacity and outstanding reversibility, nevertheless, its practical applications have been restricted by the disadvantages of the sluggish kinetics and high thermodynamic stability. In this work, an unexpected high reversible hydrogen capacity over 8.0 wt% has been achieved from MgH2 metal hydride composited with small amounts of LiBH4 and Li3AlH6 complex hydrides, which begins to release hydrogen at 276 ℃ and then completely dehydrogenates at 360 ℃. The dehydrogenated MgH2+LiBH4/Li3AlH6 composite can fully reabsorb hydrogen below 300 ℃ with an excellent cycling stability. The composite exhibits a significant reduction of dehydrogenation activation energy from 279.7 kJ/mol(primitive MgH2) to 139.3 kJ/mol(MgH2+LiBH4/Li3AlH6),as well as a remarkable reduction of dehydrogenation enthalpy change from 75.1 k J/mol H2(primitive MgH2) to 62.8 kJ/mol H2(MgH2+LiBH4/Li3AlH6). The additives of LiBH4 and Li3AlH6 not only enhance the cycling hydrogen capacity, but also simultaneously improve the reversible de/rehydrogenation kinetics, as well as the dehydrogenation thermodynamics. This notable improvement on the hydrogen absorption/desorption behaviors of the MgH2+LiBH4/Li3AlH6 composite could be attributed to the dehydrogenated products including Li3Mg7, Mg17Al12 and MgAlB4, which play a key role on reducing the dehydrogenation activation energy and increasing diffusion rate of hydrogen. Meanwhile, the LiBH4 and Li3AlH6 effectively destabilize MgH2 with a remarkable reduction on dehydrogenation enthalpy change in terms of thermodynamics. In particular, the Li3Mg7, Mg17Al12 and MgAlB4 phases can reversibly transform into MgH2, Li3AlH6 and LiBH4 after rehydrogenation, which contribute to maintain a high cycling capacity.This constructing strategy can further promote the development of high reversible capacity Mg-based materials with suitable de/rehydrogenation properties.展开更多
Biomass-derived carbon materials for lithiumion batteries emerge as one of the most promising anodes from sustainable perspective.However,improving the reversible capacity and cycling performance remains a long-standi...Biomass-derived carbon materials for lithiumion batteries emerge as one of the most promising anodes from sustainable perspective.However,improving the reversible capacity and cycling performance remains a long-standing challenge.By combining the benefits of K2CO_(3) activation and KMnO_(4) hydrothermal treatment,this work proposes a two-step activation method to load MnO_(2) charge transfer onto biomass-derived carbon(KAC@MnO_(2)).Comprehensive analysis reveals that KAC@MnO_(2) has a micro-mesoporous coexistence structure and uniform surface distribution of MnO_(2),thus providing an improved electrochemical performance.Specifically,KAC@MnO_(2) exhibits an initial chargedischarge capacity of 847.3/1813.2 mAh·g^(-1) at 0.2 A·g^(-1),which is significantly higher than that of direct pyrolysis carbon and K2CO_(3) activated carbon,respectively.Furthermore,the KAC@MnO_(2) maintains a reversible capacity of 652.6 mAh·g^(-1) after 100 cycles.Even at a high current density of 1.0 A·g^(-1),KAC@MnO_(2) still exhibits excellent long-term cycling stability and maintains a stable reversible capacity of 306.7 mAh·g^(-1) after 500 cycles.Compared with reported biochar anode materials,the KAC@MnO_(2) prepared in this work shows superior reversible capacity and cycling performance.Additionally,the Li+insertion and de-insertion mechanisms are verified by ex situ X-ray diffraction analysis during the chargedischarge process,helping us better understand the energy storage mechanism of KAC@MnO_(2).展开更多
Hard carbon(HC)is widely used in sodium-ion batteries(SIBs),but its performance has always been limited by lowinitial Coulombic efficiency(ICE)and cycling stability.Cathode compensation agent is a favorable strategy t...Hard carbon(HC)is widely used in sodium-ion batteries(SIBs),but its performance has always been limited by lowinitial Coulombic efficiency(ICE)and cycling stability.Cathode compensation agent is a favorable strategy to make up for the loss of active sodium ions consumed byHCanode.Yet it lacks agent that effectively decomposes to increase the active sodium ions as well as regulate carbon defects for decreasing the irreversible sodium ions consumption.Here,we propose 1,2-dihydroxybenzene Na salt(NaDB)as a cathode compensation agent with high specific capacity(347.9 mAh g^(-1)),lower desodiation potential(2.4–2.8 V)and high utilization(99%).Meanwhile,its byproduct could functionalize HC with more C=O groups and promote its reversible capacity.Consequently,the presodiation hard carbon(pHC)anode exhibits highly reversible capacity of 204.7 mAh g^(-1) with 98%retention at 5 C rate over 1000 cycles.Moreover,with 5 wt%NaDB initially coated on the Na3V2(PO4)3(NVP)cathode,the capacity retention of NVP + NaDB|HC cell could increase from 22%to 89%after 1000 cycles at 1 C rate.This work provides a new avenue to improve reversible capacity and cycling performance of SIBs through designing functional cathode compensation agent.展开更多
MgH_(2),as one of the typical solid-state hydrogen storage materials,has attracted extensive attention.However,the slow kinetics and poor cycle stability limit its application.In this work,LiBH_(4) and YNi_(5) alloy w...MgH_(2),as one of the typical solid-state hydrogen storage materials,has attracted extensive attention.However,the slow kinetics and poor cycle stability limit its application.In this work,LiBH_(4) and YNi_(5) alloy were co-added as additives to MgH_(2) via ball milling,thereby realizing an excellent dehydrogenation per-formance and good cycle stability at 300 ℃.The MgH_(2)-0.04LiBH_(4)-0.01YNi_(5) composite can release 7 wt.%of hydrogen in around 10 min at 300 ℃ and still have a reversible hydrogen storage capacity of 6.42 wt.%after 110 cycles,with a capacity retention rate as high as 90.3%based on the second dehydrogenation capacity.The FTIR results show that LiBH_(4) can reversibly absorb and desorb hydrogen throughout the hydrogen ab/desorption process,which contributes a portion of the reversible hydrogen storage capacity to the MgH_(2)-0.04LiBH_(4)-0.01YNi_(5) composite.Due to the small amount of LiBH_(4) and YNi_(5),the dehydro-genation activation energy of MgH_(2) did not decrease significantly,nor did the dehydrogenation enthalpy(△H)change.However,the MgNi3B2 and in-situ formed YH3 during the hydrogen absorption/desorption cycles is not only beneficial to the improvement of the kinetics performance for MgH_(2) but also improves its cycle stability.This work provides a straightforward method for developing high reversible hydrogen capacity on Mg-based hydrogen storage materials with moderate kinetic performance.展开更多
On account of the high theoretical capacity, high corrosion resistance, environmental benignity, abundant availability and low cost, the research on a-Fe_2O_3 has been gradually fastened on as promising anodes materia...On account of the high theoretical capacity, high corrosion resistance, environmental benignity, abundant availability and low cost, the research on a-Fe_2O_3 has been gradually fastened on as promising anodes materials toward lithium-ion batteries(LIBs). A high-performance anode for LIBs based on α-Fe_2O_3 nanoplates have been selectively prepared. The α-Fe_2O_3 nanoplates can be synthesized with iron ionbased ionic liquid as iron source and template. The α-Fe_2O_3 nanoplates as the anode of LIBs can display high capacity of around1950 mAh g^(-1) at 0.5 A g^(-1) which have exceeded the theoretical capacity of α-Fe_2O_3. On account of unique nanoplate structures and gum arabic as binder, the α-Fe_2O_3 nanoplates also exhibit high rate capability and excellent cycling performance.展开更多
