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燃料电池用聚乙烯醇基碱性聚合物电解质膜的制备及其性能
引用本文:傅婧,张海艳,乔锦丽,马建新.燃料电池用聚乙烯醇基碱性聚合物电解质膜的制备及其性能[J].高分子学报,2011(7):701-708.
作者姓名:傅婧  张海艳  乔锦丽  马建新
作者单位:1. 华东理工大学资源与环境工程学院 上海 200237;同济大学新能源汽车工程中心 上海 201804
2. 东华大学环境科学与工程学院 上海 201620
摘    要:通过在不同浓度KOH溶液中进行掺杂,制备出了聚乙烯醇(PVA)、聚乙烯醇/聚乙烯吡咯烷酮(PVA/PVP)和聚乙烯醇/聚乙二醇二甲醚(PVA/PEGDE)碱性聚合物电解质膜详细考察了膜的外观形貌、微观结构、热稳定性、离子电导率和化学稳定性等.结果表明,PVA与PVP以及PEGDE具有很好的相容性,所制备的复合膜断面致密...

关 键 词:碱性聚合物电解质膜  聚乙烯醇  聚乙烯吡咯烷酮  聚乙二醇二甲醚  化学稳定性

SOLID ALKALINE ELECTROLYTE MEMBRANES BASED ON POLY(VINYL ALCOHOL)FOR POTENTIAL USE IN FUEL CELLS
FU Jing,ZHANG Haiyan,QIAO Jinli,MA Jianxin.SOLID ALKALINE ELECTROLYTE MEMBRANES BASED ON POLY(VINYL ALCOHOL)FOR POTENTIAL USE IN FUEL CELLS[J].Acta Polymerica Sinica,2011(7):701-708.
Authors:FU Jing  ZHANG Haiyan  QIAO Jinli  MA Jianxin
Abstract:The solid alkaline electrolyte membranes have been succesfully prepared from poly(vinylalcohol)(PVA),poly(vinyl alcohol)/poly(vinyl pyrrolidone)(PVA/PVP) and poly(vinyl alcohol)/poly(ethylene glycol) dimethyl ether(PVA/PEGDE) by doping different concentrations of KOH aquaous solutions.The morphology,microstructure,thermal stability,ionic conductivity and chemical stability of the membranes were investigated in detail.The wholly compact and homogeneous composite membranes were obtained due to the good compatibility between PVA and PVP and/or PEGDE,and no obvious phase seperation was observed.The ionic conductivity of the composite membranes was enhanced greatly with increasing the content of PVP and/or PEGDE in polymer.The measured conductivity of the membranes reached as high as up to 2×10-3 S·cm-1 by addition 100% content of PVP and 1.43×10-3 S·cm-1by addition 25% content of PEGDE.The obtained PVA/PVP and PVA/PEGDE membranes exhibited excellent thermal stability and alkaline tolerance where no obvious decrease in ionic conductivty was observed even after the membrane being treated in 10 mol·L-1 KOH at an elevated temperature of 80℃.FTIR spectra results suggested that the KOH absorption of the membranes increased at elevated treatment temperatures,which gave rise to an increase in the OH-charge carriers density.In addition,the methanol uptake of PVA/PVP/KOH and PVA/PEGDE/KOH membranes showed almost no changes after conditioned at elevated temperatures and,were 4 times lower than that of Nafion115 membrane after conditioned at 100℃.It could indicate a potential feasibility as a promising PVA based solid alkaline electrolyte membrane for alkaline fuel cells.
Keywords:Solid alkaline electrolyte membranes  Poly(vinyl alcohol)  Poly(vinyl pyrrolidone)  Poly(ethylene glycol) dimethyl ether  Chemcial stability
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