Solid-state electrolyte(SSE)of the sodium-ion battery have attracted tremendous attention in the next generation energy storage materials on account of their wide electrochemical window and thermal stability.However,t...Solid-state electrolyte(SSE)of the sodium-ion battery have attracted tremendous attention in the next generation energy storage materials on account of their wide electrochemical window and thermal stability.However,the high interfacial impedance,low ion transference number and complex preparation process restrict the application of SSE.Herein,inspired by the excellent sieving function and high specific surface area of red blood cells,we obtained a solid-like electrolyte(SLE)based on the combination of the pancake-like metal-organic framework(MOF)with liquid electrolyte,possessing a high ionic conductivity of 6.60×10^(-4) S cm^(−1),and excellent sodium metal compatibility.In addition,we investigated the ion restriction effect of MOF’s apertures size and special functional groups,and the ion transference number increased from 0.16 to 0.33.Finally,the assembled Na_(0.44)MnO_(2)//SLE//Na full batteries showed no obvious capacity decrease after 160 cycles.This material design of SLE in our work is an important key to obtain fast ion migration SLE for high-performance sodium-ion batteries.展开更多
Li-rich layered oxides(LRLOs)materials have been considered as one of the most promising cathode materials for next-generation lithium-ion batteries.However,LRLOs suffer from continuous phase transition from the layer...Li-rich layered oxides(LRLOs)materials have been considered as one of the most promising cathode materials for next-generation lithium-ion batteries.However,LRLOs suffer from continuous phase transition from the layered to rock-salt phase during cycling,and its origin still remains unclear.Here,we reveal that the accumulation of rock-salt phases originates from the compressive strain induced by phase transitions in which the initial surface rock-salt phase compresses its neighboring layered phase and further causes lattice contraction of the layered phase.This compressed layered phase always existed on the particle surface,leading to the rocksalt phase not completely covering the surface of the LRLOs particles.Also,the compressed layered phase can serve as an oxygen loss channel to lure the generation of more rock-salt phase,resulting in the phase transition gradually extending inwards.Based on this finding,we construct a uniform coherent spinel structure as a surface protection layer to suppress oxygen loss and the interior extension of rock-salt phase during cycling.As a result,the improved cathode materials demonstrate 99%voltage retention after 100 cycles.This work solves the surface inhomogeneous phase evolution of LRLOs,contributing to enhanced sustainability of high energy density cathode materials.展开更多
Sodium-ion batteries(SIBs)exhibit significant potential for large-scale energy storage systems due to the abundance and low cost of sodium resources.Triggering lattice oxygen redox(LOR)in P2-type transition metal oxid...Sodium-ion batteries(SIBs)exhibit significant potential for large-scale energy storage systems due to the abundance and low cost of sodium resources.Triggering lattice oxygen redox(LOR)in P2-type transition metal oxides is considered a promising approach to enhance energy density in SIB cathodes,providing high operating potential and substantial capacity.However,irreversible phase transitions associated with LOR,particularly from prisms(P-type stacking)to octahedrons(O-type stacking),lead to severe structural distortions and sluggish Na+diffusion kinetics.In this work,an Al-substitution strategy is proposed to suppress the formation of O-type stacking and instead promote the formation of a beneficial Z phase.The flexible Al-O bonds accommodate asymmetric variations in their occupied states during the sodiation process,mitigating local structural distortions through Al-O bond contraction.Stabilization of the local structure ensures the maintenance of a robust Na+diffusion pathway.As a result,the Al-substituted cathode achieves a low Na+diffusion barrier of 0.47 eV and delivers a capacity of 86 mAh/g even at a high current density of 1 A/g within 1.5–4.5 V,maintaining 62.5%capacity retention over 100 cycles.展开更多
Correction to:Electrochemical Energy Reviews(2023)6:35 https://doi.org/10.1007/s41918-023-00199-1 The publication of this article unfortunately contained mis-takes.The assignment of one affiliation to the authors Oleg...Correction to:Electrochemical Energy Reviews(2023)6:35 https://doi.org/10.1007/s41918-023-00199-1 The publication of this article unfortunately contained mis-takes.The assignment of one affiliation to the authors Oleg Borodin was not correct.The corrected aassignment is given below.The original article has been corrected.展开更多
