Journal
JOURNAL OF POWER SOURCES
Volume 196, Issue 10, Pages 4458-4467Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2011.01.051
Keywords
Poly(vinyl alcohol)Poly(2-acrylamido-2-methyl-1-propanesulfonic acid 3-(Glycidyloxypropyl)trimethoxysilane; Direct methanol fuel cell; Semi-interpenetrating network
Funding
- National Science Council, Taiwan [NSC-96-2221-E131-009-MY2]
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Poly(vinyl alcohol)/poly(2-acrylamido-2-methyl-1-propanesulfonic acid (PAMPS)/3-glycidyloxypropyl)trimethoxysilane (PVA/PAMPS/GFTMS) organic/inorganic proton-conducting polymer membranes are prepared by a solution casting method. PAMPS is a polymeric acid commonly used as a primary proton donor, while 3-(glycidyloxypropyl)trimethoxysilane (GFTMS) is an inorganic precursor forming a semi-interpenetrating network (SIPN). Varying amounts of sulfosuccinic acid (SSA) are used as the cross-linker and secondary proton source. The characteristic properties of PVA/PAMPS/GPTMS composite membranes are investigated by thermal gravimetric analysis (TGA), scanning electron microscopy (SEM), micro-Raman spectroscopy and the AC impedance method. Direct methanol fuel cells (DMFCs) made of PVA/PAMPS/GPTMS composite membranes are assembled and examined. Experimental results indicate that DMFCs employing an inexpensive, non-perfluorinated, organic/inorganic SIPN membrane achieve good electrochemical performance. The highest peak power density of a DMFC using PVA/PAMPS/GFTMS composite membrane with 2M CH3OH solution fuel at ambient temperature is 23.63 mW cm(-2). The proposed organic/inorganic proton-conducting membrane based on PVA/PAMPS/GPTMS appears to be a viable candidate for future DMFC applications. (C) 2011 Elsevier B.V. All rights reserved.
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