| 热处理温度对石墨复合负极材料电化学性能的影响 |
| Effect of Heat Treatment Temperature on Electrochemical Performance of Graphite Composite Anode for Lithium Ion Battery |
| 作者 | 单位 | E-mail | | 郑安华 | 三峡大学机械与动力学院, 宜昌 443002
三峡大学材料与化工学院, 新能源微电网湖北省协同创新中心, 宜昌 443002 | | | 杨学林 | 三峡大学材料与化工学院, 新能源微电网湖北省协同创新中心, 宜昌 443002 | xlyang@ctgu.edu.cn | | 夏冬冬 | 三峡大学材料与化工学院, 新能源微电网湖北省协同创新中心, 宜昌 443002 | | | 吴璇 | 三峡大学材料与化工学院, 新能源微电网湖北省协同创新中心, 宜昌 443002 | | | 温兆银 | 中国科学院上海硅酸盐研究所, 上海 200050 | |
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| 摘要: 以球形天然石墨为原料,柠檬酸为碳源,通过喷雾造粒及高温热处理得到了高容量石墨复合(G/C)负极材料。利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)和高分辨率透射电子显微镜(HRTEM)对样品物相和微观形貌进行表征,并通过恒流充放电及循环伏安(CV)研究了不同热处理温度对G/C材料电化学性能的影响。2900℃制得样品既具有石墨负极电压曲线特性,又可释放出远高于商品化石墨负极的比容量:首次循环活化后充电比容量为423mAh·g-1,100次循环后仍高达416mAh·g-1,容量保持率为98%。 |
| 关键词: 柠檬酸 G/C 锂离子电池 负极材料 |
| 基金项目: 国家自然科学基金(No.51272128)和湖北省自然科学基金(No.2014CFB667)资助项目。 |
| Abstract: The graphite composite (G/C) anode was prepared by spray drying and high temperature sintering using natural spherical graphite as raw material and citric acid as carbon source. X-ray diffraction (XRD), scanning electron microscope (SEM) and high-resolution transmission electron microscope (HRTEM) were used to characterize crystal structure and morphology of samples. Galvanostatic charge-discharge tests and cyclic voltammentry (CV) were utilized to study the effect of heat treatment temperature on electrochemical performance of G/C anode. With typical voltage feature of graphite anode, G/C-2900 sample shows higher capacity than commercial graphite anode. The charge capacity of the G/C-2900 after the first activation is 423 mAh·g-1, and the 100th charge capacity is 416 mAh·g-1 with capacity retention rate of 98%. |
| Keywords: citric acid G/C lithium-ion battery anode materials |
| 投稿时间：2015-03-10 修订日期：2015-04-15 |
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| 郑安华,杨学林,夏冬冬,吴璇,温兆银.热处理温度对石墨复合负极材料电化学性能的影响[J].无机化学学报,2015,31(6):1159-1164. |
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