In this study, sub-micrometer LiFePO4 particles with high purity and crystallinity were synthesized
using supercritical hydrothermal method as the cathode material for lithium ion batteries. Experimental results
show that templates and calcination time have significant impacts on the purity, particle size and morphology of
LiFePO4 particles. The as-prepared LiFePO4 particles using polyvinyl pyrrolidone (PVP) template with additional
one hour calcination at 700℃ exhibit characteristics of good crystallinity, uniform size distribution, high capacity
and cycling performance. The specific discharge capacities of 141.2 and 114.0mA· h/g were obtained at the
charge/discharge rates of 0.1 and 1.0 C, respectively. It retained 96.0% of an initial capacity after 100 cycles at
1.0 C rate. The good electrochemical performance of the as-synthesized material is attributed to the synergistic
factors of its reasonable particle size and surface areas and high crystallinity.
LIU Xue-wu1,2*(刘学武), WEI Hao1 (魏浩), DENG Yuan-fu2 (邓远富), TANG Jie1 (汤洁), SHI Zhi-cong2 (施志聪), CHEN Guo-hua2,3 (陈国华)
. Synthesis of Sub-micrometer Lithium Iron Phosphate Particles Using
Supercritical Hydrothermal Method for Lithium Ion Batteries[J]. Journal of Shanghai Jiaotong University(Science), 2012
, 17(5)
: 517
-522
.
DOI: 10.1007/s12204-012-1317-6
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