高等学校化学学报 ›› 2019, Vol. 40 ›› Issue (3): 536.doi: 10.7503/cjcu20180514

• 物理化学 • 上一篇    下一篇

TiO2/CNTs复合材料涂覆隔膜的制备及在锂硫电池中的应用

官亦标1,2, 李万隆3, 谢潇怡3(), 曲薇3, 沈进冉2, 傅凯2, 郭翠静2, 周淑琴2, 范红家2, 褚永金2, 陈人杰3,4()   

  1. 1. 新能源与储能运行控制国家重点实验室, 北京100192
    2. 中国电力科学研究院有限公司, 北京100192
    3. 环境科学与工程北京市重点实验室, 北京理工大学材料科学与工程学院, 北京100081
    4. 北京电动车辆协同创新中心, 北京100081
  • 收稿日期:2019-07-20 出版日期:2019-07-20 发布日期:2019-01-24
  • 作者简介:

    联系人简介: 陈人杰, 男, 博士, 教授, 主要从事高容量二次电池新体系、离子液体及新型功能电解质材料研究.E-mail:chenrj@bit.edu.cn;谢潇怡, 女, 博士, 主要从事新型二次电池及相关材料研究. E-mail:xiexiaoyi0328@126.com.

  • 基金资助:
    成果转化项目和北京市重点研发计划项目(批准号: Z181100004518001)资助.

Preparation of TiO2/CNTs Composite Coated Separator and Its Application in Li-S Battery

GUAN Yibiao1,2, LI Wanlong3, XIE Xiaoyi3,*(), QU Wei3, SHEN Jinran2, FU Kai2, GUO Cuijing2, ZHOU Shuqin2, FAN Hongjia2, CHU Yongjin2, CHEN Renjie3,4,*()   

  1. 1. State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems, Beijing 100192, China;
    2. China Electric Power Research Institute, Beijing 100192, China
    3. Beijing Key Laboratory of Environmental Science and Engineering, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China;
    4. Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing 100081, China
  • Received:2019-07-20 Online:2019-07-20 Published:2019-01-24
  • Contact: XIE Xiaoyi,CHEN Renjie E-mail:xiexiaoyi0328@126.com;chenrj@bit.edu.cn
  • Supported by:
    † Supported by the National Key Research and Development Program of China(No.2016YFB0100204), the National Natural Science Foundation of China(No.51772030), the Major Achievements Transformation Project for Central University in Beijing and the Beijing Key Research and Development Plan, China(No.Z181100004518001).

摘要:

以金属有机框架材料MIL-125(Ti)为模板制备了多孔TiO2, 同时引入碳纳米管, 得到碳纳米管交联包覆多孔TiO2的三维导电复合材料. 将该复合材料涂覆在隔膜表面并应用于锂硫电池. 利用透射电子显微镜(TEM)、 扫描电子显微镜(SEM)和X射线光电子能谱仪(XPS)等对材料的结构和组成进行了表征. 电化学测试结果表明,在0.5C(1C=1675 mA/g)倍率下, CNTs/S复合正极材料表现出高达1051.1 mA·h/g的放电容量, 循环150周后仍可保持在904.8 mA·h/g. 在1C倍率下, 放电容量最高可达1036.9 mA·h/g, 循环250周后仍有763.0 mA·h/g, 展现出了良好的倍率性能和循环稳定性.

关键词: 锂硫电池, 金属有机框架, 化学吸附

Abstract:

Porous TiO2 was prepared with metal-organic framework MIL-125(Ti) as template, and CNTs were introduced to form the three-dimensional conductive TiO2/CNTs composite. The TiO2/CNTs composite was coated on one side of the separator and applied in lithium-sulfur battery. The morphology and elemental composition of TiO2 were characterized by transmission electron microscopy(TEM), scanning electron microscopy(SEM) and X-ray photoelectron spectroscopy(XPS). The CNTs/S cathodes with TiO2/CNTs composite coated separator deliver a high initial discharge capacity of 1051.1 mA·h/g and still retain a capacity of 904.8 mA·h/g after 150 cycles at 0.5C. Even at 1C, the capacity is still up to 1036.9 mA·h/g, and a high capacity of 763.0 mA·h/g is retained after 250 cycles, showing good rate performance.

Key words: Li-S battery, Metal-organic framework, Chemical adsorption

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