期刊
ELECTROCHIMICA ACTA
卷 59, 期 -, 页码 172-178出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.10.054
关键词
LiCoPO4; Cathode; Lithium-ion batteries; Electrolyte; Thiophene
资金
- 973 Program of China [2009CB220100]
LiCoPO4/C composites were synthesized through a sol-gel route, followed by thermal treatment. X-ray diffraction patterns demonstrate the phase formation of LiCoPO4. Scanning electron microscopy and transmission electron microscopy show the network structure of LiCoPO4/C composites with the grain size ranging from 240 to 350 nm. For the electrochemical measurements of LiCoPO4/C composites in Li test cells, thiophene was added as an electrolyte additive. After 30 cycles, the discharge capacity of LiCoPO4/C composites was 92.8 mAh g(-1) with 68% capacity retention; the improved cyclic performance was attributed to the combination of the network structure LiCoPO4/C composites and the thiophene addition to the electrolyte. (C) 2011 Elsevier Ltd. All rights reserved.
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