Synthesis and electrochemical properties of Li2FeSiO4/C/Ag composite as a cathode material for Li-ion battery

Li 2 FeSiO 4 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....

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Bibliographic Details
Published in:Journal of Central South University 2019-06, Vol.26 (6), p.1443-1448
Main Authors: Tang, Yi-qun, Liu, Xi, Huang, Xiao-bing, Ding, Xiang, Zhou, Shi-biao, Chen, Yuan-dao
Format: Article
Language:English
Subjects:
Electrochemical analysis
Electrode materials
Energy storage
Engineering
Ion diffusion
Lithium-ion batteries
Low conductivity
Metallic Materials
Silver
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Summary:Li 2 FeSiO 4 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 Li 2 FeSiO 4 is introduced to improve the innate electronic conductivity and Li-ion diffusion ability. The results demonstrate that Li 2 FeSiO 4 /C/Ag composite exhibits better electrochemical performance. It possesses a specific discharge capacity of 152, 121, 108 mA∙h/g at 0.2 C , 5 C and 10 C , respectively. At the same time, the Li 2 FeSiO 4 /C/Ag composite shows good cycle stability and a capacity retention ratio of 97.9% after 100 cycles at 1 C .
ISSN:2095-2899
2227-5223
DOI:10.1007/s11771-019-4100-0