物理化学学报2011，Vol.27Issue(6)：1424-1430,7.
基于双相不锈钢制备超级电容器电极材料MnO2
Preparation of Manganese Dioxide for Electrodes of Supercapacitors Based on Duplex Stainless Steel
摘要
Abstract
A nano-structured manganese dioxide thin film was electrochemically deposited onto a 2304 duplex stainless steel (DSS) electrode. The structure, surface morphology, and composites of the obtained manganese dioxide were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray energy dispersive spectroscopy (EDS), respectively. The electrochemical characteristics of the manganese dioxide electrodes were investigated by cyclic voltammetry (CV), chronopotentiometry, and electrochemical impedance spectroscopy (ELS). The obtained manganese dioxide was found to be amorphous and the surface was composed of nanorods with lengths between 100 and 200 nm. As the mass of the manganese dioxide increased the capacitance also increased while the specific capacitance decreased. With an increase in the CV scan rate the specific capacitance decreased as well. The highest specific capacitance value of 288.9 F· g-1 was obtained at a scan rate of 20 mV· s-1 when the mass of manganese dioxide was 0.09 mg. 500 cycles were carried out at a rate of 100 mV·s-1 and we found that the specific capacitance remained stable and even increased slightly as the cycles increased.关键词
超级电容器/MnO2/电沉积/比电容/电极材料Key words
Supercapacitor/ MnO2/ Electrodeposition/ Specific capacitance/ Electrode material分类
化学化工引用本文复制引用
李钊,徐菊良,李旭晏,郭丽芳,李劲,蒋益明..基于双相不锈钢制备超级电容器电极材料MnO2[J].物理化学学报,2011,27(6):1424-1430,7.基金项目
上海市自然科学基金(09ZR1402600),上海市科委重点研究基金(09JC1401600),上海市高新技术产业化重点项目计划及复旦大学本科生学术研究资助计划 （09ZR1402600）
