Title of article :
Membranes for direct methanol fuel cell based on modified heteropolyacids Original Research Article
Author/Authors :
M.L Ponce، نويسنده , , L.A.S de A. Prado، نويسنده , , V Silva، نويسنده , , S.P Nunes، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2004
Abstract :
Organic-inorganic membranes for direct methanol fuel cell (DMFC) application were prepared from sulfonated polyether ether ketone (SPEEK), containing heteropolyacids and an oxide phase either generated by hydrolysis ofamino-modified silanes or by dispersion of a surface-modified fumed silica. The heteropolyacid was based on lacunary divacant [γ-SiW10O36]−8 and contained epoxy groups which reacted with the ammo-groups in the oxide phase. The reaction provides a covalent bond between the heteropolyacid to the insoluble oxide phase, resulting in its fixation in the membrane. The organic-inorganic composites prepared in this way were more stable than the plain membrane, had lower methanol crossover and proton-conductivity in the same order of magnitude.
Keywords :
Proton-conductive material , Proton conductivity , Fuel cells , Organic-inorganic composite materials , Heteropolyacids
Journal title :
Desalination
Journal title :
Desalination