碳纳米管-氢氧化镍复合电极电化学电容器

采用催化裂解法制备了碳纳米管并进一步制备了碳纳米管薄膜电极。基于该种材料的超电容器电极比容量为36 F/g。研究了在碳纳米管薄膜基体上使用电化学方法沉积氢氧化镍的新工艺,制备出碳纳米管/氢氧化镍复合电极。伏安特性曲线以及直流充放电实验证明复合电极的单电极比容量达到63 F/g,交流阻抗谱证明复合电极具有优良的阻抗特性。

Electrochemical Capacitor with the Electrode of Nickel Hydroxide/Carbon Nanotube Composite

The carbon nanotube prepared by catalytic pyrolysis method is considered as an active electrode material for energy storage supercapacitors. Due to its unique mesoporosity, this material has a high capacity of charge accumulation in the electrode/electrolyte interface. Based on carbon nanotube/nickel hydroxide composite electrodes, electrochemical capacitors were made by electrochemical depositing nickel hydroxide on the nanotube electrode. The obtained capacitance reaches 63 F/g. AC impedance curve for carbon nanotube/nickel hydroxide composite electrode indicated that the carbon nanotube framework contributes to the improvement of the impedance performance of electrodeposited nickel hydroxide.