Formation of Membrane Electrode Assembly for High Temperature Methanol Fuel Cells

In this work, a quaternized polysulfone/PTFE/H sub(3)PO sub(4) composite membrane was prepared and used to a high temperature sustainable proton exchange membrane (HTPEM). This HTPEM was prepared based on a porous PTFE membrane, which can sustainable for 200 [degrees]C. Pt/C nano-suspension was prep...

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Bibliographic Details
Published in:Key engineering materials 2015-05, Vol.645-646, p.1175-1180
Main Authors: Wang, Da Zhi, Zhu, Xiao Hu, Zha, Wen, Ren, Tong Qun, Li, Ming Qiang, Liang, Jun Sheng, Liu, Chong
Format: Article
Language:English
Subjects:
Assembly
Cathodes
Deposition
Electrodes
Flow rate
Fuel cells
Membranes
Methyl alcohol
Polytetrafluoroethylenes
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Summary:In this work, a quaternized polysulfone/PTFE/H sub(3)PO sub(4) composite membrane was prepared and used to a high temperature sustainable proton exchange membrane (HTPEM). This HTPEM was prepared based on a porous PTFE membrane, which can sustainable for 200 [degrees]C. Pt/C nano-suspension was prepared and deposited layer-by-layer on the gas diffusion layer (GDL) using electrohydrodynamic atomization (EHDA) deposition technique for the formation of cathode and anode catalyst layers (CLs). The CLs presented well packed and porous features. This EHDA deposited cathode and anode CLs, GDL and HTPEM were assembled to a membrane electrode assembly (MEA) and high temperature methanol fuel cell (HTMFC). The results showed that low concentration and high flow rate of methanol aqueous solution led to the loss of phosphoric acid on HTPEM, which resulted in the decline of the HTPEM. When the concentration and the flow rate of the methanol aqueous solution was increased and reduced, respectively, the cell can work properly at a temperature of 170 [degrees]C.
ISSN:1013-9826
1662-9795
DOI:10.4028/www.scientific.net/KEM.645646.1175