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Preparation and Characterization of the $H_3PO_4$-doped Sulfonated Poly(aryl ether benzimidazole) Membrane for Polymer Electrolyte Membrane Fuel Cell  

Hong, Young-Taik (Advanced Materials division, Korea Research Institute of Chemical Technology (KRICT))
Jeong, Jin-Ju (Advanced Materials division, Korea Research Institute of Chemical Technology (KRICT))
Yoon, Kyung-Sock (Advanced Materials division, Korea Research Institute of Chemical Technology (KRICT))
Choi, Jun-Kyu (Advanced Materials division, Korea Research Institute of Chemical Technology (KRICT))
Kim, Young-Jun (High Performance Organic Material Lab., Sungkyunkwan University)
Publication Information
Membrane Journal / v.16, no.4, 2006 , pp. 276-285 More about this Journal
Abstract
Acid-doped sulfonated poly(aryl ether benzimidazole) (S-PAEBI) copolymers were synthesized by a direct polymerization technique and a doping with phosphoric acid as a dopant, and the polymer electrolyte membranes were fabricated from them by a solution casting method. To optimize the reaction condition, the degree of sulfonation and doping level were varied in the ranges of $0{\sim}60%\;and\;0.7{\sim}5.7$, respectively. Physiochemical properties of the doped membranes were investigated by AFM, TGA and the measurement of proton conductivity. It was found that proton conductivities depend on doping levels of membranes. Conductivity determined at the condition of $130^{\circ}C$ and no humidity was $7.3{\times}10^{-2}S/cm$ for the $H_3PO_4$-doped PAEBI membrane with a doping level of 5.7.
Keywords
proton exchange membrane; sulfonated poly(aryl ether benzimidazole); proton conductivity;
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Times Cited By KSCI : 1  (Citation Analysis)
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