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电化学(中英文) ›› 2009, Vol. 15 ›› Issue (2): 194-197.  doi: 10.61558/2993-074X.1978

• 研究论文 • 上一篇    下一篇

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;杨勇;   

  1. 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 出版日期:2009-05-28 发布日期:2009-05-28

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

HUANG Xing-kang1,2,CHANG Hai-tao1,GAN Jian-long1,ZHANG Qing-shun1,YUE Hong-jun2,LV Dong-ping2,YANG Yong2   

  1. (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:2009-05-28 Revised:2009-05-28 Published:2009-05-28 Online: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.

关键词: 层状二氧化锰, Li-birnessite, 可充性锂电池, 电化学性能

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.

Key words: layered manganese oxide, Li-birnessite, rechargeable lithium batteries, electrochemical properties

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