Modifications and Electrochemical Properties of Graphite Fluoride

Authors

Liang Zhang, State Key Laboratory of Advanced Chemical Power Source, Gui Zhou Mei Ling Power Sources Co.Ltd, Zunyi 563003, Guizhou, China;Follow
Hong-mei Zhang, State Key Laboratory of Advanced Chemical Power Source, Gui Zhou Mei Ling Power Sources Co.Ltd, Zunyi 563003, Guizhou, China;
Wei-hua Wan, State Key Laboratory of Advanced Chemical Power Source, Gui Zhou Mei Ling Power Sources Co.Ltd, Zunyi 563003, Guizhou, China;
Jun-hua Wei, State Key Laboratory of Advanced Chemical Power Source, Gui Zhou Mei Ling Power Sources Co.Ltd, Zunyi 563003, Guizhou, China;

Corresponding Author

Liang Zhang(zhy521zl@sina.com)

Abstract

The commercial fluorinated graphite (CF_x) was used as the raw material, which was modified by the reduction of hydrazine hydrate (N₂H₄·H₂O). The effects of hydrazine hydrate contents on the electrochemical properties of fluorinated graphite were systematically studied. The crystal phases and electrochemical properties of the modified fluorinated graphite were analyzed by XRD, SEM, EDS, XPS, EIS techniques and constant current discharge measurement. The results showed that the voltage hysteresis response of Lithium-fluorocarbon battery prepared by the modified fluorinated graphite was obviously improved, while the amount of hydrazine hydrate had an important influence on the electrochemical performance of the materials. The H-CF_x-2 material had the best overall performance (CF_x:C₂H₆O: N₂H₄·H₂O was 1:2:1). At 0.1C, the specific capacity of the material reached 794.5 mAh·g^-1, the platform voltage was 2.53 V, and the low-wave voltage of the voltage hysteresis was 2.37 V.

Graphical Abstract

Keywords

lithium-fluorocarbon battery, fluorinated graphite, hydrazine hydrate, modification

DOI Link

https://doi.org/10.13208/j.electrochem.180131

Publication Date

2018-08-28

Online Available Date

2018-04-16

Revised Date

2018-03-28

Received Date

2018-01-31

Recommended Citation

Liang Zhang, Hong-mei Zhang, Wei-hua Wan, Jun-hua Wei. Modifications and Electrochemical Properties of Graphite Fluoride[J]. Journal of Electrochemistry, 2018 , 24(4): 385-391.
DOI: 10.13208/j.electrochem.180131
Available at: https://jelectrochem.xmu.edu.cn/journal/vol24/iss4/10