The undesired side reactions at electrode/electrolyte interface as well as the irreversible phase evolution during electrochemical cycling significantly affect the cyclic performances of nickel-rich NMCs electrode mat...The undesired side reactions at electrode/electrolyte interface as well as the irreversible phase evolution during electrochemical cycling significantly affect the cyclic performances of nickel-rich NMCs electrode materials.Electrolyte optimization is an effective approach to suppress such an adverse side reaction,thereby enhancing the electrochemical properties.Herein,a novel boron-based film forming additive,tris(2,2,2-trifluoroethyl)borate(TTFEB),has been introduced to regulate the interphasial chemistry of LiNi0.8Mn0.1Co0.1O2(NMC811)cathode to improve its long-term cyclability and rate properties.The results of multi-model diagnostic study reveal that formation lithium fluoride(LiF)-rich and boron(B)containing cathode electrolyte interphase(CEI)not only stabilizes cathode surface,but also prevents electrolyte decomposition.Moreover,homogenously distributed B containing species serves as a skeleton to form more uniform and denser CEI,reducing the interphasial resistance.Remarkably,the Li/NMC811 cell with the TTFEB additive delivers an exceptional cycling stability with a high-capacity retention of 72.8%after 350 electrochemical cycles at a 1 C current rate,which is significantly higher than that of the cell cycled in the conventional electrolyte(59.7%).These findings provide a feasible pathway for improving the electrochemical performance of Ni-rich NMCs cathode by regulating the interphasial chemistry.展开更多
The conventional perspective suggests that low-concentration electrolytes(LCEs)face challenges in achieving stable charge/discharge properties due to the decreased ionic conductivity resulting from lower Li^(+) concen...The conventional perspective suggests that low-concentration electrolytes(LCEs)face challenges in achieving stable charge/discharge properties due to the decreased ionic conductivity resulting from lower Li^(+) concentrations.However,the successful utilization of LCEs in lithium/sodium-ion batteries has brought them into the forefront of consideration for high performance battery systems.It is possible to achieve improved interface stability and ion transport performance for LCEs through adjusting electrolyte components,such as salts,solvents,and additives.This review provides timely update of the recent research progress,design strategies and remaining challenges of LCEs to answer several questions:i)What is the key factor for designing LCEs?ii)How to balance the low salt concentration and good ionic conductivity?iii)What is the interphasial mechanism of anode/cathode in LCEs?Firstly,the development of LCEs is discussed with typical examples.Subsequently,effectiveness of solvents on overall performances of LCEs is comprehensively summarized in detail.Finally,the challenges and possible research direction of LCEs are discussed.This review provides critical guidance for designing novel electrolytes for secondary batteries.展开更多
基金the National Natural Science Foundation of China(51802239)the National Key Research and Development Program of China(2020YFA0715000,2019YFA0704902)+3 种基金Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory(XHT2020-005,XHT2020-003)the Natural Science Foundation of Hubei Province(2019CFA001)the Fundamental Research Funds for the Central Universities(2020III011GX,2020IVB057,2019IVB054,2019III062JL)and National Innovation and Entrepreneurship Training Program for College Students(202010497080).
文摘Solid-state electrolyte(SSE)of the sodium-ion battery have attracted tremendous attention in the next generation energy storage materials on account of their wide electrochemical window and thermal stability.However,the high interfacial impedance,low ion transference number and complex preparation process restrict the application of SSE.Herein,inspired by the excellent sieving function and high specific surface area of red blood cells,we obtained a solid-like electrolyte(SLE)based on the combination of the pancake-like metal-organic framework(MOF)with liquid electrolyte,possessing a high ionic conductivity of 6.60×10^(-4) S cm^(−1),and excellent sodium metal compatibility.In addition,we investigated the ion restriction effect of MOF’s apertures size and special functional groups,and the ion transference number increased from 0.16 to 0.33.Finally,the assembled Na_(0.44)MnO_(2)//SLE//Na full batteries showed no obvious capacity decrease after 160 cycles.This material design of SLE in our work is an important key to obtain fast ion migration SLE for high-performance sodium-ion batteries.
基金supported by the Natural Science Foundation of Tianjin(grant nos.24JCJQJC00220 and 24ZXZSSS00390)the National Natural Science Foundation of China(grant nos.22479080,22121005,92372203,and 92372001)+1 种基金the Open Foundation of Shanghai Jiao Tong University Shaoxing Research Institute of Renewable Energy and Molecular Engineering(grant no.JDSX2023003)the Fundamental Research Funds for the Central Universities of Nankai University(grant nos.63241206 and 9242000710).
文摘Li-rich layered oxides(LRLOs)materials have been considered as one of the most promising cathode materials for next-generation lithium-ion batteries.However,LRLOs suffer from continuous phase transition from the layered to rock-salt phase during cycling,and its origin still remains unclear.Here,we reveal that the accumulation of rock-salt phases originates from the compressive strain induced by phase transitions in which the initial surface rock-salt phase compresses its neighboring layered phase and further causes lattice contraction of the layered phase.This compressed layered phase always existed on the particle surface,leading to the rocksalt phase not completely covering the surface of the LRLOs particles.Also,the compressed layered phase can serve as an oxygen loss channel to lure the generation of more rock-salt phase,resulting in the phase transition gradually extending inwards.Based on this finding,we construct a uniform coherent spinel structure as a surface protection layer to suppress oxygen loss and the interior extension of rock-salt phase during cycling.As a result,the improved cathode materials demonstrate 99%voltage retention after 100 cycles.This work solves the surface inhomogeneous phase evolution of LRLOs,contributing to enhanced sustainability of high energy density cathode materials.
