In the realm of advanced electrochemical energy storage,the study of diverse electrolyte salts as integral components of electrolyte engineering has garnered immense attention.Notably,lithium di(fluoro)oxalateborate(L...In the realm of advanced electrochemical energy storage,the study of diverse electrolyte salts as integral components of electrolyte engineering has garnered immense attention.Notably,lithium di(fluoro)oxalateborate(Li DFOB)as the representative DFOB-contained electrolyte salts,which possesses structural attributes resembling both lithium bis(oxalate)borate(LiBOB)and lithium tetrafluoroborate(LiBF4),has garnered significant attention initially as a classical additive for the formation of solid electrolyte interface(SEI)films in graphite anodes.However,its unique properties have also piqued interest in other battery components,encompassing current collectors,capacity-enhanced cathodes or anodes,polymer solid-state electrolytes,and the full batteries.The introduction of Li DFOB or NaDFOB into these batteries exhibits a dual-faceted effect,with the beneficial aspect outweighing the potential drawbacks.Herein,we present a comprehensive overview of the research advancements surrounding LiDFOB,including the synthesis techniques of Li DFOB,the inherent properties of Li DFOB and LiDFOB-based electrolyte solutions,and the impact of LiDFOB on the performance of traditional graphite anodes,capacity-enlarged anodes,various classic cathodes,and the full batteries.And sectional content is about the usage of Na DFOB in Na-ion batteries.This review aims to aid readers in understanding the pivotal role of LiDFOB and NaDFOB as a constituent of electrolytes and how its utilization can influence electrode materials and other components,ultimately altering the electrochemical energy storage device's performance.展开更多
The morphology and electronic structure of a Li4Ti5012 anode are known to determine its electrical and electrochemical properties in lithium rechargeable batteries. Ag-Li4Ti5012 nanofibers have been rationally designe...The morphology and electronic structure of a Li4Ti5012 anode are known to determine its electrical and electrochemical properties in lithium rechargeable batteries. Ag-Li4Ti5012 nanofibers have been rationally designed and synthesized by an electrospinning technique to meet the requirements of one-dimensional （1D） morphology and superior electrical conductivity. Herein, we have found that the 1D Ag-Li4Ti5012 nanofibers show enhanced specific capacity, rate capability, and cycling stability compared to bare Li4Ti5012 nanofibers, due to the Ag nanoparticles （〈5 nm）, which are mainly distributed at interfaces between Li4Ti5O12 primary particles. This structural morphology gives rise to 20% higher rate capability than bare Li4Ti5O12 nanofibers by facilitating the charge transfer kinetics. Our findings provide an effective way to improve the electrochemical performance of Li4Ti5O12 anodes for lithium rechargeable batteries.展开更多
基金financially supported by Talent start-up funds of DGUT(No.221110217)。
文摘In the realm of advanced electrochemical energy storage,the study of diverse electrolyte salts as integral components of electrolyte engineering has garnered immense attention.Notably,lithium di(fluoro)oxalateborate(Li DFOB)as the representative DFOB-contained electrolyte salts,which possesses structural attributes resembling both lithium bis(oxalate)borate(LiBOB)and lithium tetrafluoroborate(LiBF4),has garnered significant attention initially as a classical additive for the formation of solid electrolyte interface(SEI)films in graphite anodes.However,its unique properties have also piqued interest in other battery components,encompassing current collectors,capacity-enhanced cathodes or anodes,polymer solid-state electrolytes,and the full batteries.The introduction of Li DFOB or NaDFOB into these batteries exhibits a dual-faceted effect,with the beneficial aspect outweighing the potential drawbacks.Herein,we present a comprehensive overview of the research advancements surrounding LiDFOB,including the synthesis techniques of Li DFOB,the inherent properties of Li DFOB and LiDFOB-based electrolyte solutions,and the impact of LiDFOB on the performance of traditional graphite anodes,capacity-enlarged anodes,various classic cathodes,and the full batteries.And sectional content is about the usage of Na DFOB in Na-ion batteries.This review aims to aid readers in understanding the pivotal role of LiDFOB and NaDFOB as a constituent of electrolytes and how its utilization can influence electrode materials and other components,ultimately altering the electrochemical energy storage device's performance.
文摘The morphology and electronic structure of a Li4Ti5012 anode are known to determine its electrical and electrochemical properties in lithium rechargeable batteries. Ag-Li4Ti5012 nanofibers have been rationally designed and synthesized by an electrospinning technique to meet the requirements of one-dimensional （1D） morphology and superior electrical conductivity. Herein, we have found that the 1D Ag-Li4Ti5012 nanofibers show enhanced specific capacity, rate capability, and cycling stability compared to bare Li4Ti5012 nanofibers, due to the Ag nanoparticles （〈5 nm）, which are mainly distributed at interfaces between Li4Ti5O12 primary particles. This structural morphology gives rise to 20% higher rate capability than bare Li4Ti5O12 nanofibers by facilitating the charge transfer kinetics. Our findings provide an effective way to improve the electrochemical performance of Li4Ti5O12 anodes for lithium rechargeable batteries.
