Li2FeSiO4 is deemed to be a potential candidate for large-scale applications because of its abundance,low cost and high safety,etc.Unfortunately,its low conductivity,resulting in poor rate performance,has become a mai...Li2FeSiO4 is deemed to be a potential candidate for large-scale applications because of its abundance,low cost and high safety,etc.Unfortunately,its low conductivity,resulting in poor rate performance,has become a main obstacle to its applications in power battery and energy storage system.In this work,C-Ag coated Li2FeSiO4 is introduced to improve the innate electronic conductivity and Li-ion diffusion ability.The results demonstrate that Li2FeSiO4/C/Ag composite exhibits better electrochemical performance.It possesses a specific discharge capacity of 152,121,108 mA.h/g at 0.2C,5C and 10C,respectively.At the same time,the Li2FeSiO4/C/Ag composite shows good cycle stability and a capacity retention ratio of 97.9%after 100 cycles at 1C.展开更多
基金Project(21771062)supported by the National Natural Science Foundation of ChinaProject(2016JJ2092)supported by the Hunan Provincial Natural Science Foundation,ChinaProject(2019013)supported by the Open Project Program of Key Laboratory of Preparation and Application of Environmental Friendly Materials,Ministry of Education,Jilin Normal University,China
文摘Li2FeSiO4 is deemed to be a potential candidate for large-scale applications because of its abundance,low cost and high safety,etc.Unfortunately,its low conductivity,resulting in poor rate performance,has become a main obstacle to its applications in power battery and energy storage system.In this work,C-Ag coated Li2FeSiO4 is introduced to improve the innate electronic conductivity and Li-ion diffusion ability.The results demonstrate that Li2FeSiO4/C/Ag composite exhibits better electrochemical performance.It possesses a specific discharge capacity of 152,121,108 mA.h/g at 0.2C,5C and 10C,respectively.At the same time,the Li2FeSiO4/C/Ag composite shows good cycle stability and a capacity retention ratio of 97.9%after 100 cycles at 1C.
