文档介绍：金属氧化物超级电容器摘要采用液相法制得α-MnO2 电极材料, 制备成电极并组装成对称型超级电容器. 采用恒流充放电、循环伏安、交流阻抗等方法在三电极体系下对超级电容器的正、负极进行测试, 分别研究它们在充放电过程中的电化学性能. 结果发现, 正极在 ~ V, ~ V (vs. Hg/HgO) 发生电化学反应, 对电容器电压的影响起主要作用, 而负极则表现稳定未发生反应; 随着电极电位的增加, 反应电阻与接触电阻减小, 超级电容器电阻主要由负极决定; 负极表面双电层的形成速度小于正极, 而受电位影响的程度大于正极, 其电荷保持能力优于正极. 关键词金属;氧化物; 超级电容器;; Electrodes in MnO2 Supercapacitor Abstract α-MnO2 was synthesized via a fluid phase way, and prepared as an electrode. Then the symmetry supercapacitor was assembled. Constant current charge-discharge, alternate current (AC) impendence and cyclic voltammetry were carried out to investigate the electrochemical performance of the positive and negative electrodes respectively in charge-discharge processes. The results suggest that some electrochemical reactions occur in the positive electrode ~ V and ~ V (all vs. Hg/HgO) and determine the voltage of the supercapacitor. However, the negative electrode is relatively inert, with no reactions oc-curring. Both reactive and contact resistances diminish with the increase of electrode potential. The negative electrode resistance dominated the supercapacitor, and for it, the rate of duble-layer formation on the sur-face of the negative electrode was less than that of the positive electrode, Keywords manganese dioxide; supercapacitor; 1. 超级电容器的概述又叫双电层电容器(Electrical Doule-Layer Capacitor) 、电化学电容器(Electrochemcial