| 纳米MnO2的制备及其电化学性能研究 |
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| 引用本文： | 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, 2012, 0(4): 295-300 |
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| 作者姓名： | 吴雯 周丹丹 侯孟炎 夏永姚 |
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| 作者单位： | 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 |
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| 基金项目： | 国家杰出青年科学基金项目(No.20925312);纳米重大科学研究计划(No.2011CB935904)资助 |
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| 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,0.20 mol·L-1SDS所合成的纳米MnO2比表面约为228.2 m2·g-1,在1mol·L-1Li2SO4电解液中,该电极比电容达到237 F·g-1(0.1 A·g-1),350℃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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| 关 键 词： | 微乳液法 赝电容 纳米MnO2 嵌入反应 超电容器 |
Preparation and Electrochemical Performance of Nanostructured MnO2 Materials |
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| WU Wen,ZHOU Dan-dan,HOU Meng-yan,XIA Yong-yao. Preparation and Electrochemical Performance of Nanostructured MnO2 Materials[J]. Electrochemistry, 2012, 0(4): 295-300 |
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| Authors: | WU Wen ZHOU Dan-dan HOU Meng-yan XIA Yong-yao |
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| Affiliation: | (Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials,Department of Chemistry, Institute of New Energy,Fudan University,Shanghai 200433,China) |
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| Abstract: | Nanostructured MnO2 materials were prepared in a micro-emulsion medium using sodium dodecyl sulfate(SDS)as 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 size 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℃. |
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| Keywords: | micro-emulsion method pseudo-capacitance nanostructured MnO2 intercalation reaction supercapacitor |
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