高等学校化学学报 ›› 2014, Vol. 35 ›› Issue (5): 1051.doi: 10.7503/cjcu20131034

• 物理化学 • 上一篇    下一篇

不同形貌聚吡咯对SnO2负极电化学性能的改善

彭鹏, 温兆银(), 刘宇, 杨建华   

  1. 中国科学院上海硅酸盐研究所能量转换重点实验室, 上海 200050
  • 收稿日期:2013-10-23 出版日期:2014-05-10 发布日期:2014-02-25
  • 作者简介:联系人简介: 温兆银, 男, 博士, 研究员, 主要从事固态二次电池及器件研究. E-mail:zywen@mail.sic.ac.cn
  • 基金资助:
    国家自然科学基金(批准号: 51373195)资助

Improvement of Electrochemical Performance of SnO2 Anode by Polypyrrole with Different Morphologies

PENG Peng, WEN Zhaoyin*(), LIU Yu, YANG Jianhua   

  1. CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics,Chinese Academy of Sciences, Shanghai 200050, China
  • Received:2013-10-23 Online:2014-05-10 Published:2014-02-25
  • Contact: WEN Zhaoyin E-mail:zywen@mail.sic.ac.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.51373195)

摘要:

在预先原位合成的聚吡咯溶液中通过简单沉淀得到SnO2/聚吡咯负极材料, 对材料的结构、 形貌进行了表征并对材料的电化学性能进行了研究. 发现不同形貌的聚吡咯对负极材料的电化学性能存在一定影响: SnO2负极材料在球状聚吡咯体系中比在管状聚吡咯体系中的电化学性能优越, 首次库仑效率提高至77.6%, 60次循环后仍剩余600 mA·h/g的可逆比容量.

关键词: SnO2/聚吡咯负极, 管状聚吡咯, 球状聚吡咯, 锂离子电池

Abstract:

SnO2/polypyrrole composites as anode material of lithium ion batteries were in-situ prepared by an one-step precipitation in the suspension of the polypyrrole synthesized in advance. It is found that the morpho-logy of polypyrrole has an obvious effect on the electrochemical performance of SnO2/polypyrrole composite anode. The granular polypyrrole(G-PPy) displayed advantages over the tubular polypyrrole. The composite containing G-PPy reached the first coulombic efficiency of 77.6% and remained a reversible specific capacity higher than 600 mA·h/g after 60 cycles. The good flexibility and adhesion of polypyrrole could make a contribution to the enhancement of the electrochemical performance of SnO2 based anode.

Key words: SnO2/polypyrrole anode, Tubular polypyrrole, Globular polypyrrole, Lithium ion battery

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