The rapid surge in global energy consumption stems from escalating electricity demand and sustained economic growth.This underscores the urgent need for efficient,environmentally benign energy storage and conversion t...The rapid surge in global energy consumption stems from escalating electricity demand and sustained economic growth.This underscores the urgent need for efficient,environmentally benign energy storage and conversion technologies.Among various earth-abundant metal-based batteries,magnesium-ion batteries(MIBs)have garnered increasing attention as promising candidates for next-generation green energy systems.展开更多
Compared with the extensively used ester‐based electrolyte,the hard carbon(HC)electrode is more compatible with the ether‐based counterpart in sodium‐ion batteries,which can lead to improved cycling stability and r...Compared with the extensively used ester‐based electrolyte,the hard carbon(HC)electrode is more compatible with the ether‐based counterpart in sodium‐ion batteries,which can lead to improved cycling stability and robust rate capability.However,the impact of salt anion on the electrochemical performance of HC electrodes has yet to be fully understood.In this study,the anionic chemistry in regulating the stability of electrolytes and the performance of sodium‐ion batteries have been systematically investigated.This work shows discrepancies in the reductive stability of the anionic group,redox kinetics,and component/structure of solid electrolyte interface(SEI)with different salts(NaBF_(4),NaPF_(6),and NaSO_(3)CF_(3))in the typical ether solvent(diglyme).Particularly,the density functional theory calculation manifests the preferred decomposition of PF_(6)−due to the reduced reductive stability of anions in the solvation structure,thus leading to the formation of NaF‐rich SEI.Further investigation on redox kinetics reveals that the NaPF_(6)/diglyme can induce the fast ionic diffusion dynamic and low charge transfer barrier for HC electrode,thus resulting in superior sodium storage performance in terms of rate capability and cycling life,which outperforms those of NaBF_(4)/diglyme and NaSO_(3)CF_(3)/diglyme.Importantly,this work offers valuable insights for optimizing the electrochemical behaviors of electrode materials by regulating the anionic group in the electrolyte.展开更多
Polyvinyl alcohol （PVA）-sodium polyacrylate （PAAS）-KOH-H2O alkaline polymer electrolyte film with high ionic conductivity was prepared by a solution-casting method. Polymer Ni（OH）2/activated carbon （AC） hybrid...Polyvinyl alcohol （PVA）-sodium polyacrylate （PAAS）-KOH-H2O alkaline polymer electrolyte film with high ionic conductivity was prepared by a solution-casting method. Polymer Ni（OH）2/activated carbon （AC） hybrid supercapacitors with different electrode active material mass ratios （positive to negative） were fabricated using this alkaline polymer electrolyte, nickel hydroxide positive electrodes, and AC negative electrodes. Galvanostatic charge/ discharge and electrochemical impedance spectroscopy （EIS） methods were used to study the electrochemical performance of the capacitors, such as charge/discharge specific capacitance, rate charge/discharge ability, and charge/discharge cyclic stability. Experimental results showed that with the decreasing of active material mass ratio m（Ni（OH）2）/m（AC）, the charge/discharge specific capacitance increases, but the rate charge/discharge ability and the charge/discharge cyclic stability decrease.展开更多
Developing supercapacitors(SCs)with long cycling life and wide operative voltage window is a significant topic in the field of aqueous electrolytes.Although the design of water in salt(WIS)electrolytes has pushed the ...Developing supercapacitors(SCs)with long cycling life and wide operative voltage window is a significant topic in the field of aqueous electrolytes.Although the design of water in salt(WIS)electrolytes has pushed the development of aqueous electrolytes to a new height,the WIS electrolytes with an operative voltage window of up to 2.5 V is still very scarce.Herein,in order to enrich the type of aqueous electrolyte with high operative voltage,tetramethylammonium trifluoromethanesulfonate(TMAOTf)based WIS electrolyte was used as a model to construct WIS based hybrid electrolyte with acetonitrile(ACN)co-solvent and LiTFSI co-solute.In view of the coordination effect of ACN and Lit on free water in TMAOTf based WIS electrolyte,the TMAt-Lit-AWIS electrolyte has the electrochemical stabilization window of up to 3.35 V.Further coupled with the commercial YP-50F electrodes,TMAt-Lit-AWIS based SCs exhibited wide operative voltage window(2.5 V),long cycling life(45,000 cycles)and good low-temperature performance(99.99%capacitance retention after 2000 cycles at20℃).The design of this hybrid electrolyte will enrich the types of aqueous hybrid electrolytes with long cycling life and wide operative voltage window.展开更多
