| 锂离子蓄电池用天然石墨负极材料 |
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| 引用本文： | 张平伟,叶尚云,李锡力,夏永姚.锂离子蓄电池用天然石墨负极材料[J].电源技术,2007,31(4):281-284. |
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| 作者姓名： | 张平伟 叶尚云 李锡力 夏永姚 |
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| 作者单位： | 个旧圣比和实业有限公司,云南,个旧,661000;复旦大学,化学系,上海市分子催化和功能材料重点实验室,上海,200433 |
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| 摘 要： | 报道了一种高性能锂离子蓄电池用球型天然石墨负极材料,这种材料由天然石墨经球型化处理和化学气相包覆得到.研究了包覆过程中热处理温度、碳包覆量对材料电化学性能的影响.优化条件下得到的碳包覆天然石墨材料首次充放电效率达到92%,可逆比容量为330 mAh/g,50次循环容量维持率为98%.
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| 关 键 词： | 天然石墨 锂离子蓄电池 负极材料 化学气相包覆 |
| 文章编号： | 1002-087X(2007)04-0281-04 |
| 修稿时间： | 2006年9月14日 |
Modified spherically natural graphite anode material of lithium-ion batteries |
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| ZHANG Ping-wei,YE Shang-yun,LI Xi-li,XIA Yong-yao.Modified spherically natural graphite anode material of lithium-ion batteries[J].Chinese Journal of Power Sources,2007,31(4):281-284. |
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| Authors: | ZHANG Ping-wei YE Shang-yun LI Xi-li XIA Yong-yao |
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| Abstract: | A modified spherically natural graphite(MSNG) as negative electrode material was reported.The MSNG was obtained by spherical-treatment from the natural graphite,followed by carbon coating with chemical vapor deposition.The effect of the heat-treatment temperature and coated carbon content on the electrochemical profile was investigated.The results show that the MSNG delivers a reversible capacity of 330 mAh/g with a coulomb efficiency of 92% at first charge-discharge cycle,and shows good rechargeability with a capacity retention of 98% after 50 cycles. |
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| Keywords: | natural graphite lithium-ion batteries anode material chemical vapor deposition |
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