物理化学学报 >> 2011, Vol. 27 >> Issue (01): 97-102.doi: 10.3866/PKU.WHXB20110134

电化学和新能源 上一篇    下一篇

二硫化钦作为锉离子电池负极材料的特性

陈仕玉1,2, 王兆翔2, 房向鹏2, 赵海雷3, 刘效疆1, 陈立泉2   

  1. 1. 中国工程物理研究院电子工程研究所, 四川绵阳621900;
    2. 中国科学院物理研究所固态离子学实验室, 北京100190;
    3. 北京科技大学材料科学与工程学院, 北京100183
  • 收稿日期:2010-08-20 修回日期:2010-10-15 发布日期:2010-12-31
  • 通讯作者: 王兆翔 E-mail:zxwang@aphy.iphy.ac.cn
  • 基金资助:

    国家重点基础研究发展规划项目(973) (2009CB220100)资助

Characterization of TiS2 as an Anode Material for Lithium Ion Batteries

CHEN Shi-Yu1,2, WANG Zhao-Xiang2, FANG Xiang-Peng2, ZHAO Hai-Lei3, LIU Xiao-Jiang1, CHEN Li-Quan2   

  1. 1. Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang 621900, Sichuan Province, P. R. China;
    2. Laboratory for Solid State Ionics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China;
    3. School of Material Science and Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
  • Received:2010-08-20 Revised:2010-10-15 Published:2010-12-31
  • Contact: WANG Zhao-Xiang E-mail:zxwang@aphy.iphy.ac.cn
  • Supported by:

    The project was supported by the National Key Basic Research Program of China (973) (2009CB220100).

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摘要：

采用固相法合成了纯六方相的TiS2粉体. X射线衍射(XRD)、扫描电子显微镜(SEM)结果表明该材料具有特征层状结构, 其颗粒大小在10-20 μm之间. 作为锂离子电池负极材料, TiS2在3.00 V(vs. Li+/Li)以下有3个明显的放电平台, 首次可逆容量达668 mAh·g-1, 在第一个放电电压范围(3.00-1.40 V)内具有优异的循环可逆性. 深度放电时由于Li2S的生成和材料颗粒严重破碎, 在低于0.50 V时材料的循环性能不佳. 通过减小材料颗粒度和提高导电剂含量, TiS2的电化学性能得到显著改善.

关键词: TiS2, 锂离子电池, 负极材料, 充放电机制, 改性

Abstract:

Hexagonal TiS2 was synthesized as a high-capacity anode material for lithium ion batteries.X-ray diffraction (XRD) and scanning electron microscopy (SEM) indicated that this material had a layeredstructure with particle sizes between 10 and 20 μm. It shows three discharge plateaus between 3.00 and0.00 V with a reversible capacity of up to 668 mAh·g-1. It has excellent cycling performance between 3.00and 1.40 V. Particle pulverization and formation of Li2S lead to performance degradation because of theirreversible dissolution of Li2S into the electrolyte below 0.50 V. The addition of extra acetylene black and adecrease in particle size markedly improve the electrochemical performance of the TiS2 anode.

Key words: TiS2, Lithium ion battery, Anode material, Charge-discharge mechanism, Modification