The raw carbon nanotubes (CNTs) prepared by chemical vapor deposition (CVD) were used in electrochemical lithiation. To remove the impurity the mild oxidation was done on the samples. The electrochemical characteristi...The raw carbon nanotubes (CNTs) prepared by chemical vapor deposition (CVD) were used in electrochemical lithiation. To remove the impurity the mild oxidation was done on the samples. The electrochemical characteristics of the two samples are investigated by the galvanostatic charge-discharge measurements and cyclic voltammetry. The structural and interfacial changes of the CNTs electrode were analyzed by XRD and FT-IR. The samples show a reversibility of lithium intercalation and de-intercalation. The reversible capacities of the first five cycles are larger than 300 mAh/g and the irreversible capacity of the first cycle was much larger than that mentioned in literatures. There is no identical change in the structure during the charge and discharge. The reactions at the interface between electrode and the electrolyte are similar to those of other carbonaceous materials.展开更多
Sodium-ion batteries(SIBs)are expected to offer affordability and high energy density for large-scale energy storage system.However,the commercial application of SIBs is hurdled by low initial coulombic efficiency(ICE...Sodium-ion batteries(SIBs)are expected to offer affordability and high energy density for large-scale energy storage system.However,the commercial application of SIBs is hurdled by low initial coulombic efficiency(ICE),continuous Na loss during long-term operation,and low sodium-content of cathode materials.In this scenario,presodiation strategy by introducing an external sodium reservoir has been rationally proposed,which could supplement additional sodium ions into the system and thereby markedly improve both the cycling performance and energy density of SIBs.In this review,the significance of presodiation is initially introduced,followed by comprehensive interpretation on technological properties,underlying principles,and associated approaches,as well as our perspectives on present inferiorities and future research directions.Overall,this contribution outlines a distinct pathway towards the presodiation methodology,of significance but still in its nascent phase,which may inspire the targeted guidelines to explore new chemistry in this field.展开更多
Fe（3–x）O4 raspberry shaped nanostructures/graphene nanocomposites were synthesized by a one-step polyol-solvothermal method to be tested as electrode materials for Li-ion battery（LIB）. Indeed, Fe（3–x）O4 raspbe...Fe（3–x）O4 raspberry shaped nanostructures/graphene nanocomposites were synthesized by a one-step polyol-solvothermal method to be tested as electrode materials for Li-ion battery（LIB）. Indeed, Fe（3–x）O4 raspberry shaped nanostructures consist of original oriented aggregates of Fe（3–x）O4 magnetite nanocrystals, ensuring a low oxidation state of magnetite and a hollow and porous structure, which has been easily combined with graphene sheets. The resulting nanocomposite powder displays a very homogeneous spatial distribution of Fe（3–x）O4 nanostructures at the surface of the graphene sheets. These original nanostructures and their strong interaction with the graphene sheets resulted in very small capacity fading upon Li＋ion intercalation. Reversible capacity, as high as 660 m Ah/g, makes this material promising for anode in Li-ion batteries application.展开更多
Storage of hydrogen in solid-state materials offers a safer and compacter way compared to compressed and liquid hydrogen.Vanadium(V)-based alloys attract wide attention,owing to the total hydrogen storage capacity of ...Storage of hydrogen in solid-state materials offers a safer and compacter way compared to compressed and liquid hydrogen.Vanadium(V)-based alloys attract wide attention,owing to the total hydrogen storage capacity of 3.8 wt% and reversible capacity above 2.0 wt%at ambient conditions,surpassing the AB_(5)-,AB_(2)-and ABtype hydrogen storage alloys.However,several challenges,such as insufficient capacity,cyclic stability and high raw material costs,hinder the practical applications of V-based alloys.This review provides an overview of the recent advances in hydrogen storage properties of V-based alloys.The mechanism and optimization strategies of hydrogen storage properties and cyclic stability are discussed in detail,and furthermore,the approaches to reduce manufacturing costs are compared comprehensively.展开更多
Compared with conventional graphite anode,hard carbons have the potential to make reversible lithium storage below 0 V accessible due to the formation of dendrites is slow.However,under certain conditions of high curr...Compared with conventional graphite anode,hard carbons have the potential to make reversible lithium storage below 0 V accessible due to the formation of dendrites is slow.However,under certain conditions of high currents and lithiation depths,the irreversible plated lithium occurs and then results in the capacity losses.Herein,we systematically explore the true reversibility of hard carbon anodes below 0 V.We identify the lithiation boundary parameters that control the reversible capacity of hard carbon anodes.When the boundary capacity is controlled below 400 mAh g−1 with current density below 50 mA g−1,no lithium dendrites are observed during the lithiation process.Compared with the discharge cut-off voltage to 0 V,this boundary provides a nearly twice reversible capacity with the capacity retention of 80%after 172 cycles.The results of characterization and finite element model reveal that the large reversible capacity below 0 V of hard carbon anodes is mainly benefited from the dual effect of lithium intercalation and reversible lithium film.After the lithium intercalation,the over-lithiation induces the quick growth of lithium dendrites,worsening the electrochemical irreversibility.This work enables insights of the potentially low-voltage performance of hard carbons in lithium-ion batteries.展开更多
Magnesium-ion batteries are considered as a potential candidate to replace lithium-ion batteries owing to their advantages such as high theoretical capacity,high natural abundance and favorable safety.However,the expl...Magnesium-ion batteries are considered as a potential candidate to replace lithium-ion batteries owing to their advantages such as high theoretical capacity,high natural abundance and favorable safety.However,the exploitation of desirable cathode materials suffers from sluggish Mg^(2+)intercalation kinetics,resulting in poor specific capacity and terrible rate capability.Herein,an in situ polyaniline-intercalation strategy is developed to enlarge the interlayer distance of V_(6)O_(13),thus boosting the Mg^(2+)intercalation kinetics.More critically,the strong coulombic interaction between divalent Mg^(2+)and anions in the host materials is another key factor hindering the Mg^(2+)diffusion kinetics,which can be effectively weakened by theπ-conjugated structure of the polyaniline molecule.Reflected in magnesium-ion batteries,polyanilineintercalated V_(6)O_(13)exhibits high reversible capacity,superior rate capability and outstanding cycling stability.Such a novel strategy can also be utilized widely in other layered structure materials,which opens up a new avenue for exploiting desirable multivalent-ion battery cathode materials.展开更多
