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Citation: YUAN Chang-Zhou, ZHANG Xiao-Gang, GAO Bo. Electrochemical Capacitance of Alkaline All-solid-state Supercapacitor Based on Nanocrystalline NiO[J]. Chinese Journal of Applied Chemistry, ;2006, 23(12): 1346-1349. shu

Electrochemical Capacitance of Alkaline All-solid-state Supercapacitor Based on Nanocrystalline NiO

1.
Institute of Applied Chemistry, Xinjiang University, Urumqi 830046

Corresponding author: ZHANG Xiao-Gang,
Received Date: 30 December 2005
Available Online: 8 April 2006
Fund Project: 国家自然科学基金(20403014)资助项目 (20403014)

Nanocrystalline NiO was synthesized by pyrolysis of Ni(OH)₂ precursor at 300℃,and alkaline solid polymer electrolyte,PVA-KOH(5 mol/L)-H₂O,was prepared via solution-casting technique,and alkaline NiO-based allsolid-state supercapacitor was fabricated with the nanocrystalline NiO as electroactive material and the alkaline solid polymer electrolyte as electrolyte and spacer.XRD and HRTEM demonstrated that the size of the nanocrystalline NiO with good dispersion was ca.5 nm.Cyclic voltammgoram,galvanostatic charge-discharge,A.C.impedance,leakage current,self-discharge and cycle life tests indicated that all the alkaline all-solid-state supercapacitor exhibited good electrochemical capacitance performance.The specific capacitance and energy density of the supercapacitor were 103.2 F/g and 11.6 kW/kg,respectively,at a current density of 0.2 A/g.Also,the all-solid-state supercapacitor exhibited a good electrochemical stability with a capacitance degradation of 10% over 1 500 cycles.
- nanocrystalline NiO
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