Manganese oxide electrochemical capacitor with potassium poly(acrylate) hydrogel electrolyte
Resource
Journal of Power Sources 179 (1): 430-434
Journal
Journal of Power Sources
Journal Volume
179
Journal Issue
1
Pages
430-434
Date Issued
2008
Date
2008
Author(s)
Lee, Kuang-Tsin
Abstract
An aqueous gel electrolyte has for the first time been successfully applied to the MnO2·nH2O-based pseudocapacitive electrochemical capacitors (ECs). The gel electrolyte is made of potassium poly(acrylate) (PAAK) polymer and aqueous solution of KCl. With the selected composition, PAAK:KCl:H2O = 9.0%:6.7%:84.3% by weight, the gel shows no fluidity, possessing an ionic conductivity in the order of 10-1 S cm-1. The gel electrolyte has been found to give substantially higher specific capacitances than those in the liquid electrolyte with the same salt (KCl) composition (1 M) and high power capability (>10 kW/kg). © 2008 Elsevier B.V. All rights reserved.
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Type
journal article
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