机械化学法制备赝电容器电极材料二氧化锰的性能研究  

Characterization of manganese oxides as pseudo-capacitor electrode materials by mechanochemical preparation

作　　者：张莹[1] 刘开宇[1,2] 张伟[1] 

机构地区：[1]中南大学化学化工学院,湖南长沙410083 [2]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《功能材料》2007年第A02期648-653,共6页Journal of Functional Materials

摘　　要：采用机械化学法，在原料摩尔配比（KMnO4/Mn（CH3COO）2）为2：2，2：3和2：4的条件下分别制备二氧化锰．采用XRD对产物结构进行表征，以6mol/LKOH为电解液，采用循环伏安（CV）、交流阻抗、恒电流充放电等技术对所组装赝电容器的电化学性能进行研究．结果表明，随着原料中Mn（CH3COO）2含量增加，产物的结晶度提高；当摩尔配比为2：2时，产物具有较好的电容特性和充放电性能，电极最大放电容量高达504F/g，100次循环后，仍保有472F/g．Abstract： Manganese oxide was prepared by a mechanochemical method based on different mole ratios of KMnO4/Mn（CH3COO）2 namely 2 ; 2, 2 ： 3 and 2 ： 4. The microstructure and morphology were investigated by XRD,BET, and the cyclic voltammetry performance of MnO2 electrode, the charge/discharge capability of supercapacitor assembled were investigated in 6 mol/L KOH. The results showed when increasing Mn（CH3COO）2, the MnO2 prepared exhibited better crystalline; when the mole ratio was 2 ： 2, the product has better capability and charge/discharge performance. A maximum discharge capacitance was as high as 504 F/g, and retained 472 F/g after 100 cycles, only decreased by 6%.

关 键 词：二氧化锰 机械化学法合成 原料摩尔配比 赝电容器 

分 类 号：TM53[电气工程—电器] TM911