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Electrochemical performance of an air-breathing direct methanol fuel cell using poly(vinyl alcohol)/hydroxyapatite composite polymer membrane
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DOI：10.1016/j.jpowsour.2007.11.010.png)
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Abstract
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A novel composite polymer membrane based on poly(vinyl alcohol)/hydroxyapatite (PVA/HAP) was successfully prepared by a solution casting method. The characteristic properties of the PVA/HAP composite polymer membranes were examined by thermal gravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM), micro-Raman spectroscopy and AC impedance method. An air-breathing DMFC, comprised of an air cathode electrode with MnO2/BP2000 carbon inks on Ni-foam, an anode electrode with PtRu black on Ti-mesh, and the PVA/HAP composite polymer membrane, was assembled and studied. It was found that this alkaline DMFC showed an improved electrochemical performance at ambient temperature and pressure; the maximum peak power density of an air-breathing DMFC in 8 M KOH + 2 M CH3OH solution is about 11.48 mW cm(-2). From the application point of view, these composite polymer membranes show a high potential for the DMFC applications. (c) 2007 Elsevier B.V. All rights reserved.
Keywords:
composite polymer membrane
poly(vinyl alcohol) (PVA)
hydroxyapatite (HAP)
direct methanol fuel cell (DMFC)
alkaline
MnO2
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