MoS_(2)/Ti_(3)C_(2)T_(x)composite was synthesized by a facile one-step hydrothermal method without further annealing process.When tested as anode material for sodium-ion batteries,it exhibited a high reversible capaci...MoS_(2)/Ti_(3)C_(2)T_(x)composite was synthesized by a facile one-step hydrothermal method without further annealing process.When tested as anode material for sodium-ion batteries,it exhibited a high reversible capacity of 331 mA h g^(−1)at 100 mA g^(−1)after 70 cycles with only 0.058%decay per cycle.When tested as anode material for lithium-ion batteries,it exhibited a reversible capacity of 614.4 mA h g^(−1)at 100 mA g^(−1)after 70 cycles with only 0.05%decay per cycle.Moreover,compared with pristine MoS_(2)and pure Ti_(3)C_(2)T_(x),the composite had better rate performance and faster ion diffusion kinetics,which might be caused by the as-prepared composite material having relatively rough surface,more active sites and more convenient diffusion paths.展开更多
Tungsten disulfide(WS_(2))presents a layered structure with a high theoretical capacity(433 mA h g^(-1))in potassium-ion batteries,making it a promising anode material.However,its kinetics is poor with limited practic...Tungsten disulfide(WS_(2))presents a layered structure with a high theoretical capacity(433 mA h g^(-1))in potassium-ion batteries,making it a promising anode material.However,its kinetics is poor with limited practical capacity and it is still a challenge to design new structures to improve its kinetics.In this work,a hollow Cu_(9)S_(5)/C/WS_(2)composite structure is designed.It is used as an anode in potassium-ion batteries(PIBs)with a high reversible capacity(406 mA h g^(-1)after 150 cycles at 200 mA g^(-1))and excellent rate performance(246 mA h g^(-1)at 20 A g^(-1)).These results are attributed to its unique hollow composite structure,where the WS_(2)sheets are pinned on hollow cubic carbon by Cu_(9)S_(5)nanowires.On one hand,the introduction of Cu_(9)S_(5)nanowires expands the layer spacing of WS_(2)and forms a K^(+)fast diffusion channel.On the other hand,hollow carbon and Cu_(9)S_(5)nanowires form a fast electron transmission path,which improves the charge transport rate.Additionally,the use of hollow carbon and Cu_(9)S_(5)nanowires as a framework enhances structural stability.The synergistic effect of these aspects finally realizes fast and stable K^(+)storage.This work provides a new insight into the design of high-performance potassium storage devices using layered metal sulfides.展开更多
Hard carbon(HC)is an attractive anode for sodium-ion batteries(SIBs),but its practical application has been hindered by low reversible capacity and initial coulombic efficiency(ICE).In this study,we propose a CO_(2)-a...Hard carbon(HC)is an attractive anode for sodium-ion batteries(SIBs),but its practical application has been hindered by low reversible capacity and initial coulombic efficiency(ICE).In this study,we propose a CO_(2)-assisted carbonization strategy based on a tunable phenolic resin as the precursor.The carbonization process can be governed by a two-step process,CO_(2)-induced pore opening followed by carbon skeletal reorganization,promoting the formation of well-controlled closed micropores and improved surface chemistry.Structural and electrochemical characterization studies further demonstrate that such modification greatly enhances sodium storage performance.The optimized HC anode exhibited a high initial capacity of 305.8 mAh g^(−1) and an ICE of 95.6%at 30 mA g^(−1).These values are much higher than those for the traditional control(230.9 mAh g^(−1),86.16%).After 500 cycles at 1 A g^(−1),it also retained 90.02% of its capacity.This work provides an efficient and controllable route for designing high-performance SIB anodes and offering new application potential of phenolic resin-based carbons in sustainable electrochemical energy storage.展开更多
We report high-performance aqueous Zn-ion batteries consisting of a zinc anode,a poly(benzoquinonyl sulfide)(PBQS)cathode,and a 3 M Zn(CF_(3)SO_(3))_(2)aqueous electrolyte.The PBQS cathode displays an initial discharg...We report high-performance aqueous Zn-ion batteries consisting of a zinc anode,a poly(benzoquinonyl sulfide)(PBQS)cathode,and a 3 M Zn(CF_(3)SO_(3))_(2)aqueous electrolyte.The PBQS cathode displays an initial discharge capacity of 203 mA h g^(−1)at 0.1C and a good capacity retention of 86%after 50 cycles at 0.2C.The PBQS cathode can deliver a high reversible capacity of 126 mA h g^(−1)at a high rate of 5.0C.Meanwhile,we also studied the redox mechanism during discharge/charge processes by ex situ infrared spectra and theoretical calculations,revealing that reversible bonding of Zn^(2+)ions with carbonyl oxygen atoms in PBQS occurs in the redox reactions of PBQS molecules.The redox reactions of PBQS molecules can be regarded as the reversible bonding of Zn^(2+)ions with carbonyl oxygen atoms in PBQS.展开更多
The development of high-energy-density Na-ion batteries(SIBs)is hindered by the lack of a high-capacity anode with fast Na-ion reaction kinetics due to the large Na^(+)radius and slow Na^(+)diffusion kinetics.Herein,a...The development of high-energy-density Na-ion batteries(SIBs)is hindered by the lack of a high-capacity anode with fast Na-ion reaction kinetics due to the large Na^(+)radius and slow Na^(+)diffusion kinetics.Herein,a high specific capacity anode is designed by constructing a double vanadium-based compound(VS_(4)–V_(2)CT_(x))heterostructure composite.The strong rivet structure bridged according to the S–V–C bonding interaction between VS_(4) and V_(2)CT_(x) unblocks the three-dimensional channel of electron transport and synergistically promotes ion diffusion and charge transport.In addition,the electrochemical reaction kinetics can be enhanced by adjusting the ratio of the vanadium valence state to facilitate electrocatalytic activity at the VS_(4)–V_(2)CT_(x) heterojunction interface.When used as a SIB anode,the VS_(4)–V_(2)CT_(x) composite exhibits excellent ultra-long cycling performance,with a specific discharge capacity of 322 mA h g^(−1) after 4000 cycles at a large current density of 10 A g^(−1).All-vanadium SIBs(Na_(3)V_(2)(PO_(4))_(3)@C//VS_(4)–V_(2)CT_(x))are also assembled and showed excellent sodium storage performance with a high reversible capacity of 234 mA h g^(−1) at 3 A g^(−1),indicating broad application prospects for vanadium-based sodium storage devices.展开更多
A sponge network-shaped Mn_(3)O_(4) material is synthesized by a one-pot metal organic framework-combustion(MOF-C)technique for Li-ion battery anodes with improved performance.The as-synthesized ordered sponge network...A sponge network-shaped Mn_(3)O_(4) material is synthesized by a one-pot metal organic framework-combustion(MOF-C)technique for Li-ion battery anodes with improved performance.The as-synthesized ordered sponge network morphology is characterized by various techniques,such as powder X-ray diffraction,scanning electron microscopy,transmission electron microscopy,Raman spectroscopy,X-ray photoelectron spectroscopy,and N_(2) adsorption–desorption measurements.The one-pot synthesized Mn_(3)O_(4) material shows a uniform amorphous graphitic carbon coating with few-nanometer thickness on the surface.This anode shows an initial discharge capacity of 1186 mA h g^(−1) and a reversible capacity of 768 mA h g^(−1) is maintained at an applied current density of 200 mA g^(−1) after 100 cycles.Sustained reversible capacities of 651 and 592 mA h g^(−1) are measured for the other two different current densities of 500 and 700 mA g^(−1),respectively,after 120 cycles,demonstrating the high stability of the anode.This unique morphology appears to contribute to the significantly high rate performance,as observed from the retained reversible capacity of 155 mA h g^(−1) at a very high current density of 10000 mA g^(−1),which is maintained for the next two subsequent sequences with a notable recovered capacity of 700 mA h g^(−1) for an intermediate current density of 400 mA g^(−1) after 175 cycles.展开更多
