The carbon powders and film electrode with core shell structure were prepared by carbonization in gas state with using refined coal as shell material and Artificial Graphite and Mesocarbon Microbeads (2 800 ℃) graphite as core material. Galvanostatic charge/discharge measurement showed that both steady charge/discharge capacity and first charge/discharge efficiency were improved. Cyclic voltammetry indicated that the peak at about 0.7 V vs. Li +/Li characteristic of decomposition of electrolyte got weakened, and a more compact film was formed. X ray diffraction measurement suggested the existence of amorphous carbon shell on the carbon powders and carbon film.
Lithium ion battery, Carbon material, Anode, Modification, Core shell structure
Online Available Date
Shuhua Ma, Hanju Guo, Ji Li, Hongze Liang, Xiabin Jing, Fosong Wang.
Surface Modifications of Carbon Materials Used as Anode of Lithium Ion BatteryⅡ.The Carbon Material with Core Shell Structure and Its Positive Effect on Cell Performance of Graphite Anode[J]. Journal of Electrochemistry,
3(1): Article 13.
Available at: https://jelectrochem.xmu.edu.cn/journal/vol3/iss1/13
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