The object of this study was to evaluate the electrical properties of the planar supercapacitor, which added polyimide powders into cellulose film as base materials. The pattern for the electrical circuit was formed on the prepared cellulose film by irradiating a blue semiconductor laser to fabricate the supercapacitor, where the cellulose film was modified with polyimide powders. Electrical resistance and specific capacitance of a planar supercapacitor were measured to evaluate the effect of the addition of polyimide powders on the addition rate of polyimide powders. Test results showed that the electrical resistance decreased with an increase in the addition rate of polyimide powders and then the specific capacitance was increased with an increase of the addition rate of polyimide powders. This study suggested that for obtaining high capacitance and low electrical resistance, the most suitable conditions of fabrication of a supercapacitor were 1wt% of the addition rate of polyimide powders and 400 mW of laser power.
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