All-solid-state lithium metal batteries(ASSLMBs)are emerging as a groundbreaking solution,offering higher energy and power densities along with improved safety compared to conventional lithium-ion systems.However,crit...All-solid-state lithium metal batteries(ASSLMBs)are emerging as a groundbreaking solution,offering higher energy and power densities along with improved safety compared to conventional lithium-ion systems.However,critical challenges remain-particularly the instability at the interface between solid-state electrolytes(SSEs)and lithium metal,and the growth of lithium dendrites.展开更多
Rechargeable lithium-metal batteries that are operated based on reversible metal plating and stripping during the charge/discharge process are known for their high energy density far beyond the conventional,graphite-a...Rechargeable lithium-metal batteries that are operated based on reversible metal plating and stripping during the charge/discharge process are known for their high energy density far beyond the conventional,graphite-anode-based Li-ion batteries[1].However,the hostless structural evolution of Li metal during the anode process easily forms dendrites and could lead to a hazardous short circuit of batteries[2].In addition.展开更多
Subject Code:E02With the support by the National Natural Science Foundation of China and the Chinese Academy of Sciences,the research team led by Prof.Tang Yongbing(唐永炳)at the Functional Thin Films Research Center,...Subject Code:E02With the support by the National Natural Science Foundation of China and the Chinese Academy of Sciences,the research team led by Prof.Tang Yongbing(唐永炳)at the Functional Thin Films Research Center,Shenzhen Institutes of Advanced Technology,Chinese Academy of Sciences,developed a novel tin-graphite dual-ion battery based on sodium-ion electrolyte with high energy density,which展开更多
With a high reversible capacity exceeding 1000 mAh g^(-1),rechargeable sodium-chlorine(Na-Cl_(2))batteries offer a compelling alternative to conventional lithium-ion batteries(e.g.,LiFePO_(4)offers a capacity of less ...With a high reversible capacity exceeding 1000 mAh g^(-1),rechargeable sodium-chlorine(Na-Cl_(2))batteries offer a compelling alternative to conventional lithium-ion batteries(e.g.,LiFePO_(4)offers a capacity of less than 200 mAh g^(-1)),leveraging the abundance and low cost of sodium/chlorine resources[1,2].However,the commercial viability of these batteries has been significantly hindered by the severe corrosivity of the conventional thionyl chloride(SOCl_(2))-based electrolytes.展开更多
Poly(ethylene oxide)(PEO)based electrolytes have garnered considerable attention in all-solid-state lithium metal batteries with superior safety and energy density,but suffer fromlow-ion conductivity and poor cycling ...Poly(ethylene oxide)(PEO)based electrolytes have garnered considerable attention in all-solid-state lithium metal batteries with superior safety and energy density,but suffer fromlow-ion conductivity and poor cycling stability.Herein,a novel in-situ functional crosslinking strategy is proposed to overcome these limitations simultaneously,where a two-in-one bis-diazirine molecule(C1)is not only used as a rigid cross-linker,but also functions as an electron-withdrawing inducer.Benefitting from such an integration of two functionalities into one cross-linker,a rigid PEO electrolyte network can be facilely constructed,while exhibiting disrupted crystallization,robust mechanical strength,loosened Li-O binding to boost the Li+transport,and anion-rich Li+coordinated structure to favor the generation of a stable LiF-rich solid electrolyte interface.As a result,a remarkable ion conductivity of 1.4×10^(−3) S cm^(−1) is achieved at 60◦C together with a Li+transference number of 0.63.And the corresponding LiFePO4||Li and NCM811||Li filled batteries present significantly improved rate performance and capacity retention cycling life compared with the pristine PEO electrolyte,highlighting the great potential of in-situ functional crosslinking for high performance all-solid-state batteries.展开更多
基金the National Natural Science Foundation of China(No.52274347)Fundamental Research Funds for the Central Universities(No.2023CDJYXTD-002)+1 种基金the China Postdoctoral Science Foundation(2024M763863)Open Fund of State Key Laboratory of Advanced Metallurgy(KF24-06).
