Electrochemical Performance of Nickel Hydroxide/Activated Carbon Supercapacitors Using a Modified Polyvinyl Alcohol Based Alkaline Polymer Electrolyte

›› 2009, Vol. 17 ›› Issue (1): 150-155.

Electrochemical Performance of Nickel Hydroxide/Activated Carbon Supercapacitors Using a Modified Polyvinyl Alcohol Based Alkaline Polymer Electrolyte

孙紫红, 袁安保

Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China

收稿日期:2007-06-21 修回日期:2008-08-08 出版日期:2009-01-28 发布日期:2009-01-28
通讯作者: YUAN Anbao, E-mail: abyuan@shu.edu.cn
基金资助:
Supported by Leading Academic Discipline Project of Shanghai Municipal Education Commission (J50102)

Electrochemical Performance of Nickel Hydroxide/Activated Carbon Supercapacitors Using a Modified Polyvinyl Alcohol Based Alkaline Polymer Electrolyte

SUN Zihong, YUAN Anbao

Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China

Received:2007-06-21 Revised:2008-08-08 Online:2009-01-28 Published:2009-01-28
Supported by:
Supported by Leading Academic Discipline Project of Shanghai Municipal Education Commission (J50102)

摘要/Abstract

摘要： Polyvinyl alcohol(PVA)-sodium polyacrylate(PAAS)-KOH-H₂O alkaline polymer electrolyte film with high ionic conductivity was prepared by a solution-casting method.Polymer Ni(OH)₂/activated carbon(AC) hybrid supercapacitors with different electrode active material mass ratios(positive to negative) were fabricated using this alkaline polymer electrolyte,nickel hydroxide positive electrodes,and AC negative electrodes.Galvanostatic charge/discharge and electrochemical impedance spectroscopy(EIS) methods were used to study the electrochemical performance of the capacitors,such as charge/discharge specific capacitance,rate charge/discharge ability,and charge/discharge cyclic stability.Experimental results showed that with the decreasing of active material mass ratio m(Ni(OH)₂)/m(AC),the charge/discharge specific capacitance increases,but the rate charge/discharge ability and the charge/discharge cyclic stability decrease.

关键词: PVA based alkaline polymer electrolyte, Ni(OH)₂/AC supercapacitor, electrode active material mass ratio, electrochemical performance

Abstract: Polyvinyl alcohol(PVA)-sodium polyacrylate(PAAS)-KOH-H₂O alkaline polymer electrolyte film with high ionic conductivity was prepared by a solution-casting method.Polymer Ni(OH)₂/activated carbon(AC) hybrid supercapacitors with different electrode active material mass ratios(positive to negative) were fabricated using this alkaline polymer electrolyte, nickel hydroxide positive electrodes, and AC negative electrodes.Galvanostatic charge/discharge and electrochemical impedance spectroscopy(EIS) methods were used to study the electrochemical performance of the capacitors, such as charge/discharge specific capacitance, rate charge/discharge ability, and charge/discharge cyclic stability.Experimental results showed that with the decreasing of active material mass ratio m(Ni(OH)₂)/m(AC), the charge/discharge specific capacitance increases, but the rate charge/discharge ability and the charge/discharge cyclic stability decrease.

Key words: PVA based alkaline polymer electrolyte, Ni(OH)₂/AC supercapacitor, electrode active material mass ratio, electrochemical performance

孙紫红, 袁安保. Electrochemical Performance of Nickel Hydroxide/Activated Carbon Supercapacitors Using a Modified Polyvinyl Alcohol Based Alkaline Polymer Electrolyte[J]. , 2009, 17(1): 150-155.

SUN Zihong, YUAN Anbao. Electrochemical Performance of Nickel Hydroxide/Activated Carbon Supercapacitors Using a Modified Polyvinyl Alcohol Based Alkaline Polymer Electrolyte[J]. , 2009, 17(1): 150-155.

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Electrochemical Performance of Nickel Hydroxide/Activated Carbon Supercapacitors Using a Modified Polyvinyl Alcohol Based Alkaline Polymer Electrolyte

Electrochemical Performance of Nickel Hydroxide/Activated Carbon Supercapacitors Using a Modified Polyvinyl Alcohol Based Alkaline Polymer Electrolyte

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