应用化学2011，Vol.28Issue(7)：815-820,6.DOI:10.3724/SP.J.1095.2011.00500
多孔不锈钢基二氧化锰薄膜电极的制备及电容特性
Fabrication and Capacitive Characteristics of a Porous Stainless Steel-supported MnO2 Thin Film Electrode
摘要
Abstract
One porous stainless steel-supported manganese dioxide thin film electrode, fabricated by electrochemical method was evaluated as a potential electrode for electrochemical capacitors. The porous stainless steel substrate electrode was obtained by mask electrolysis in the sodium chloride solution containing a lyotropic liquid crystalline phase of p-tert-alkylphenoxy poly(oxyethylene) ether (Triton X-100). Manganese dioxide film was electrodeposited on porous stainless steel substrate under a potentiostatic mode. Liquid crystalline phases were examined using XP-330C polarizing microscope at room temperature. The surface morphologies of the electrode were characterized by SEM. The capacity of manganese oxide film electrode was investigated by cycle voltammetry and constant-current charge-discharge method in potassium sulfate solutions. The results showed that stainless steel exhibited a highly porous surface morphology with an irregular pore size in a range of tens nanometer to hundreds nanometer after electrochemical erosion with liquid crystal mask. The deposited manganese oxide film consisted of spherical particles with an average size of 80 ~ 90 nm. The manganese oxide film electrode presents a specific capacitance of 400 F/g when the charge consumed is 0.4 C/cm2 in electro deposition. The highest capacitance of 320 × 10 -3 F/cm2 could be obtained by cycle voltammetry at a scan rate of 20 mV/s, corresponding to a specific capacitance of 200 F/g. The porous stainless steel-supported manganese dioxide electrode shows promising applications in electrochemical super capacitors.关键词
电化学电容器/多孔电极/电沉积/二氧化锰/液晶掩模Key words
electrochemical capacitor/ porous electrode/ electrodeposition/ manganese dioxide/ liquid crystal mask分类
化学化工引用本文复制引用
徐国荣,彭满芝,唐安平,钟晓伟..多孔不锈钢基二氧化锰薄膜电极的制备及电容特性[J].应用化学,2011,28(7):815-820,6.基金项目
湖南省教育厅资助科研项目(08c341) （08c341）