文摘The rapid surge in global energy consumption stems from escalating electricity demand and sustained economic growth.This underscores the urgent need for efficient,environmentally benign energy storage and conversion technologies.Among various earth-abundant metal-based batteries,magnesium-ion batteries(MIBs)have garnered increasing attention as promising candidates for next-generation green energy systems.
基金Australian Research Council,Grant/Award Numbers:DP200101249,DP210101389,IH180100020Natural Science Foundation of Jiangsu Province,Grant/Award Number:BK20210821National Natural Science Foundation of China,Grant/Award Number:22102141。
文摘Compared with the extensively used ester‐based electrolyte,the hard carbon(HC)electrode is more compatible with the ether‐based counterpart in sodium‐ion batteries,which can lead to improved cycling stability and robust rate capability.However,the impact of salt anion on the electrochemical performance of HC electrodes has yet to be fully understood.In this study,the anionic chemistry in regulating the stability of electrolytes and the performance of sodium‐ion batteries have been systematically investigated.This work shows discrepancies in the reductive stability of the anionic group,redox kinetics,and component/structure of solid electrolyte interface(SEI)with different salts(NaBF_(4),NaPF_(6),and NaSO_(3)CF_(3))in the typical ether solvent(diglyme).Particularly,the density functional theory calculation manifests the preferred decomposition of PF_(6)−due to the reduced reductive stability of anions in the solvation structure,thus leading to the formation of NaF‐rich SEI.Further investigation on redox kinetics reveals that the NaPF_(6)/diglyme can induce the fast ionic diffusion dynamic and low charge transfer barrier for HC electrode,thus resulting in superior sodium storage performance in terms of rate capability and cycling life,which outperforms those of NaBF_(4)/diglyme and NaSO_(3)CF_(3)/diglyme.Importantly,this work offers valuable insights for optimizing the electrochemical behaviors of electrode materials by regulating the anionic group in the electrolyte.
基金Supported by Leading Academic Discipline Project of Shanghai Municipal Education Commission (J50102)
文摘Polyvinyl alcohol （PVA）-sodium polyacrylate （PAAS）-KOH-H2O alkaline polymer electrolyte film with high ionic conductivity was prepared by a solution-casting method. Polymer Ni（OH）2/activated carbon （AC） hybrid supercapacitors with different electrode active material mass ratios （positive to negative） were fabricated using this alkaline polymer electrolyte, nickel hydroxide positive electrodes, and AC negative electrodes. Galvanostatic charge/ discharge and electrochemical impedance spectroscopy （EIS） methods were used to study the electrochemical performance of the capacitors, such as charge/discharge specific capacitance, rate charge/discharge ability, and charge/discharge cyclic stability. Experimental results showed that with the decreasing of active material mass ratio m（Ni（OH）2）/m（AC）, the charge/discharge specific capacitance increases, but the rate charge/discharge ability and the charge/discharge cyclic stability decrease.
基金supported by the Longkou City Science and Technology Research and Development Plan(No.2020KJJH061).
