Author:
Fu Jing,Qiao Jinli,Lv Hong,Ma Jianxin,Yuan Xiao-Zi,Wang Haijiang
Abstract
Novel alkaline solid polymer electrolyte membranes have been successfully prepared for poly(vinyl alcohol) (PVA), poly(vinyl alcohol)/poly(vinylpyrrolidone)(PVA/PVP) and poly(vinyl alcohol)/poly(ethylene glycol) dimethyl ether (PVA/PEGDE) by KOH doping. The ionic conductivity(σ) of the membranes was investigated as a function of cross-linking time, blending composition and water content. FT-IR spectroscopy was used for clarifying the conducting mechanism. In particular, the chemical stability of the membranes was investigated toward base treatment with elevated temperature at different KOH concentrations for potential fuel cell applications. The measured conductivity of the membrane ranged from 2.75 to 4.73×10−4 S cm-1 at room temperature for KOH doped PVA and, was greatly enhanced high up to 2 ×10-3 S cm-1 by addition of PVP and 1.5 ×10-3 S cm-1 by addition of PEGDE. The obtained membranes exhibited excellent chemical stability to high concentration base treatment (10M KOH) at elevated temperature of 120oC.
Publisher
The Electrochemical Society
Cited by
43 articles.
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