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Proceedings Paper

Advances in solid polymer electrochemical capacitors for high rate applications
Author(s): Keryn Lian; Han Gao
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Paper Abstract

All solid electrochemical capacitors (EC) have been demonstrated using proton conducting silicotungstic acid (SiWA) and poly(vinyl alcohol) (PVA) based polymer electrolytes. Graphite electrodes were utilized for electrochemical double layer capacitors (EDLC), while RuO2 electrodes were employed as pseudocapacitive electrodes. Both solid EDLC and pseudocapacitors exhibited very high charge/discharge rate capability. Especially for solid EDLC, a charge/discharge rate of 25 V/s and a 10 ms time constant ("factor of merit") were obtained. The rate capability of the solid EC is attributable to thin film thickness, good proton conductivity of the polymer electrolyte, and intimate contact between electrode and electrolyte. These results demonstrate promise of polymer electrolytes as enablers of high rate and high performance solid EC devices.

Paper Details

Date Published: 17 May 2011
PDF: 7 pages
Proc. SPIE 8035, Energy Harvesting and Storage: Materials, Devices, and Applications II, 80350G (17 May 2011); doi: 10.1117/12.884930
Show Author Affiliations
Keryn Lian, Univ. of Toronto (Canada)
Han Gao, Univ. of Toronto (Canada)

Published in SPIE Proceedings Vol. 8035:
Energy Harvesting and Storage: Materials, Devices, and Applications II
Nibir K. Dhar; Priyalal S. Wijewarnasuriya; Achyut K. Dutta, Editor(s)

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