The influence of the catalyst layer PBI electrolyte molecular weight on the high temperature PEMFC performance.

• Main Authors: Yi-Pei Lin, 林翊沛
• Other Authors: Tzyy-LungYu
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/88731932264309357281

碩士 === 元智大學 === 化學工程與材料科學學系 === 100 === The polybenzimidazole(PBI),which was synthesized in our lab,with a molecular weight Mw=2.1×105 g/mole was separated into four molecular weights (Mw=1.1×104 、4.6×104 、 9.0×104 and 1.7×105 g/mole) using N-methyl-pyrrolidinone (NMP),N-methylformamide (NMF) mixture solvents and N,N’-dimethyl acetamide (DMAc) solvent. Each of these four PBIs was used to prepare two set of Pt-C/PBI/DMAc catalyst ink solutions. One set of catalyst ink solution was mixed in LiCl as astabilizing agent, which the other set of catalyst ink solution was without LiCl. We found that membrance electrode assemble (MEAs) prepared using samaller Mw PBI had a better fuel cell performance those prepared using high Mw PBI.The fuel cell performance of MEAs prepared from high Mw PBI was improved by using LiCl as a stabilizer. However, for MEAs prepared using low Mw PBIs, LiCl had little influence on the fuel cell performance.