As a new anode material for sodium-ion batteries(SIBs),VS_(4)shows impressive energy storage potential due to its unique one-dimensional parallel chain structure,large chain spacing and high sulfur content.Here,poplar...As a new anode material for sodium-ion batteries(SIBs),VS_(4)shows impressive energy storage potential due to its unique one-dimensional parallel chain structure,large chain spacing and high sulfur content.Here,poplar flower-like nitrogen-doped carbon nanotube@VS_(4)composites(NCNt@VS_(4))with a three-dimensional structure were successfully synthesized via a solvothermal reaction using nitrogen-doped carbon nanotube(NCNt)as a template.The unique three-dimensional structure can enhance the transmission of electrons and sodium ions,conducive to wetting of the electrolyte and buffering the huge volume change.Therefore,NCNt@VS_(4)delivers excellent sodium storage performance.It presents a reversible capacity of 430 mA h g^(-1)after 2000 cycles at 1 A g^(-1),and demonstrates a high initial coulombic efficiency(81.6%).At the same time,the electrode exhibits superior rate-performance(460 mA h g^(-1)at 5 A g^(-1))and high ability to tolerate current changes.This work develops a reliable method for the preparation of other 3D NCNt@transition metal sulfide composites,which exhibit great potential as an anode for SIBs.展开更多
Sodium-ion batteries(SIBs)represent a promising next-generation energy storage technology,yet their commercialization is impeded by low initial Coulombic efficiency,which severely limits energy density.This issue stem...Sodium-ion batteries(SIBs)represent a promising next-generation energy storage technology,yet their commercialization is impeded by low initial Coulombic efficiency,which severely limits energy density.This issue stems from irreversible sodium consumption during cycling,primarily caused by solid electrolyte interphase(SEI)formation and parasitic side reactions.Such sodium loss not only reduces energy output but also accelerates electrode degradation,thereby shortening cycle life.Pre-sodiation has emerged as an essential strategy to mitigate these challenges by introducing an external sodium source to compensate for irreversible sodium loss,thereby improving both energy density and long-term cyclability.However,developing efficient,scalable,and economically viable pre-sodiation methods remains a critical hurdle.This review is motivated by the urgent need to systematize and evaluate emerging pre-sodiation strategies specifically for hard carbon anodes—a leading candidate in SIB applications—and to provide strategic guidance for future research.We comprehensively summarize and analyze both conventional and novel pre-sodiation methods,correlating their mechanisms with the fundamental sources of sodium loss.Furthermore,we compare the practicality and scalability of recent advances,identify key technical barriers,and propose a holistic framework combining complementary sodium supplementation and storage approaches.Finally,we offer forward-looking perspectives on the development of industrially applicable pre-sodiation techniques,underscoring their vital role in achieving high-energy-density and long-life sodium-ion batteries.展开更多
Rechargeable lithium-ion batteries(LIBs)have attracted great attention in various applications.However,high energy density is still a challenge for next-generation lithium ion batteries.Therefore,searching for novel e...Rechargeable lithium-ion batteries(LIBs)have attracted great attention in various applications.However,high energy density is still a challenge for next-generation lithium ion batteries.Therefore,searching for novel electrode materials to address this issue is highly desirable.In this report,we employed a surfactant-thermal method to prepare a novel 1D crystalline thioantimonate[NH(CH_(3))_(2)][Sb_(4)S_(5)(S_(3))].After grinding for 10 min using a mortar,[NH(CH_(3))_(2)][Sb_(4)S_(5)(S_(3))]presented an ultrathin nanosheet morphology(around 20 nm in thickness and several micrometers in lateral dimension).Employed as an anode material for lithium ion batteries,the nano-sized crystalline thioantimonate shows a high reversible specific capacity of 568 mA h g^(−1)over 50 cycles at a current density of 0.1 A g^(−1)and an excellent rate capability of 301 mA h g^(−1)at a current density of 5 A g^(−1).Our research suggests that crystalline thioantimonate could have great potential applications in high performance Li-ion batteries.展开更多
基金the financial supports for this research from the National Basic Research Program of China(2019YFB1505103)the National Natural Science Foundation of China(51571179 and 51671173)the Open Fund of the Guangdong Provincial Key Laboratory of Advance Energy Storage Materials。
文摘Magnesium hydride has attracted great attention because of its high theoretical capacity and outstanding reversibility, nevertheless, its practical applications have been restricted by the disadvantages of the sluggish kinetics and high thermodynamic stability. In this work, an unexpected high reversible hydrogen capacity over 8.0 wt% has been achieved from MgH2 metal hydride composited with small amounts of LiBH4 and Li3AlH6 complex hydrides, which begins to release hydrogen at 276 ℃ and then completely dehydrogenates at 360 ℃. The dehydrogenated MgH2+LiBH4/Li3AlH6 composite can fully reabsorb hydrogen below 300 ℃ with an excellent cycling stability. The composite exhibits a significant reduction of dehydrogenation activation energy from 279.7 kJ/mol(primitive MgH2) to 139.3 kJ/mol(MgH2+LiBH4/Li3AlH6),as well as a remarkable reduction of dehydrogenation enthalpy change from 75.1 k J/mol H2(primitive MgH2) to 62.8 kJ/mol H2(MgH2+LiBH4/Li3AlH6). The additives of LiBH4 and Li3AlH6 not only enhance the cycling hydrogen capacity, but also simultaneously improve the reversible de/rehydrogenation kinetics, as well as the dehydrogenation thermodynamics. This notable improvement on the hydrogen absorption/desorption behaviors of the MgH2+LiBH4/Li3AlH6 composite could be attributed to the dehydrogenated products including Li3Mg7, Mg17Al12 and MgAlB4, which play a key role on reducing the dehydrogenation activation energy and increasing diffusion rate of hydrogen. Meanwhile, the LiBH4 and Li3AlH6 effectively destabilize MgH2 with a remarkable reduction on dehydrogenation enthalpy change in terms of thermodynamics. In particular, the Li3Mg7, Mg17Al12 and MgAlB4 phases can reversibly transform into MgH2, Li3AlH6 and LiBH4 after rehydrogenation, which contribute to maintain a high cycling capacity.This constructing strategy can further promote the development of high reversible capacity Mg-based materials with suitable de/rehydrogenation properties.
