Synthesis and characterization of the cross-linked PVA/TiO₂ composite polymer membrane for alkaline DMFC

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• 作者：Chun-Chen Yang
• 关键词：Direct methanol fuel cell (DMFC) ; PVA ; Composite polymer membrane ; TiO₂ ; MnO₂
• 刊名：Journal of Membrane Science
• 出版年：2007
• 期刊代码：55_03767388
• 类别：ch
• 出版时间：1 February 2007
• 卷：288
• 期：1-2
• 页码：51-60
• 文件大小：1037 K

摘要

A novel PVA/TiO₂ composite polymer membrane was prepared by a solution casting method. Glutaraldehyde (GA) was used as a cross-linker for the composite polymer membrane in order to enhance the chemical, thermal and mechanical stabilities. The characteristic properties of the cross-linked PVA/TiO₂ composite polymer membranes were examined by thermal gravimetric analysis (TGA), X-ray diffraction (XRD), scanning surface microscopy (SEM), and ac impedance method. The novel DMFC, consisting of an air cathode electrode with MnO₂ carbon inks, an anode electrode with PtRu black inks on carbon paper and the PVA/TiO₂ composite polymer membrane, was assembled and examined. It was found that the DMFC using this novel cheap PVA/TiO₂ composite polymer membrane showed good electrochemical performance at ambient temperature and pressure. The maximum peak power density of the alkaline DMFC is about 7.54 mW cm⁻² at 60 °C and 1 atm.