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Citation: Deng Hui-Ning, Li Lei, Xu Li, Wang Yu-Xin. Comparison on Properties of Membranes for Direct Methanol Fuel Cell[J]. Acta Physico-Chimica Sinica, ;2004, 20(11): 1372-1375. doi: 10.3866/PKU.WHXB20041117 shu

Comparison on Properties of Membranes for Direct Methanol Fuel Cell

1.
State Key Laboratory of Chemical Engineering, Chemical Engineering Research Center, School of Chemical Engineering and Technology, Tianjin University, Tianjin　300072

Received Date: 23 April 2004
Available Online: 15 November 2004

New proton exchange membranes of sulfonated poly(ether ether ketone)(SPEEK) and sulfonated phenolphthalein poly(ether sulfone)(SPES-C) were prepared and their proton conductivity and methanol permeability were investigated. The new membranes show a high proton conductivity, which is close to that of Nafion especially at high temperature. Methanol permeability of the new membranes is 1～2 order lower than that of Nafion and the SPEEK membrane has the lowest methanol permeability. Direct methanol fuel cell (DMFC) performances of the new PEMs were also studied and the result demonstrates that the membranes with low methanol permeability show a high open circuit voltage. However, the performance of the DMFC is mainly controlled by the proton conductivity of the membranes at high current density.
- Direct methanol fuel cell(DMFC);Proton exchange membrane;Membrane electrode assemble (MEA);Proton conductivity;Methanol permeability
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