基金supported by the National Natural Science Foundation of China(Grant No.22078278)Hunan Innovative Talent Project(Grant No.2022RC1111)+1 种基金the Key project of Hunan Provincial Education Department(Grant No.22A0131)the State Key Laboratory of Clean Energy Utilization(Open Fund Project No.ZJUCEU2021009).
文摘Biomass-derived carbon materials for lithiumion batteries emerge as one of the most promising anodes from sustainable perspective.However,improving the reversible capacity and cycling performance remains a long-standing challenge.By combining the benefits of K2CO_(3) activation and KMnO_(4) hydrothermal treatment,this work proposes a two-step activation method to load MnO_(2) charge transfer onto biomass-derived carbon(KAC@MnO_(2)).Comprehensive analysis reveals that KAC@MnO_(2) has a micro-mesoporous coexistence structure and uniform surface distribution of MnO_(2),thus providing an improved electrochemical performance.Specifically,KAC@MnO_(2) exhibits an initial chargedischarge capacity of 847.3/1813.2 mAh·g^(-1) at 0.2 A·g^(-1),which is significantly higher than that of direct pyrolysis carbon and K2CO_(3) activated carbon,respectively.Furthermore,the KAC@MnO_(2) maintains a reversible capacity of 652.6 mAh·g^(-1) after 100 cycles.Even at a high current density of 1.0 A·g^(-1),KAC@MnO_(2) still exhibits excellent long-term cycling stability and maintains a stable reversible capacity of 306.7 mAh·g^(-1) after 500 cycles.Compared with reported biochar anode materials,the KAC@MnO_(2) prepared in this work shows superior reversible capacity and cycling performance.Additionally,the Li+insertion and de-insertion mechanisms are verified by ex situ X-ray diffraction analysis during the chargedischarge process,helping us better understand the energy storage mechanism of KAC@MnO_(2).
基金supported by National Natural Science Foundation of China(No.22278308 and 22109114)Open Foundation of Shanghai Jiao Tong University Shaoxing Research Institute of Renewable Energy and Molecular Engineering(Grant number:JDSX2022023).
文摘Hard carbon(HC)is widely used in sodium-ion batteries(SIBs),but its performance has always been limited by lowinitial Coulombic efficiency(ICE)and cycling stability.Cathode compensation agent is a favorable strategy to make up for the loss of active sodium ions consumed byHCanode.Yet it lacks agent that effectively decomposes to increase the active sodium ions as well as regulate carbon defects for decreasing the irreversible sodium ions consumption.Here,we propose 1,2-dihydroxybenzene Na salt(NaDB)as a cathode compensation agent with high specific capacity(347.9 mAh g^(-1)),lower desodiation potential(2.4–2.8 V)and high utilization(99%).Meanwhile,its byproduct could functionalize HC with more C=O groups and promote its reversible capacity.Consequently,the presodiation hard carbon(pHC)anode exhibits highly reversible capacity of 204.7 mAh g^(-1) with 98%retention at 5 C rate over 1000 cycles.Moreover,with 5 wt%NaDB initially coated on the Na3V2(PO4)3(NVP)cathode,the capacity retention of NVP + NaDB|HC cell could increase from 22%to 89%after 1000 cycles at 1 C rate.This work provides a new avenue to improve reversible capacity and cycling performance of SIBs through designing functional cathode compensation agent.
基金National Natural Science Foundation of China(Nos.52271213 and 52271221).
文摘MgH_(2),as one of the typical solid-state hydrogen storage materials,has attracted extensive attention.However,the slow kinetics and poor cycle stability limit its application.In this work,LiBH_(4) and YNi_(5) alloy were co-added as additives to MgH_(2) via ball milling,thereby realizing an excellent dehydrogenation per-formance and good cycle stability at 300 ℃.The MgH_(2)-0.04LiBH_(4)-0.01YNi_(5) composite can release 7 wt.%of hydrogen in around 10 min at 300 ℃ and still have a reversible hydrogen storage capacity of 6.42 wt.%after 110 cycles,with a capacity retention rate as high as 90.3%based on the second dehydrogenation capacity.The FTIR results show that LiBH_(4) can reversibly absorb and desorb hydrogen throughout the hydrogen ab/desorption process,which contributes a portion of the reversible hydrogen storage capacity to the MgH_(2)-0.04LiBH_(4)-0.01YNi_(5) composite.Due to the small amount of LiBH_(4) and YNi_(5),the dehydro-genation activation energy of MgH_(2) did not decrease significantly,nor did the dehydrogenation enthalpy(△H)change.However,the MgNi3B2 and in-situ formed YH3 during the hydrogen absorption/desorption cycles is not only beneficial to the improvement of the kinetics performance for MgH_(2) but also improves its cycle stability.This work provides a straightforward method for developing high reversible hydrogen capacity on Mg-based hydrogen storage materials with moderate kinetic performance.
基金financially supported by the National Natural Science Foundation of China (No.21506081,21506077)Jiangsu University Scientific Research Funding (15JDG048)+1 种基金Chinese Postdoctoral Foundation (2016M590420)Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions
文摘On account of the high theoretical capacity, high corrosion resistance, environmental benignity, abundant availability and low cost, the research on a-Fe_2O_3 has been gradually fastened on as promising anodes materials toward lithium-ion batteries(LIBs). A high-performance anode for LIBs based on α-Fe_2O_3 nanoplates have been selectively prepared. The α-Fe_2O_3 nanoplates can be synthesized with iron ionbased ionic liquid as iron source and template. The α-Fe_2O_3 nanoplates as the anode of LIBs can display high capacity of around1950 mAh g^(-1) at 0.5 A g^(-1) which have exceeded the theoretical capacity of α-Fe_2O_3. On account of unique nanoplate structures and gum arabic as binder, the α-Fe_2O_3 nanoplates also exhibit high rate capability and excellent cycling performance.
