| 碳微米螺旋纤维的电化学特性研究 |
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| 引用本文： | 朱亚波,杨玉杰,徐守冬,项东虎. 碳微米螺旋纤维的电化学特性研究[J]. 中国矿业大学学报, 2011, 40(6) |
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| 作者姓名： | 朱亚波 杨玉杰 徐守冬 项东虎 |
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| 作者单位： | 中国矿业大学材料科学与工程学院,江苏徐州,221116 |
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| 基金项目： | 江苏省自然科学基金项目(BK2008129) |
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| 摘 要： | 用碳螺旋纤维作锂离子电池的电极,选择金属锂片作为对电极和参比电极,系统地测量其极化过程中的充放电曲线、循环性能以及电化学阻抗谱.结果表明：首次放电比容量为304.06mAh/g,首次充电比容量为184.87mAh/g,不可逆比容量为119.19mAh/g;循环实验显示,该材料第150周放电比容量达到170mAh/g,为第2周的80%,循环性能良好,这与碳螺旋纤维的大比表和中空结构密切相关;首次放电阻抗谱显示,当电极电位位于1.2～0.6V时,电解液与螺旋纤维间的固体电解质相界面膜（简称SEI膜）开始生长,所形成的SEI膜性质稳定,这也为维护循环稳定性提供有力保障.
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| 关 键 词： | 碳微米螺旋纤维 充放电比容量 电化学阻抗谱 |
The electrochemical properties of carbon micro-coils |
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| ZHU Ya-bo,YANG Yu-jie,XU Shou-dong,XIANG Dong-hu. The electrochemical properties of carbon micro-coils[J]. Journal of China University of Mining & Technology, 2011, 40(6) |
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| Authors: | ZHU Ya-bo YANG Yu-jie XU Shou-dong XIANG Dong-hu |
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| Affiliation: | ZHU Ya-bo,YANG Yu-jie,XU Shou-dong,XIANG Dong-hu(School of Materials Science and Engineering,China University of Mining & Technology,Xuzhou,Jiangsu 221116,China) |
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| Abstract: | Charge-discharge cycling test and electrochemical impedance spectroscopy(EIS) were made on the Carbon micro-coils(CMCs) electrode as an anode material in a lithium ion battery,to investigate its electrochemical performance.The results show that,the first discharge(insertion) capacity was 304.06 mAh/g with the first charge(extraction) and irreversible capacities of 184.87 mAh/g,and 119.19 mAh/g,respectively.The charge-discharge cycling test demonstrated that the CMC electrode had an excellent cycling perform... |
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| Keywords: | carbon micro-coil charge and discharge capacity electrochemical impedance spectroscopy |
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