纳米电极材料的制备及其电化学性质研究(Ⅲ)——微乳液中通氧气制备MnO_2及其性能

Studies on the Preparation of Nanophase Electrode Materials and Its Electrochemical Properties(Ⅲ)—Performance of nm γ MnO 2 Obtained by Microemulsion Method

本文采用锰盐微乳液中通氧气法成功制备了超细粉末ＭｎＯ２，对所得样品进行了化学分析，ＸＲＤ，ＴＥＭ测试，证明为γＭｎＯ２，平均粒径在纳米级范围内．再经恒电流放电，循环伏安，分形维数，交流阻抗等测试，发现在适当制备条件下所得纳米ＭｎＯ２具有良好的放电性能。

A nanophase MnO 2 was synthesized using w/o microemulsion as reation media, The most favorable experiment conditions for the preparation of nm MnO 2 were researched. XRD,TEM,AC impedance, cyclic voltammetry etc. examinations were used to characterize the sample comparison with the classical MnO 2 (I.C.No.1EMD,electrolytic manganese dioxide). Sample shows that the crystal styucture of the synthesized samples are mainly γ MnO 2, with average particle size in the nanometer as shown by TEM. It was found that the discharge capacity of nm MnO 2 obtained is significantly higher than that of the I.C.No.1 EMD.