文摘The raw carbon nanotubes (CNTs) prepared by chemical vapor deposition (CVD) were used in electrochemical lithiation. To remove the impurity the mild oxidation was done on the samples. The electrochemical characteristics of the two samples are investigated by the galvanostatic charge-discharge measurements and cyclic voltammetry. The structural and interfacial changes of the CNTs electrode were analyzed by XRD and FT-IR. The samples show a reversibility of lithium intercalation and de-intercalation. The reversible capacities of the first five cycles are larger than 300 mAh/g and the irreversible capacity of the first cycle was much larger than that mentioned in literatures. There is no identical change in the structure during the charge and discharge. The reactions at the interface between electrode and the electrolyte are similar to those of other carbonaceous materials.
基金the financial support from the National Nature Science Foundation of China(No.U20A20249)the National Key Research and Development Program of China(2021YFB3800300)the Shenzhen Science and Technology Innovation Commission(KCXST20221021111216037)。
文摘Sodium-ion batteries(SIBs)are expected to offer affordability and high energy density for large-scale energy storage system.However,the commercial application of SIBs is hurdled by low initial coulombic efficiency(ICE),continuous Na loss during long-term operation,and low sodium-content of cathode materials.In this scenario,presodiation strategy by introducing an external sodium reservoir has been rationally proposed,which could supplement additional sodium ions into the system and thereby markedly improve both the cycling performance and energy density of SIBs.In this review,the significance of presodiation is initially introduced,followed by comprehensive interpretation on technological properties,underlying principles,and associated approaches,as well as our perspectives on present inferiorities and future research directions.Overall,this contribution outlines a distinct pathway towards the presodiation methodology,of significance but still in its nascent phase,which may inspire the targeted guidelines to explore new chemistry in this field.
基金supported by the funding from the European Research Council(ERCAdvanced Grant,ERC-2011-AdG,Project 291543-IONACES)+2 种基金the Materials Institute Carnot Alsace(MICA)from the Direction Générale de l’Armement(DGA)French-German Research Institute of Saint-Louis(ISL)
文摘Fe（3–x）O4 raspberry shaped nanostructures/graphene nanocomposites were synthesized by a one-step polyol-solvothermal method to be tested as electrode materials for Li-ion battery（LIB）. Indeed, Fe（3–x）O4 raspberry shaped nanostructures consist of original oriented aggregates of Fe（3–x）O4 magnetite nanocrystals, ensuring a low oxidation state of magnetite and a hollow and porous structure, which has been easily combined with graphene sheets. The resulting nanocomposite powder displays a very homogeneous spatial distribution of Fe（3–x）O4 nanostructures at the surface of the graphene sheets. These original nanostructures and their strong interaction with the graphene sheets resulted in very small capacity fading upon Li＋ion intercalation. Reversible capacity, as high as 660 m Ah/g, makes this material promising for anode in Li-ion batteries application.
基金financially supported by the National Key Research and Development Program of China (No.2022YFB 3 803700)the National Natural Science Foundation of China and the China Academy of Engineering Physics (NSAF)(Nos.U2130208 and 52171205)+1 种基金Sichuan Science and Technology Program(No.PG-PGFT-JFKF23-000009-0)Sichuan Science and Technology Program (No.2021JDJQ0020)。
文摘Storage of hydrogen in solid-state materials offers a safer and compacter way compared to compressed and liquid hydrogen.Vanadium(V)-based alloys attract wide attention,owing to the total hydrogen storage capacity of 3.8 wt% and reversible capacity above 2.0 wt%at ambient conditions,surpassing the AB_(5)-,AB_(2)-and ABtype hydrogen storage alloys.However,several challenges,such as insufficient capacity,cyclic stability and high raw material costs,hinder the practical applications of V-based alloys.This review provides an overview of the recent advances in hydrogen storage properties of V-based alloys.The mechanism and optimization strategies of hydrogen storage properties and cyclic stability are discussed in detail,and furthermore,the approaches to reduce manufacturing costs are compared comprehensively.
基金This work gratefully acknowledges the support of National Key Research and Development(R&D)Program of China(grant No.2020YFB1505800)National Science Foundation for Excellent Young Scholars of China(grant No.2192285)+2 种基金the Youth Innovation Promotion Association of CAS(grant No.2019178)Research and Development Project of Key Core and Common Technology of Shanxi Province(grant No.2020xxx014)Key Research and Development(R&D)Projects of Shanxi Province(grant No.202102040201003).
文摘Compared with conventional graphite anode,hard carbons have the potential to make reversible lithium storage below 0 V accessible due to the formation of dendrites is slow.However,under certain conditions of high currents and lithiation depths,the irreversible plated lithium occurs and then results in the capacity losses.Herein,we systematically explore the true reversibility of hard carbon anodes below 0 V.We identify the lithiation boundary parameters that control the reversible capacity of hard carbon anodes.When the boundary capacity is controlled below 400 mAh g−1 with current density below 50 mA g−1,no lithium dendrites are observed during the lithiation process.Compared with the discharge cut-off voltage to 0 V,this boundary provides a nearly twice reversible capacity with the capacity retention of 80%after 172 cycles.The results of characterization and finite element model reveal that the large reversible capacity below 0 V of hard carbon anodes is mainly benefited from the dual effect of lithium intercalation and reversible lithium film.After the lithium intercalation,the over-lithiation induces the quick growth of lithium dendrites,worsening the electrochemical irreversibility.This work enables insights of the potentially low-voltage performance of hard carbons in lithium-ion batteries.
基金supported by the Scientific Research Starting Foundation of Huaqiao University(No.21BS115)Natural Science Foundation of Xiamen,China(No.3502Z20206008)+1 种基金Foundation of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering(No.BK20200702)Youth Innovation Project of Natural Science Foundation of Fujian Province(No.2019J05091).
文摘Magnesium-ion batteries are considered as a potential candidate to replace lithium-ion batteries owing to their advantages such as high theoretical capacity,high natural abundance and favorable safety.However,the exploitation of desirable cathode materials suffers from sluggish Mg^(2+)intercalation kinetics,resulting in poor specific capacity and terrible rate capability.Herein,an in situ polyaniline-intercalation strategy is developed to enlarge the interlayer distance of V_(6)O_(13),thus boosting the Mg^(2+)intercalation kinetics.More critically,the strong coulombic interaction between divalent Mg^(2+)and anions in the host materials is another key factor hindering the Mg^(2+)diffusion kinetics,which can be effectively weakened by theπ-conjugated structure of the polyaniline molecule.Reflected in magnesium-ion batteries,polyanilineintercalated V_(6)O_(13)exhibits high reversible capacity,superior rate capability and outstanding cycling stability.Such a novel strategy can also be utilized widely in other layered structure materials,which opens up a new avenue for exploiting desirable multivalent-ion battery cathode materials.
