Pulse electrodeposition of α-nickel hydroxide with flower-like nanostructure for supercapacitors
Nickel hydroxide electrodes with flower-like structure were prepared by pulse electrodeposition method.The samples were characterized by XRD,SEM and electrochemical measurements.XRD results show a typical characteristics of α-Ni(OH)2.SEM results show the morphology can be controlled by the ratio between on-time (Ton) and off-time (Toff).If Ton is constant to 10s,a flower-like structure will be obtained when Toff is bigger than 20s.Electrochemical tests revealed that the Nickel hydroxide electrodes prepared atTon=l0s and Toff=30s not only has higher discharge capacity but also exhibits superior stability of capacity during charge-discharge cycling.The maximum specific capacitance in the first cycle is 737.74 F/g and their specific capacitance become stable after cycling 20 times.
Electrochemical capacitors Nickel hydroxide Pseudo-capacitance
Zheng You Xiaofeng Wang Kui Shen Xianghua Kong
Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084,China Institute for Advanced Materials and Technology, University of Science and Technology Beijing,Beijin
国际会议
重庆
英文
429-434
2011-06-23（万方平台首次上网日期，不代表论文的发表时间）