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电化学  2012 

纳米MnO2的制备及其电化学性能研究

, PP. 295-300

Keywords: 微乳液法,赝电容,纳米MnO2,嵌入反应,超电容器

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Abstract:

加入不同浓度的十二烷基磺酸钠表面活性剂(SDS)改变微乳液溶液介质,用苯胺还原高锰酸钾,制备了不同颗粒大小的纳米片状MnO2材料.采用X射线粉末衍射、氮吸附比表面测试和扫描电镜及透射电镜表征观察合成材料.电化学测试表明,0.2mol?L-1SDS所合成的纳米MnO2比表面约为228.2m2?g-1,在1mol?L-1Li2SO4电解液中,该电极比电容达到237F?g-1(0.1A?g-1),350oC煅烧MnO2电极还可发生可逆Li+嵌脱反应增加其比电容.

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