基金supported by the National Natural Science Foundation of China(Grant No.22209106)This research used beamline 7-BM of the NSLS II,a US DOE Office of Science user facility operated for the DOE Office of Science by Brookhaven National Laboratory under contract No.DE-SC0012704.
文摘Sodium-ion batteries(SIBs)exhibit significant potential for large-scale energy storage systems due to the abundance and low cost of sodium resources.Triggering lattice oxygen redox(LOR)in P2-type transition metal oxides is considered a promising approach to enhance energy density in SIB cathodes,providing high operating potential and substantial capacity.However,irreversible phase transitions associated with LOR,particularly from prisms(P-type stacking)to octahedrons(O-type stacking),lead to severe structural distortions and sluggish Na+diffusion kinetics.In this work,an Al-substitution strategy is proposed to suppress the formation of O-type stacking and instead promote the formation of a beneficial Z phase.The flexible Al-O bonds accommodate asymmetric variations in their occupied states during the sodiation process,mitigating local structural distortions through Al-O bond contraction.Stabilization of the local structure ensures the maintenance of a robust Na+diffusion pathway.As a result,the Al-substituted cathode achieves a low Na+diffusion barrier of 0.47 eV and delivers a capacity of 86 mAh/g even at a high current density of 1 A/g within 1.5–4.5 V,maintaining 62.5%capacity retention over 100 cycles.
文摘Correction to:Electrochemical Energy Reviews(2023)6:35 https://doi.org/10.1007/s41918-023-00199-1 The publication of this article unfortunately contained mis-takes.The assignment of one affiliation to the authors Oleg Borodin was not correct.The corrected aassignment is given below.The original article has been corrected.
基金supported by the National Natural Science Foundation of China(Grant No.22209106).
文摘The undesired side reactions at electrode/electrolyte interface as well as the irreversible phase evolution during electrochemical cycling significantly affect the cyclic performances of nickel-rich NMCs electrode materials.Electrolyte optimization is an effective approach to suppress such an adverse side reaction,thereby enhancing the electrochemical properties.Herein,a novel boron-based film forming additive,tris(2,2,2-trifluoroethyl)borate(TTFEB),has been introduced to regulate the interphasial chemistry of LiNi0.8Mn0.1Co0.1O2(NMC811)cathode to improve its long-term cyclability and rate properties.The results of multi-model diagnostic study reveal that formation lithium fluoride(LiF)-rich and boron(B)containing cathode electrolyte interphase(CEI)not only stabilizes cathode surface,but also prevents electrolyte decomposition.Moreover,homogenously distributed B containing species serves as a skeleton to form more uniform and denser CEI,reducing the interphasial resistance.Remarkably,the Li/NMC811 cell with the TTFEB additive delivers an exceptional cycling stability with a high-capacity retention of 72.8%after 350 electrochemical cycles at a 1 C current rate,which is significantly higher than that of the cell cycled in the conventional electrolyte(59.7%).These findings provide a feasible pathway for improving the electrochemical performance of Ni-rich NMCs cathode by regulating the interphasial chemistry.
基金financially supported by the National Natural Science Foundation of China(No.22209106)Shanghai Pujiang Program(21PJ1408700)+1 种基金the National Key Research and Development Program of China(2022YFB2402300)supported by the Assistant Secretary for Energy Efficiency and Renewable Energy(EERE),Vehicle Technology Office(VTO)of the US Department of Energy(DOE)through the Advanced Battery Materials Research(BMR)Program under contract no.DE-SC0012704.
文摘The conventional perspective suggests that low-concentration electrolytes(LCEs)face challenges in achieving stable charge/discharge properties due to the decreased ionic conductivity resulting from lower Li^(+) concentrations.However,the successful utilization of LCEs in lithium/sodium-ion batteries has brought them into the forefront of consideration for high performance battery systems.It is possible to achieve improved interface stability and ion transport performance for LCEs through adjusting electrolyte components,such as salts,solvents,and additives.This review provides timely update of the recent research progress,design strategies and remaining challenges of LCEs to answer several questions:i)What is the key factor for designing LCEs?ii)How to balance the low salt concentration and good ionic conductivity?iii)What is the interphasial mechanism of anode/cathode in LCEs?Firstly,the development of LCEs is discussed with typical examples.Subsequently,effectiveness of solvents on overall performances of LCEs is comprehensively summarized in detail.Finally,the challenges and possible research direction of LCEs are discussed.This review provides critical guidance for designing novel electrolytes for secondary batteries.
