Prepareation of Nafion/PBI electro-spun fiber composite membrane and it''s application to fuel cells

• Main Authors: Shih-Hao Liu, 劉士豪
• Other Authors: Tz-Lung Yu
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/34322973203700083649

碩士 === 元智大學 === 化學工程與材料科學學系 === 98 === This study report the influence of polymerization time on the molecular weight of PBI (polybenzimidazole). The PBI with Mw of ~ 1.0×105 g/mol was mixed with DMAc (N,N’-dimethylacetamide) solvent and electrospun from the solution. The PBI electrospun nano-fiber film was crosslinked with glutaraldehyde. The tensile strength of the PBI nano-fiber film was around 37.2MPa. The high mechanical strength PBI nano-fiber film was then immersed in a Nafion solution to prepare Nafion/PBI-fiber composite membranes with a thickness of around 35 ?m. The power density of the membrane electrode assembly (MEA) prepared form the composite membrane was arind 793 mW/cm2 which was higher than that prepared from Nafion-212 (thickness~50 ?m; power density~ 508 mW/cm2).