Solid asymmetric electrochemical capacitors using proton-conducting polymer electrolytes

descriptionPublicationkeyboard_double_arrow_right Article 01 Apr 2010 English Publisher:Elsevier BVJournal:Electrochemistry Communications, volume 12, pages 517-519 (issn: 1388-2481,

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Authors: Keryn Lian; Qifeng Tian;

doi: 10.1016/j.elecom.2010.01.032

Solid asymmetric electrochemical capacitors using proton-conducting polymer electrolytes

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Abstract

Abstract Solid asymmetric electrochemical capacitors (EC) using polyvinyl alcohol (PVA)–heteropoly acid (HPA) electrolytes and RuO 2 –graphite electrodes were developed. The devices were about 0.2 mm thick and had a working voltage window of 0–1.5 V, 50% wider than that of any proton-conducting symmetric EC. Pseudocapacitance from HPA contributes to the total capacitance of the asymmetric EC within a certain potential window. The PVA–HPA polymers have been proven to function both as electrolyte and as pseudocapacitive electrode material in EC cells.

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