| 锂离子电池负极材料Li_4Ti_5O_(12)的制备及电化学性能 |
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| 引用本文： | 赵尧敏,刘国群,江志裕.锂离子电池负极材料Li_4Ti_5O_(12)的制备及电化学性能[J].稀有金属材料与工程,2009,38(6). |
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| 作者姓名： | 赵尧敏 刘国群 江志裕 |
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| 作者单位： | 1. 中原工学院,河南,郑州,450007
2. 复旦大学,上海,200433 |
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| 基金项目： | 国家自然科学基金，河南省教育厅自然科学研究计划项目，中原工学院骨干教师资助项目 |
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| 摘 要： | 采用嵌段聚合物型表面活性剂P123作为结构导向剂,利用溶胶-凝胶方法制备出纳米TiO2作为合成Li4Ti5O12锂离子电池负极材料的原料之一.然后采用湿法球磨辅助的固相反应合成方法,以丙酮作为球磨介质,制备出Li4Ti5O12锂离子电池负极材科,并对所制备的Li4Ti5O12电极材料进行扫描电镜SEM、透射电镜TEM、粉末X射线衍射(XRD)、循环伏安(CV)以及循环性能测试.电化学性能测试表明所制各出的锂离子电池负极材料Li4Ti5O12具有较高的放电比容量和优异的循环性能.在电流密度为16 mA/g时首次放电比容量为155 mAh/g,首次库仑效率为98.3%.300次循环结束时放电比容量仍可达150.8 mAh/g,约为首次放电比容量的97.3%,300次循环容量仅衰减了2.7%.
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| 关 键 词： | 锂离子电池 固相反应 |
Preparation and Electrochemical Properties of Li_4Ti_5O_(12) Anode for Lithium Ion Battery |
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| Zhao Yaomin,Liu Guoqun,Jiang Zhiyu.Preparation and Electrochemical Properties of Li_4Ti_5O_(12) Anode for Lithium Ion Battery[J].Rare Metal Materials and Engineering,2009,38(6). |
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| Authors: | Zhao Yaomin Liu Guoqun Jiang Zhiyu |
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| Affiliation: | 1. Zhongyuan University of Technology;Zhengzhou 450007;China;2. Fudan University;Shanghai 200433;China |
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| Abstract: | Submicron sized Li4Ti5O12 anode with high discharge capacity and excellent cycle stability for rechargeable lithium ion batteries was prepared by solid state reaction adoping wet ball milling process using acetone as medium. The prepared Li4Ti5O12 were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, cyclic voltammograms, electrochemical impedance spectroscopy and galvanostatic charge-discharge measurements. The first discharge capacity and coulumbic effici... |
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| Keywords: | Li4Ti5O12 |
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