The development of high-performance and low-cost cathode materials is of great significance for the progress in lithium-ion batteries.The use of Co and even Ni is not conducive to the sustainable and healthy developme...The development of high-performance and low-cost cathode materials is of great significance for the progress in lithium-ion batteries.The use of Co and even Ni is not conducive to the sustainable and healthy development of the power battery industry owing to their high cost and limited resources.Here,we report LiMn_(2)O_(4)integrated with coating and doping by Sn self-segregation.Auger electron energy spectrum and soft X-ray absorption spectrum show that the coating is Sn-rich LiMn_(2)O_(4),with a small Sn doping in the bulk phase.The integration strategy can not only mitigate the Jahn–Teller distortion but also effectively avoid the dissolution of manganese.The as-obtained product demonstrates superior high initial capacities of 124 mAh·g^(-1)and 120 mAh·g^(-1)with the capacity retention of 91.1%and 90.2%at 25℃and55℃after 50 cycles,respectively.This novel material-processing method highlights a new development direction for the progress of cathode materials for lithium-ion batteries.展开更多
Contemporary social problems,such as energy shortage and environmental pollution,require developing green energy storage technologies in the context of sustainable development.With the application of secondary battery...Contemporary social problems,such as energy shortage and environmental pollution,require developing green energy storage technologies in the context of sustainable development.With the application of secondary battery technology becoming widespread,the development of traditional lithium(Li)-ion batteries,which are based on insertion/deinsertion reactions,has hit a bottleneck;instead,conversion-type lithium metal batteries(LMBs)have attracted considerable attention owing to the high theoretical capacity of Li metal anodes.In this review,Li-S,Li-O_(2),and Li-SOCl_(2)batteries are used as examples to summarize LMBs based on their conversion reactions from the perspectives of cathode material,anode material,electrolyte,separator,and current collector.Key challenges exist regarding the conversion reactions of various batteries.To achieve the optimum performance and improve the application effect,several improvement strategies have been proposed in relation to reasonable designs of next-generation high-performance rechargeable batteries.展开更多
基金supported by the International Science&Technology Cooperation of China(No.2019YFE0100200)the National Natural Science Foundation of China(No.53130202)the Basic Research Program of Shanxi Province,China(No.20210302123259)。
文摘The development of high-performance and low-cost cathode materials is of great significance for the progress in lithium-ion batteries.The use of Co and even Ni is not conducive to the sustainable and healthy development of the power battery industry owing to their high cost and limited resources.Here,we report LiMn_(2)O_(4)integrated with coating and doping by Sn self-segregation.Auger electron energy spectrum and soft X-ray absorption spectrum show that the coating is Sn-rich LiMn_(2)O_(4),with a small Sn doping in the bulk phase.The integration strategy can not only mitigate the Jahn–Teller distortion but also effectively avoid the dissolution of manganese.The as-obtained product demonstrates superior high initial capacities of 124 mAh·g^(-1)and 120 mAh·g^(-1)with the capacity retention of 91.1%and 90.2%at 25℃and55℃after 50 cycles,respectively.This novel material-processing method highlights a new development direction for the progress of cathode materials for lithium-ion batteries.
基金supported by the National Natural Science Foundation of China(Nos.52025013,52071184,52171228,21705103,and 52202266)the Natural Science Foundation of Tianjin(No.22JCZDJC00170)+1 种基金the 111 Project(No.B12015)the Fundamental Research Funds for the Central Universities,the Applied Basic Research Project of Shanxi Province(Nos.202103021224251 and 202103021223259).
文摘Contemporary social problems,such as energy shortage and environmental pollution,require developing green energy storage technologies in the context of sustainable development.With the application of secondary battery technology becoming widespread,the development of traditional lithium(Li)-ion batteries,which are based on insertion/deinsertion reactions,has hit a bottleneck;instead,conversion-type lithium metal batteries(LMBs)have attracted considerable attention owing to the high theoretical capacity of Li metal anodes.In this review,Li-S,Li-O_(2),and Li-SOCl_(2)batteries are used as examples to summarize LMBs based on their conversion reactions from the perspectives of cathode material,anode material,electrolyte,separator,and current collector.Key challenges exist regarding the conversion reactions of various batteries.To achieve the optimum performance and improve the application effect,several improvement strategies have been proposed in relation to reasonable designs of next-generation high-performance rechargeable batteries.
