高等学校化学学报 ›› 2015, Vol. 36 ›› Issue (4): 745.doi: 10.7503/cjcu20140728

• 物理化学 • 上一篇    下一篇

微纳复合结构MFe2O4负极材料的可控合成与性能

岳红云1,2, 王秋娴1,2, 张雪1, 华双1, 马华1, 岳东媛1, 杨书廷1,2()   

  1. 1. 河南师范大学化学化工学院, 新乡 453007
    2. 河南省动力电源及关键材料工程技术研究中心, 新乡 453007
  • 收稿日期:2014-08-04 出版日期:2015-04-10 发布日期:2015-03-27
  • 作者简介:联系人简介: 杨书廷, 男, 博士, 教授, 主要从事锂离子电池关键材料、 电池工艺技术及新型储能系统和关键材料研究. E-mail: shutingyang@foxmail.com
  • 基金资助:
    国家“八六三”计划项目(批准号: 2013AA110104)、 河南师范大学博士科研启动费支持课题(批准号: qd12124)和河南省教育厅重点科技攻关计划项目(批准号: 13A150518)资助

Controllable Synthesis and Performance of Micro-nano Structure MFe2O4(M=Zn, Co) in Lithium-ion Batteries

YUE Hongyun1,2, WANG Qiuxian1,2, ZHANG Xue1, HUA Shuang1, MA Hua1, YUE Dongyuan1, YANG Shuting1,2,*()   

  1. 1. School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
    2. Engineering Technology Research Center of Motive Power and Key Materials of Henan Province,Xinxiang 453007, China
  • Received:2014-08-04 Online:2015-04-10 Published:2015-03-27
  • Contact: YANG Shuting E-mail:shutingyang@foxmail.com
  • Supported by:
    † Supported by the National High Technology Research and Development Program of China(No.2013AA110104), the Research Fund for the Doctoral Program of Henan Normal University, China(No.qd12124) and the Key Project of Science and Technology of Henan Educational Committee, China(No.13A150518).

摘要:

采用新溶剂热体系一步合成MFe2O4(M=Zn/Co)负极材料. 通过调控反应时间可分别制备出由一次纳米颗粒组装成的亚微米级空心和实心球形结构复合材料. 与实心球形微纳复合材料相比, 空心球形微纳复合材料具有结晶度高、 颗粒粒径大、 放电比容量高、 循环性能好及电化学阻抗低等优点. 空心球形ZnFe2O4和CoFe2O4样品充放电循环50周后分别保持655和1180 mA·h/g的比容量, 远高于实心球形ZnFe2O4和CoFe2O4材料的305和524 mA·h/g, 说明微纳复合铁酸盐材料的结构和组装形式对其电性能有较大影响.

关键词: 微纳复合结构, 溶剂热合成, 负极材料, 锂离子电池

Abstract:

Micro-nano structure MFe2O4(M=Zn, Co) materials were synthesized directly by hydrothermal method. The structural and morphological properties of the samples were investigated by means of X-ray diffraction(XRD) and transmission electron microscopy(TEM). The electrochemical performance of MFe2O4(M=Zn, Co) was examined by galvanostatic charge-discharge test and electrochemical alternate current(AC) impedance technique. The results show that hollow sphere CoFe2O4 and ZnFe2O4 have a reversible capacity of 1180 and 655 mA·h/g after 50 cycles, which are higher than those of solid sphere materials. At the same time, the formation mechanism of different morphology was studied.

Key words: Micro-nano structure, Hydrothermal synthesis, Anode material, Lithium-ion battery

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