基金supported by grants from the National Natural Science Foundation of China(No.21773188)Fundamental Research Funds for the Central Universities(XDJK2017A002,XDJK2017B048)Program for Innovation Team Building at Institutions of Higher Education in Chongqing(CXTDX201601011).
文摘MoS_(2)/Ti_(3)C_(2)T_(x)composite was synthesized by a facile one-step hydrothermal method without further annealing process.When tested as anode material for sodium-ion batteries,it exhibited a high reversible capacity of 331 mA h g^(−1)at 100 mA g^(−1)after 70 cycles with only 0.058%decay per cycle.When tested as anode material for lithium-ion batteries,it exhibited a reversible capacity of 614.4 mA h g^(−1)at 100 mA g^(−1)after 70 cycles with only 0.05%decay per cycle.Moreover,compared with pristine MoS_(2)and pure Ti_(3)C_(2)T_(x),the composite had better rate performance and faster ion diffusion kinetics,which might be caused by the as-prepared composite material having relatively rough surface,more active sites and more convenient diffusion paths.
基金National Natural Science Foundation of China(52073166,52172049,U22A20144)Key Program for International S&T Cooperation Projects of Shaanxi Province(2023GHZD-08)+3 种基金Special program of local service from Education Department of Shaanxi Province(22JC017)Natural Science Foundation of Shaanxi Province(2023-JC-YB-302)Natural Science Basic Research Program of Shaanxi(2022JQ-373)Three Reforms–Comprehensive Pilot(2023GXLH-073)。
文摘Tungsten disulfide(WS_(2))presents a layered structure with a high theoretical capacity(433 mA h g^(-1))in potassium-ion batteries,making it a promising anode material.However,its kinetics is poor with limited practical capacity and it is still a challenge to design new structures to improve its kinetics.In this work,a hollow Cu_(9)S_(5)/C/WS_(2)composite structure is designed.It is used as an anode in potassium-ion batteries(PIBs)with a high reversible capacity(406 mA h g^(-1)after 150 cycles at 200 mA g^(-1))and excellent rate performance(246 mA h g^(-1)at 20 A g^(-1)).These results are attributed to its unique hollow composite structure,where the WS_(2)sheets are pinned on hollow cubic carbon by Cu_(9)S_(5)nanowires.On one hand,the introduction of Cu_(9)S_(5)nanowires expands the layer spacing of WS_(2)and forms a K^(+)fast diffusion channel.On the other hand,hollow carbon and Cu_(9)S_(5)nanowires form a fast electron transmission path,which improves the charge transport rate.Additionally,the use of hollow carbon and Cu_(9)S_(5)nanowires as a framework enhances structural stability.The synergistic effect of these aspects finally realizes fast and stable K^(+)storage.This work provides a new insight into the design of high-performance potassium storage devices using layered metal sulfides.
基金supported by the National Natural Science Foundation of China(22478328 and 21671166)the Key R&D Program of Xinjiang Uygur Autonomous Region(Grant No.2024B01009 and 2024B01009-1)+1 种基金the Autonomous Region Resource Sharing Platform Construction Science and Technology Program Project(PT2407)the Tianshan Talents Science and Technology Innovation Team of the Xinjiang Uygur Autonomous Region(2024TSYCTD0002).
文摘Hard carbon(HC)is an attractive anode for sodium-ion batteries(SIBs),but its practical application has been hindered by low reversible capacity and initial coulombic efficiency(ICE).In this study,we propose a CO_(2)-assisted carbonization strategy based on a tunable phenolic resin as the precursor.The carbonization process can be governed by a two-step process,CO_(2)-induced pore opening followed by carbon skeletal reorganization,promoting the formation of well-controlled closed micropores and improved surface chemistry.Structural and electrochemical characterization studies further demonstrate that such modification greatly enhances sodium storage performance.The optimized HC anode exhibited a high initial capacity of 305.8 mAh g^(−1) and an ICE of 95.6%at 30 mA g^(−1).These values are much higher than those for the traditional control(230.9 mAh g^(−1),86.16%).After 500 cycles at 1 A g^(−1),it also retained 90.02% of its capacity.This work provides an efficient and controllable route for designing high-performance SIB anodes and offering new application potential of phenolic resin-based carbons in sustainable electrochemical energy storage.
基金supported by the Projects of MOST(2017YFA0206700)the NSFC(21673243)+1 种基金the MOE 111(B12015)Tianjin Key(no.16PTSYJC00030).
文摘We report high-performance aqueous Zn-ion batteries consisting of a zinc anode,a poly(benzoquinonyl sulfide)(PBQS)cathode,and a 3 M Zn(CF_(3)SO_(3))_(2)aqueous electrolyte.The PBQS cathode displays an initial discharge capacity of 203 mA h g^(−1)at 0.1C and a good capacity retention of 86%after 50 cycles at 0.2C.The PBQS cathode can deliver a high reversible capacity of 126 mA h g^(−1)at a high rate of 5.0C.Meanwhile,we also studied the redox mechanism during discharge/charge processes by ex situ infrared spectra and theoretical calculations,revealing that reversible bonding of Zn^(2+)ions with carbonyl oxygen atoms in PBQS occurs in the redox reactions of PBQS molecules.The redox reactions of PBQS molecules can be regarded as the reversible bonding of Zn^(2+)ions with carbonyl oxygen atoms in PBQS.
基金supported by the National Natural Science Foundation of China(Grant No.52072322,51604250)the Sichuan Science and Technology Program(No.2022YFG0294,2019-GH02-00052-HZ).
文摘The development of high-energy-density Na-ion batteries(SIBs)is hindered by the lack of a high-capacity anode with fast Na-ion reaction kinetics due to the large Na^(+)radius and slow Na^(+)diffusion kinetics.Herein,a high specific capacity anode is designed by constructing a double vanadium-based compound(VS_(4)–V_(2)CT_(x))heterostructure composite.The strong rivet structure bridged according to the S–V–C bonding interaction between VS_(4) and V_(2)CT_(x) unblocks the three-dimensional channel of electron transport and synergistically promotes ion diffusion and charge transport.In addition,the electrochemical reaction kinetics can be enhanced by adjusting the ratio of the vanadium valence state to facilitate electrocatalytic activity at the VS_(4)–V_(2)CT_(x) heterojunction interface.When used as a SIB anode,the VS_(4)–V_(2)CT_(x) composite exhibits excellent ultra-long cycling performance,with a specific discharge capacity of 322 mA h g^(−1) after 4000 cycles at a large current density of 10 A g^(−1).All-vanadium SIBs(Na_(3)V_(2)(PO_(4))_(3)@C//VS_(4)–V_(2)CT_(x))are also assembled and showed excellent sodium storage performance with a high reversible capacity of 234 mA h g^(−1) at 3 A g^(−1),indicating broad application prospects for vanadium-based sodium storage devices.
