Manganese oxide supercapacitors with aqueous hydrogel electrolytes
Journal
ECS Transactions
Journal Volume
16
Journal Issue
1
Pages
197-200
Date Issued
2008
Author(s)
Abstract
Two poly(acrylic acid)-based gel electrolytes have been characterized for their application to MnO2•nH2O supercapacitors. The gel polymer electrolytes (GPEs) consist of either poly(acrylic acid) or poly (acrylic acid)-co-poly(acrylamide) with 1 M KCl aqueous solution (weight composition, polymer : KCl : H2O = 9%: 6.7%: 84.3%). The GPEs show no fluidity, while possessing ionic conductivities in the order of 10-1S cm-1. The electrochemical performance of MnO2-GPE supercapacitors have been investigated, and compared with liquid electrolyte counterpart. While both GPEs can give high initial capacitance, the copolymer one gives remarkably enhanced cycled stability.
SDGs
Type
conference paper