Abstract
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.
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