journal6 ›› 2005, Vol. 26 ›› Issue (3): 60-64.

• 重点学科 • 上一篇    下一篇

LiMn1.8Co0.1Ni0.1O4络合燃烧法合成及其性质

  

  1.  (吉首大学化学化工学院,湖南 吉首 416000)
  • 出版日期:2005-07-15 发布日期:2012-09-22
  • 作者简介:肖卓炳(1961-),男,湖南省沅江县人,吉首大学化学化工学院副教授,主要从事材料化学研究.
  • 基金资助:

    湖南省自然科学基金资助项目(03JJY6005);湖南省教育厅科研基金资助项目(02C308)

Characterization of LiMn1.8Co0.1Ni0.1O4Prepared by the Combustion-Assisted Soft Route

  1. (College of Chemistry and Chemical Engineering,Jishou University,Jishou 416000,Hunan China)
  • Online:2005-07-15 Published:2012-09-22

摘要:以醋酸锂、醋酸锰、醋酸钴、醋酸镍、柠檬酸、乙二醇为原料,利用燃烧辅助有机酸络合法合成LiMn1.8Co0.1Ni0.1O4,并用X射线衍射、扫描电子显微镜检测和分析产物物相、晶格常数和形貌,用交流阻抗技术研究产物的界面过程,用恒流充放电测试产物的容量和循环性能.研究结果表明:各条件下合成的LiMn1.8Co0.1Ni0.1O4粉末的X射线衍射峰强度大、峰尖锐,粉末具有良好的结晶性和均匀性;LiMn1.8Co0.1Ni0.1O4容量随热处理温度的升高而增大;相对于LiMn2O4,LiMn1.8Co0.1Ni0.1O4的初始容量虽略有下降,但双掺杂后的循环性能得到显著提高.

关键词: 络合法, 掺杂, 锂离子, 电化学

Abstract: Lithium acetate,manganese acetate,cobalt acetate,nickel acetate,citric acid,and glycol being the raw anaterials,LiMn1.8Co0.1Ni0.1O4 powder was prepared by the combustion-assisted complexing method.The phase identification,lattice parameter and morphology were studied by X-ray diffraction and scanning electron microscopy.The electrochemical properties of LiMn1.8Co0.1Ni0.1O4 were carried out by A.C.impedance and galvanostatic charge-discharge experiments.The powders prepared under different conditions are of good crystallinity;the diffraction peak of X-ray is intensive and sharp.The capacity of LiMn1.8Co0.1Ni0.1O4 increases as the temperature rises.Compared with the original capacity,it decreases slighty;however,the cycling behavior improves after double doping.

Key words: complexing method, doping, lithium ion, electrochemistry

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