Sheet like ZnCo2O4 microspheres and Pomelo peel waste derived Activated carbon for high performance solid state asymmetric supercapacitor

This study reports a novel asymmetric supercapacitor based on zinc cobalt oxide (ZnCo 2 O 4 ) as positive electrode and pomelo peel-based activated carbon (PPAC-4) as negative electrode with hydroxyethyl cellulose/potassium hydroxide gel electrolyte.