多孔镍基复合膜电极的制备与电化学电容性能  

Fabrication of porous nickel-based composite film electrodes and their electrochemical capacitance performance

作　　者：常玲[1] 方文斌[1] 王建明[1] 

机构地区：[1]浙江大学化学系,杭州310027

出　　处：《中国科技论文》2016年第6期606-609,共4页China Sciencepaper

基　　金：国家自然科学基金资助项目(51174176);高等学校博士学科点专项科研基金资助项目(20120101110045)

摘　　要：为了改善氢氧化镍低的电子电导率,提高其电化学电容性能,制备了多孔镍基复合膜电极。以镍箔为基体,采用恒电位沉积法得到了Ni-Zn合金镀层,通过脱合金化法制备了多孔镍膜。对多孔镍膜进行阳极氧化处理,得到多孔镍基复合膜电极。采用循环伏安法和恒流充放电技术研究了热处理温度对多孔镍基复合膜电极电化学性能的影响。结果表明:合金层的热处理温度可以有效地影响多孔镍基复合膜电极的电化学电容性能。经300℃热处理后的复合膜电极在10A/g的电流密度下循环1 000次后,其比电容为629F/g,电容保持率为96%。In order to improve the low electronic conductivity of nickel hydroxide, porous nickel-based composite film electrodes were prepared to enhance their electrochemical capacitance performance. Herein, Ni-Zn alloy film was obtained on nickel foil by constant potential deposition A porous nickel film was fabricated by dealloying. Porous nickel-based composite film electrodes were further prepared by an anodic oxidation. The effects of annealing temperature on the capacitance performance of the composite film electrodes were investigated using cyclic voltammetry and galvanostatic charge-discharge techniques. The results show that the electrochemical capacity performance of the electrode is dependent on the annealing temperature of the electrodeposited alloy films. The composite film electrode annealed at 300 ℃ delivers a specific capacitance of 629 F/g after 1 000 cycles at a current density of 10 A/g, with a capacity retention of 96%.

关 键 词：氢氧化镍 多孔结构 镍锌合金 电容性能 电沉积 

分 类 号：O646.54[理学—物理化学] TM53[理学—化学]