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研究论文

Li-birnessite型层状二氧化锰的合成及电化学性能

  • 黄行康 ,
  • 常海涛 ,
  • 甘健龙 ,
  • 张清顺 ,
  • 岳红军 ,
  • 吕东平
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  • 福建南平南孚电池有限公司;厦门大学固体表面物理化学国家重点实验室,化学系;厦门大学固体表面物理化学国家重点实验室化学系;

收稿日期: 2009-05-28

  修回日期: 2009-05-28

  网络出版日期: 2009-05-28

Preparation and Electrochemical Properties of Layered Manganese Oxide(Li-birnessite Type)

  • HUANG Xing-kang ,
  • CHANG Hai-tao ,
  • GAN Jian-long ,
  • ZHANG Qing-shun ,
  • YUE Hong-jun ,
  • LV Dong-ping
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  • (1.Fujian Nanping Nanfu Battery Company Limited,Nanping 353000,Fujian,China;2.State Key Laboratory for Physical Chemistry of Solid Surfaces,Department of Chemistry,Xiamen University,Xiamen 361005,Fujian,China

Received date: 2009-05-28

  Revised date: 2009-05-28

  Online published: 2009-05-28

摘要

采用O2氧化法在碱性条件下氧化Mn2+,制备Li-birnessite型层状MnO2.X射线衍射、扫描电子显微镜、BET、热重等技术表征MnO2样品的性能.以放充电法测试Li-birnessite正极材料性能.结果表明,Li-birnessite结晶良好,层间距约为0.70 nm,呈球状或类球状.以Li-birnessite为正极材料的扣式电池在0.2 C(40 mA/g)条件下放电时容量高达203 mAh/g,且具有良好的倍率性能.

本文引用格式

黄行康 , 常海涛 , 甘健龙 , 张清顺 , 岳红军 , 吕东平 . Li-birnessite型层状二氧化锰的合成及电化学性能[J]. 电化学, 2009 , 15(2) : 194 -197 . DOI: 10.61558/2993-074X.1978

Abstract

Layered Li-birnessite was prepared by means of oxidizing Mn2+ with O2 gas in alkaline media.The as-prepared sample was characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD),BET and thermogravimetric/diffenential thermal analysis(TG/DTA) techniques.The electrochemical properties of the material were also investigated.The results show that such a Li-birnessite consists of well-crystallized spherical particles with an interlayer distance of 0.70 nm.The Li-birnessite delivered a high discharge capacity of 203 mAh/g at a rate of 0.2 C(40 mA/g),and had good rate capability as well.
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