| 离子聚合物包覆的锂离子电池炭负极材料 |
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| 引用本文： | 潘钦敏,郭坤琨,王玲治,方世璧. 离子聚合物包覆的锂离子电池炭负极材料[J]. 电池, 2002, 32(Z1): 38-40 |
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| 作者姓名： | 潘钦敏 郭坤琨 王玲治 方世璧 |
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| 作者单位： | 中国科学院化学研究所,北京,100080 |
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| 基金项目： | 国家自然科学基金，50173029， |
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| 摘 要： | 用辐射聚合的方法在天然石墨颗粒表面包覆一层离子聚合物可以明显提高天然石墨的各种电化学性能,如首次库仑效率、循环性能.拉曼光谱研究表面包覆的离子聚合物可以明显抑制由于溶剂化锂离子共嵌入而造成的石墨层破坏,从而提高了石墨表面结构稳定性.扫描电镜照片显示包覆石墨表面形成的SEI膜在循环过程中保持稳定的形态,防止了石墨电极在循环过程中的阻抗增加现象.
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| 关 键 词： | 锂离子电池 石墨负极 表面包覆 离子聚合物 |
| 文章编号： | 1001-1579(2002)S1-0038-03 |
| 修稿时间： | 2001-04-08 |
Ionic conductive polymer encapsulated graphite as anode material for lithium ion batteries |
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| PAN Qin-min,GUO Kun-kun,WANG Ling-zhi,FANG Shi-bi. Ionic conductive polymer encapsulated graphite as anode material for lithium ion batteries[J]. Battery Bimonthly, 2002, 32(Z1): 38-40 |
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| Authors: | PAN Qin-min GUO Kun-kun WANG Ling-zhi FANG Shi-bi |
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| Abstract: | A novel graphite material for lithium ion batteries was prepared by encapsulation of an ionic conductive polymer on the surface of natural graphite particles via radiation-initiated polymerization. The obtained graphite showed great improvement in electrochemical performance such as initial coulombic efficiency and cycle ability compared with the original natural graphite. Raman spectroscopy indicated that structural stability of the graphite surface was enhanced, which was due to the fact that encapsulated polymer could depress the exfoliation of graphite layers caused by co-intercalation of solvent molecules. The solid electrolyte inter-face(DEI)film formed on the encapsulated graphite electrode kept stable morphology during the repeated cycling and thus avoided increasing in the electrode impedance. |
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| Keywords: | lithium ion batteries graphite anode encapsulation ionic conductive polymer |
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