摘要
本文在2.3 V电压、30 mA电流、120 s沉积时间条件下,采用控电位电沉积方法在泡沫镍基体上沉积Co(OH)_2制备了复合电极材料并研究了其超电容性能。结果表明:所获得的复合电极材料表面为纳米片层状Co(OH)_2,且保留了泡沫镍的三维网状结构。这一结构促进了电极活性物质与电解液之间的充分接触以及离子在电极体相中的吸附与脱附,使复合材料具有优异的超电容特性,比电容值高达975.8 F/g(50 mV/s),内阻仅为0.74Ω。
The nano-flake Co(OH)2/Ni foam composite electrode was prepared by electrodepositing Co(OH)2 on the surface of nickel foam at the conditions of potential of 2.3 V, current of 30 mA and deposition time of 120 s. The electrochemical performance of the composite electrode is excellent due to the 3D and nano-flake superstructure, which ensure the contact of active material with electrolyte and facilitate the adsorption/desorption of ions in the electrode solution. The electrode owns the highest specific capacitance of 975.8 F/g at 50 mV/s, and the resistance is only 0.74Ω.
出处
《现代技术陶瓷》
CAS
2016年第5期357-362,共6页
Advanced Ceramics
基金
南京工程学院高层次引进人才科研启动基金(ZKJ201404)
南京工程学院创新基金重大项目(CKJA201502)
江苏省大学生实践创新训练项目(201511276022Z
201611276051X)
关键词
超级电容器
氢氧化钴
泡沫镍
电沉积
Supercapacitor
Cobalt hydroxide
Nickel foam
Electrodeposition