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Citation: CHEN Ye, SHU Chang, ZHANG Chun-Xia, GE Xin, ZHANG Mi-Lin. Preparation and Supercapacitor Properties of Nickel Oxide[J]. Chinese Journal of Applied Chemistry, ;2007, 24(8): 873-877. shu

Preparation and Supercapacitor Properties of Nickel Oxide

1.
College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001

Corresponding author: CHEN Ye,
Received Date: 4 September 2006
Available Online: 26 December 2006
Fund Project: 教育部博士点基金资助项目(20050217019) (20050217019)

β-Ni(OH)₂ precursor was prepared by direct depositing and then sample powder was obtained by calcining the prepared β-Ni(OH)₂.The results of XRD,SEM and BET for the product show that the samples were cubic NiO.Its supercapacitor properties were studied by cyclic voltammetry (CV),constant current charge/discharge and electrochemical impedance spectroscopy (EIS).The results indicate that NiO exhibits typical Faraday capacitance characteristics.When pH is 11~12,deposition temperature is 30℃ and calcining temperature is 300℃,the specific capacitance of NiO could reach 346 F/g at 3×10^-3 A/cm².The resistance of electrode electrochemistry reaction is 0.24 Ω,the resistance related to the conductivity of the electrode and electrolyte is 0.085 Ω.The obtained NiO has a long cycle life.After 100 times cycles by 5×10^-3 A/cm²,the specific capacitance remains 291.5 F/g and the coulombic efficiency is 93.5%.
- supercapacitor,
- nickel oxide,
- direct deposition
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