AC/AgO新型复合电化学电容器研究  

A novel hybrid electrochemical capacitor using AgO positive electrode

作　　者：肖成伟[1] 孟宪玲[1] 汪继强[1] 刘兴江[1] 陈益奎[1] 

机构地区：[1]中国电子科技集团公司第十八研究所化学与物理电源技术重点实验室,天津300381

出　　处：《电源技术》2009年第4期273-275,339,共4页Chinese Journal of Power Sources

摘　　要：以活性碳(AC)为负极材料,氧化银(AgO)为正极材料,1.4g/mL的KOH水溶液为电解液,水化纤维素膜为隔膜制备了AC/AgO新型复合电化学电容器。通过交流阻抗、循环伏安、充放电循环等测试考核了其性能。实验表明,AC/AgO新型复合电化学电容器等效串联内阻较低,有效工作电压可达到1.5V以上,具有良好的大电流放电性能和良好的充放电循环性能,以及较好的荷电保持能力。AgO电极在5A/g的电流密度下单电极比电容量达145.2F/g。电容器经过5700次充放电循环后,容量衰减小于10%。A new hybrid electrochemical capacitor, AC/AgO capacitor was prepared, which used activated carbon as negative electrode, silver oxide as positive electrode, 1.4 g/mL KOH aqueous solution as electrolyte, and hydrate cellulose membrane as separator. The performance of AC/AgO capacitor was tested by means of cyclic voltammetry, AC-impedance and galvanostatic charge/discharge method. The results show that the hybrid capacitor has great capabilities such as low equivalent series resistance （RES）,high working voltage（1.5 V）,high-rate discharge ability, long cycle life and low self-discharge. The specific capacity of AgO electrode is 145.2 Fig at the current density of 5 Ng. After 5 700 cycles, the capacity retention of capacitor is more than 90%.

关 键 词：电化学电容器 复合电容器 氧化银 

分 类 号：TM53[电气工程—电器]