Polyvinyl alcohol(PVA)-sodium polyacrylate(PAAS)-KOH-H

2

O 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.