Synthesis of direct methanol fuel cell：Fabrication and Test of poly(vinyl alcohol) MEAs

• Main Authors: Zhi-Yuan Yang, 楊智淵
• Other Authors: Horng-Jer Tai
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/71697273016718683323

碩士 === 義守大學 === 生物技術與化學工程研究所碩士班 === 95 === Sulfosuccinic acid ( SSA ) was used to crosslink poly(vinyl alcohol) ( PVA ) and fabricate both a lower methanol permeability proton exchange membrane and membrane electrode assembly for direct methanol fuel cell. As the SSA loading increased, the swell ratio values were increased, and both anode and cathode plasisols were also crosslinked. The conductivity was increased with increasing SSA loadind and followed the Arrhenius equation. Both the anode and cathode pastes in membrane electrode assembly had trivil resistance. The water uptake was had a inverse proportion relation with increasing SSA loading, and the water uptake value of anode plasisol was greater than cathode plasisol. The ion exchange capacity ( IEC ) increases with increasing SSA loading. From methanol crossover, it was found that with increasing temperature, the methanol permeability values were increased, nevertheless, as SSA loadind increasing, the amount of methanol in cathode were decreased. The methanol permeability values of PVA/SSA membrane were much lower compared with Nafion. In single cell test, we can develop a standard steps to fabricate membrane electrode assembly, The current density values of single cell was 16mA/cm2, at the same time, also found that the current density was increased with increasing both temperature and methanol concentration.