法拉第效率
碳化
材料科学
阳极
微型多孔材料
煤焦油
微晶
碳纤维
锂(药物)
石墨
化学工程
多孔性
tar(计算)
电化学
锂离子电池
煤
电池(电)
复合材料
电极
有机化学
化学
冶金
扫描电子显微镜
物理化学
工程类
复合数
计算机科学
程序设计语言
内分泌学
功率(物理)
量子力学
医学
物理
作者
Zhihua Guo,Chengyang Wang,Mingming Chen,Mingwei Li
出处
期刊:International Journal of Electrochemical Science
[ESG]
日期:2013-02-01
卷期号:8 (2): 2702-2709
被引量:31
标识
DOI:10.1016/s1452-3981(23)14342-2
摘要
A hard carbon (HC) material was prepared from isotropic coal tar pitch (CTP) by a simple oxidation-carbonization two-step method. Structural analysis showed that the CTP-HC material was a kind of microporous carbon, which was poorly crystallized and contains some graphite-like micro-crystallites. The CTP-HC was investigated as the anode material for lithium ion battery and the reversible capacity of CTP-HC was 576 mAh g−1 with a corresponding coulombic efficiency of 69.5%. After 30 cycles, the reversible capacity of 350.8 mAh g−1 was still achieved. Moreover, the CTP-HC delivered a high reversible capacity of 145 mAh g−1 at a charging rate of 5C (1860 mAh g−1), which is much better than that (36 mAh g−1) of commercial graphitized mesocarbon microbeads (g-MCMB). The excellent electrochemical performance is attributed to the high porosity and the graphite-like micro-crystallites
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