Effects of jet milling and classifying process on the performance of LiFePO₄/C in full batteries

Authors

Xing-liang LIU, Hefei Guoxuan High-tech Power Energy Co.,Ltd, Hefei, Anhui 230011, China;
Mao-ping YANG, Hefei Guoxuan High-tech Power Energy Co.,Ltd, Hefei, Anhui 230011, China;
Wei-wei WANG, Hefei Guoxuan High-tech Power Energy Co.,Ltd, Hefei, Anhui 230011, China;
Yong CAO, Hefei Guoxuan High-tech Power Energy Co.,Ltd, Hefei, Anhui 230011, China;Follow

Corresponding Author

Yong CAO(yongcao@stu.xmu.edu.cn)

Abstract

The carbon coated lithium iron phosphate (LiFePO₄/C) composite cathode material was prepared by using iron phosphate process. The effects of jet milling and classifying process on the electrochemical performance of LiFePO₄/C cathode material in full batteries were investigted. Scanning electron microscopic analyses suggested that the globose secondary particles were crustily crushed during the jet milling and classifying process, which would further result in lower tap density and carbon content. The LiFeP₄/C composite cathode materials with different physical characteristics were further tested in full batteries to evaluate the electrochemical properties. The results showed no obvious differences in capacity, AC resistance, DC resistance and power density. However, the globose LiFePO₄/C exhibited far better performances in low temperature discharge capacity retention rate and high temperature cycle retention than that of granulated composite cathode, which probably arisen from the certain delamination and destruction of conductive network during the jet milling and classifying process.

Graphical Abstract

Keywords

LiFePO4/C, jet milling and classifying, full battery, electrochemical performance.

DOI Link

https://doi.org/10.13208/j.electrochem.160930

Publication Date

2017-12-28

Online Available Date

2017-06-08

Revised Date

2017-01-14

Received Date

2016-09-30

Recommended Citation

Xing-liang LIU, Mao-ping YANG, Wei-wei WANG, Yong CAO. Effects of jet milling and classifying process on the performance of LiFePO₄/C in full batteries[J]. Journal of Electrochemistry, 2017 , 23(6): 661-666.
DOI: 10.13208/j.electrochem.160930
Available at: https://jelectrochem.xmu.edu.cn/journal/vol23/iss6/4

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