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.

Nanostructured MnO₂ materials 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.