基金supported by the National Research Foundation of Korea(NRF)grant funded by the Korean government(MSIP)(2014R1A2A1A10050821)supported by the Global Frontier Program through the Global Frontier Hybrid Interface Materials(GFHIM)of the National Research Foundation of Korea(NRF)funded by the Ministry of Science,ICT&Future Planning(2013M3A6B1078875)or(2013-073298).
文摘A sponge network-shaped Mn_(3)O_(4) material is synthesized by a one-pot metal organic framework-combustion(MOF-C)technique for Li-ion battery anodes with improved performance.The as-synthesized ordered sponge network morphology is characterized by various techniques,such as powder X-ray diffraction,scanning electron microscopy,transmission electron microscopy,Raman spectroscopy,X-ray photoelectron spectroscopy,and N_(2) adsorption–desorption measurements.The one-pot synthesized Mn_(3)O_(4) material shows a uniform amorphous graphitic carbon coating with few-nanometer thickness on the surface.This anode shows an initial discharge capacity of 1186 mA h g^(−1) and a reversible capacity of 768 mA h g^(−1) is maintained at an applied current density of 200 mA g^(−1) after 100 cycles.Sustained reversible capacities of 651 and 592 mA h g^(−1) are measured for the other two different current densities of 500 and 700 mA g^(−1),respectively,after 120 cycles,demonstrating the high stability of the anode.This unique morphology appears to contribute to the significantly high rate performance,as observed from the retained reversible capacity of 155 mA h g^(−1) at a very high current density of 10000 mA g^(−1),which is maintained for the next two subsequent sequences with a notable recovered capacity of 700 mA h g^(−1) for an intermediate current density of 400 mA g^(−1) after 175 cycles.
基金Natural Science Foundation of Shandong Province(Grant No.ZR2018MEM012)Youth Innovation and Technology Support Plan of Shandong Province(No.2019KJA006)Qilu University of Technology International Cooperation Fund(QLUTGJHZ2018025)。
文摘As a new anode material for sodium-ion batteries(SIBs),VS_(4)shows impressive energy storage potential due to its unique one-dimensional parallel chain structure,large chain spacing and high sulfur content.Here,poplar flower-like nitrogen-doped carbon nanotube@VS_(4)composites(NCNt@VS_(4))with a three-dimensional structure were successfully synthesized via a solvothermal reaction using nitrogen-doped carbon nanotube(NCNt)as a template.The unique three-dimensional structure can enhance the transmission of electrons and sodium ions,conducive to wetting of the electrolyte and buffering the huge volume change.Therefore,NCNt@VS_(4)delivers excellent sodium storage performance.It presents a reversible capacity of 430 mA h g^(-1)after 2000 cycles at 1 A g^(-1),and demonstrates a high initial coulombic efficiency(81.6%).At the same time,the electrode exhibits superior rate-performance(460 mA h g^(-1)at 5 A g^(-1))and high ability to tolerate current changes.This work develops a reliable method for the preparation of other 3D NCNt@transition metal sulfide composites,which exhibit great potential as an anode for SIBs.
基金Key Research and Development Program of Shandong Province(2023CXPT069)National Key Research and Development Program of China(2023YFF0616500)+3 种基金National Natural Science Foundation of China(22279026,2247090373,22509044,22479036)China Postdoctoral Science Foundation(2024M764198,2025T181148)Major Science and Technology Projects for Independent Innovation of China FAW Group Co.,Ltd.(20240301002ZD)Fundamental Research Funds for the Central Universities(XNJKKGYDJ2024015)。
文摘Sodium-ion batteries(SIBs)represent a promising next-generation energy storage technology,yet their commercialization is impeded by low initial Coulombic efficiency,which severely limits energy density.This issue stems from irreversible sodium consumption during cycling,primarily caused by solid electrolyte interphase(SEI)formation and parasitic side reactions.Such sodium loss not only reduces energy output but also accelerates electrode degradation,thereby shortening cycle life.Pre-sodiation has emerged as an essential strategy to mitigate these challenges by introducing an external sodium source to compensate for irreversible sodium loss,thereby improving both energy density and long-term cyclability.However,developing efficient,scalable,and economically viable pre-sodiation methods remains a critical hurdle.This review is motivated by the urgent need to systematize and evaluate emerging pre-sodiation strategies specifically for hard carbon anodes—a leading candidate in SIB applications—and to provide strategic guidance for future research.We comprehensively summarize and analyze both conventional and novel pre-sodiation methods,correlating their mechanisms with the fundamental sources of sodium loss.Furthermore,we compare the practicality and scalability of recent advances,identify key technical barriers,and propose a holistic framework combining complementary sodium supplementation and storage approaches.Finally,we offer forward-looking perspectives on the development of industrially applicable pre-sodiation techniques,underscoring their vital role in achieving high-energy-density and long-life sodium-ion batteries.
基金financial support from AcRF Tier 1(RG 13/15 and RG133/14)Tier 2(ARC 20/12 and ARC 2/13)from MOE+1 种基金the CREATE program(Nanomaterials for Energy and Water Management)from NRF,Singaporesupport from Open Project of State Key Laboratory of Supramolecular Structure and Materials(Grant number:sklssm2015027),Jilin University,China.
文摘Rechargeable lithium-ion batteries(LIBs)have attracted great attention in various applications.However,high energy density is still a challenge for next-generation lithium ion batteries.Therefore,searching for novel electrode materials to address this issue is highly desirable.In this report,we employed a surfactant-thermal method to prepare a novel 1D crystalline thioantimonate[NH(CH_(3))_(2)][Sb_(4)S_(5)(S_(3))].After grinding for 10 min using a mortar,[NH(CH_(3))_(2)][Sb_(4)S_(5)(S_(3))]presented an ultrathin nanosheet morphology(around 20 nm in thickness and several micrometers in lateral dimension).Employed as an anode material for lithium ion batteries,the nano-sized crystalline thioantimonate shows a high reversible specific capacity of 568 mA h g^(−1)over 50 cycles at a current density of 0.1 A g^(−1)and an excellent rate capability of 301 mA h g^(−1)at a current density of 5 A g^(−1).Our research suggests that crystalline thioantimonate could have great potential applications in high performance Li-ion batteries.