文摘Developing supercapacitors(SCs)with long cycling life and wide operative voltage window is a significant topic in the field of aqueous electrolytes.Although the design of water in salt(WIS)electrolytes has pushed the development of aqueous electrolytes to a new height,the WIS electrolytes with an operative voltage window of up to 2.5 V is still very scarce.Herein,in order to enrich the type of aqueous electrolyte with high operative voltage,tetramethylammonium trifluoromethanesulfonate(TMAOTf)based WIS electrolyte was used as a model to construct WIS based hybrid electrolyte with acetonitrile(ACN)co-solvent and LiTFSI co-solute.In view of the coordination effect of ACN and Lit on free water in TMAOTf based WIS electrolyte,the TMAt-Lit-AWIS electrolyte has the electrochemical stabilization window of up to 3.35 V.Further coupled with the commercial YP-50F electrodes,TMAt-Lit-AWIS based SCs exhibited wide operative voltage window(2.5 V),long cycling life(45,000 cycles)and good low-temperature performance(99.99%capacitance retention after 2000 cycles at20℃).The design of this hybrid electrolyte will enrich the types of aqueous hybrid electrolytes with long cycling life and wide operative voltage window.
文摘All-solid-state lithium metal batteries(ASSLMBs)are emerging as a groundbreaking solution,offering higher energy and power densities along with improved safety compared to conventional lithium-ion systems.However,critical challenges remain-particularly the instability at the interface between solid-state electrolytes(SSEs)and lithium metal,and the growth of lithium dendrites.
基金supported by the National Natural Science Foundation of China(22279028,22179018)the Natural Science Foundation of Hebei Province(B2021205019)the 333 Project of Hebei Province(C20231106).
文摘Rechargeable lithium-metal batteries that are operated based on reversible metal plating and stripping during the charge/discharge process are known for their high energy density far beyond the conventional,graphite-anode-based Li-ion batteries[1].However,the hostless structural evolution of Li metal during the anode process easily forms dendrites and could lead to a hazardous short circuit of batteries[2].In addition.
文摘Subject Code:E02With the support by the National Natural Science Foundation of China and the Chinese Academy of Sciences,the research team led by Prof.Tang Yongbing(唐永炳)at the Functional Thin Films Research Center,Shenzhen Institutes of Advanced Technology,Chinese Academy of Sciences,developed a novel tin-graphite dual-ion battery based on sodium-ion electrolyte with high energy density,which
文摘With a high reversible capacity exceeding 1000 mAh g^(-1),rechargeable sodium-chlorine(Na-Cl_(2))batteries offer a compelling alternative to conventional lithium-ion batteries(e.g.,LiFePO_(4)offers a capacity of less than 200 mAh g^(-1)),leveraging the abundance and low cost of sodium/chlorine resources[1,2].However,the commercial viability of these batteries has been significantly hindered by the severe corrosivity of the conventional thionyl chloride(SOCl_(2))-based electrolytes.
基金supported by National Natural Science Foundation of China(No.52273198)Yunnan Fundamental Research Projects(No.202301BF070001-008)+2 种基金Graduate Research Program of Yunnan University(No.KC23235310)National Key Research and Development Program of China(Nos.2022YFB3803300 and 2023YFE0116800)Beijing Natural Science Foundation(IS23037).
文摘Poly(ethylene oxide)(PEO)based electrolytes have garnered considerable attention in all-solid-state lithium metal batteries with superior safety and energy density,but suffer fromlow-ion conductivity and poor cycling stability.Herein,a novel in-situ functional crosslinking strategy is proposed to overcome these limitations simultaneously,where a two-in-one bis-diazirine molecule(C1)is not only used as a rigid cross-linker,but also functions as an electron-withdrawing inducer.Benefitting from such an integration of two functionalities into one cross-linker,a rigid PEO electrolyte network can be facilely constructed,while exhibiting disrupted crystallization,robust mechanical strength,loosened Li-O binding to boost the Li+transport,and anion-rich Li+coordinated structure to favor the generation of a stable LiF-rich solid electrolyte interface.As a result,a remarkable ion conductivity of 1.4×10^(−3) S cm^(−1) is achieved at 60◦C together with a Li+transference number of 0.63.And the corresponding LiFePO4||Li and NCM811||Li filled batteries present significantly improved rate performance and capacity retention cycling life compared with the pristine PEO electrolyte,highlighting the great potential of in-situ functional crosslinking for high performance all-solid-state batteries.
