A redox-active gel electrolyte for fiber-shaped supercapacitor with high area specific capacitance

Abstract

A new redox-active gel electrolyte has been developed by adding 2-mercaptopyridine to poly(vinyl alcohol)–H₂SO₄ and exhibits reversible redox reactions for a high pseudocapacitance. Upon combination with carbon nanotube/mesoporous carbon hybrid fibers that show large surface areas to fabricate a fiber-shaped supercapacitor, an area specific capacitance of 507.02 mF cm⁻² has been achieved.