The Composite Supercapacitor

Inspired by the design of composite materials, a novel composite supercapacitor is proposed comprising an integrated cell with high powerand high energy-related electrode materials so that the composite electrochemical double layer capacitor (EDLC) is the equivalent circuit of a high power EDLC of power P1 and energy E1 and a high energy EDLC of power P2 and energy E2 connected in parallel. A methodology is proposed and validated in this study for the design of an application-specific composite supercapacitor of power P and energy E, where P1/E1 > P/E > P2/E2. The methodology was tested successfully in application-specific composite supercapacitors of medium and large size, fabricated in this study in the form of pouch cell with organic electrolyte. The application-specific composite supercapacitors offered a weight reduction of 40-60% compared to same performance supercapacitors based on the high power or on the high energy-related electrode material only.