摘要
针对目前直接甲醇燃料电池 (DMFC)中普遍使用的Nafion系列全氟磺酸膜存在的甲醇穿透问题 ,制备了在渗透蒸发醇 -水分离领域有良好分离效果的聚乙烯醇 (PVA)和聚乙烯醇 -聚丙烯酸 (PVA -PAA)共混膜并研究了其阻醇和质子导电性能 .与Nafion1 1 7膜相比 ,PVA膜和PVA -PAA共混膜的阻醇性能有明显提高 ,其导电能力虽很大程度上依赖于外加电解质溶液 。
In order to solve the methanol crossover problem caused by the poor alcohol rejecting ability of the membranes currently used in direct methanol fuel cell(DMFC),the blend membranes of polyvinyl alcohol(PVA)-blend-polyacrylic acid(PAA)were prepared.The effects of methanol concentration and membrane composition on the ionic conductivity and the methanol permeability of the membranes were investigated.The methanol permeability of the blend membranes is much lower than Nafion TM membrane while their proton conductivity is poorer.The adding of PAA to PVA improves the conductivity effectively compared with the pure PVA membrane.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2002年第6期1-3,共3页
Membrane Science and Technology
基金
国家 973重大基础研究项目(G2 0 0 0 0 2 64)
国家自然科学基金资助项目(2 99760 33)
关键词
直接甲醇燃料电池
聚合物电解质谱
电导率
甲醇透过率
direct methanol fuel cell
polymer electrolyte membrane
proton conductivity
methanol permeability
