纳米MnO2的制备及其电化学性能研究

doi:10.61558/2993-074X.2919

电化学（中英文） ›› 2012, Vol. 18 ›› Issue (4): 295-300. doi: 10.61558/2993-074X.2919

• 化学电源近期研究专辑（武汉大学杨汉西教授主编） • 上一篇下一篇

纳米MnO₂的制备及其电化学性能研究

吴雯, 周丹丹, 侯孟炎, 夏永姚*

复旦大学分子催化与功能材料上海市重点实验室，化学系，新能源研究院，上海 200433

收稿日期:2011-11-19 修回日期:2012-02-24 出版日期:2012-08-28 发布日期:2012-02-29
通讯作者: 夏永姚 E-mail:yyxia@fudan.edu.cn
基金资助:
国家自然科学基金重点项目（No. 20633040）和纳米重大科学研究计划（No. 2011CB935904）资助

Preparation and Electrochemical Performance of Nanostructured MnO₂ Materials

WU Wen, ZHOU Dan-Dan, HOU Meng-Yan, XIA Yong-Yao*

Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy, Department of Chemistry, Fudan University, Shanghai 200433, China

Received:2011-11-19 Revised:2012-02-24 Published:2012-08-28 Online:2012-02-29
Contact: XIA Yong-Yao E-mail:yyxia@fudan.edu.cn

摘要/Abstract

摘要： 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，0.2 mol•L^-1 SDS所合成的纳米MnO2比表面约为228.2 m2•g^-1, 在1 mol•L^-1 Li₂SO₄电解液中，该电极比电容达到237 F•g^-1（0.1 A•g^-1），350 ºC煅烧MnO2电极还可发生可逆Li+嵌脱反应增加其比电容.

关键词: 微乳液法, 赝电容, 纳米MnO₂, 嵌入反应, 超电容器

Abstract: Nanostructured MnO₂materials were prepared in a micro-emulsion medium using sodium dodecyl sulfate (SDS）as a surfactant by a redox reaction between potassium permanganate and aniline. The morphologies of the obtained MnO₂ were critically dependent on the concentrations of SDS. The particle sizes varied with the change in the micro-emulsion medium. The optimized properties of MnO₂ material obtained with the surfactant concentration of 0.2 mol.L^-1 had a specific surface area of 228.2 m².g^-1, and delivered a specific capacitance of 237 F.g ^-1 in 1 mol.L^-1 Li₂SO₄. Additionally, a reversible Li-ion intercalation reaction occurred in the MnO₂ calcined at 350 ^oC.

Key words: micro-emulsion method, pseudo-capacitance, nanostructured MnO2, intercalation reaction, surpercapacitor

中图分类号:

O646

吴雯, 周丹丹, 侯孟炎, 夏永姚. 纳米MnO₂的制备及其电化学性能研究[J]. 电化学（中英文）, 2012, 18(4): 295-300.

WU Wen, ZHOU Dan-Dan, HOU Meng-Yan, XIA Yong-Yao. Preparation and Electrochemical Performance of Nanostructured MnO₂ Materials[J]. Journal of Electrochemistry, 2012, 18(4): 295-300.

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纳米MnO₂的制备及其电化学性能研究

Preparation and Electrochemical Performance of Nanostructured MnO₂ Materials

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