聚芳醚电解质膜甲醇透过性研究

摘要直接甲醇燃料电池（DMFC）以甲醇溶液为燃料，具有能效高、能量密度高、环境友好及可便携的优点。用于DMFC的电解质膜材料的甲醇渗透性是影响电池发电性能的主要性能指标之一。本论文采用气相色谱法、结合吸甲醇率及甲醇溶液中的尺寸变化率考察了多类基于聚芳醚的电解质膜材料的甲醇渗透性，包括侧链型含氟磺化聚芳醚砜阳离子交换膜（sSPFAES）、无规杂化季铵化聚芳醚砜阴离子交换膜，嵌段季铵化聚芳醚砜阴离子交换膜（bQPAES）及交联嵌段季铵化聚芳醚砜阴离子交换膜，并与Nafion 212进行了对比。结果表明，除两类离子交换容量较高的bQPAES膜外，其余离子交换膜的甲醇渗透率（1。00~8。62×10-7 cm2/s）均低于Nafion 212膜（1。13×10-6 cm2/s），其中两类sSPFAES膜的甲醇渗透率最低（1。00~1。21×10-7 cm2/s）。由于所有阴离子交换膜的电导率较低，因此选择性系数（1。47~7。88×104 S s/cm3）低于Nafion 212膜（9。52×104 S s/cm3），而阳离子交换膜的选择性系数（13。2~19。4×104 S s/cm3）高于Nafion 212膜，在直接甲醇燃料电池中有较好的应用前景。76963

毕业论文关键词直接甲醇燃料电池，甲醇透过，聚合物电解质膜，气相色谱法，聚芳醚

毕业设计说明书外文摘要

Title Study on the methanol permeability of the polymer electrolyte membrane derived from Poly (aryl ether)s

Abstract Direct methanol fuel cell (DMFC) uses methanol solution as fuel, has the advantages of high efficiency, energy density, environment friendship and portability。 The methanol permeability of the polymer electrolyte membrane in DMFC is one of the key factors that influence the cell performance。 The methanol permeability of several types of poly(aryl ether)-based polymer electrolyte membranes were investigated by gas chromatography, dimensional changes and solution uptakes in methanol solutions, and compared with Nafion 212。 The membranes included cation exchange membranes derived from side-chain type partial fluorinated sulfonated poly(aryl ether) (sSPFAES), anion exchange membranes derived from random type composite quaternary ammonium poly(aryl ether sulfone)s, block quaternary ammonium poly(aryl ether sulfone)s (bQPAES) and crosslinked block quaternary ammonium poly(aryl ether sulfone)s。 All those membranes exhibited lower methanol permeability (1。00~8。62×10-7 cm2/s) than Nafion 212 (1。13×10-6 cm2/s) except two bQPAES membranes with relatively high ion exchange capacities while the sSPFAES membranes showed the lowest methanol permeability (1。00~1。21×10-7 cm2/s)。 All the anion exchange membranes displayed lower selectivity (1。47~7。88×104 S s/cm3) than Nafion 212 (9。52×104 S s/cm3) due to their low ion conductivity。 The two cation exchange membranes showed higher selectivity (13。2~19。4×104 S s/cm3) than Nafion 212, suggesting their potential in DMFC applications。

Keywords: direct methanol fuel cell methanol crossover polymer electrolyte membrane gas chromatography poly(aryl ether)

1 绪论 1

1。1 DMFC特点及原理 1

1。2 电解质膜 2

1。3 甲醇透过率及其测试方法 2

1。4论文研究目的和主要内容 3

2 实验部分 5

2。1 实验设备与试剂 5

2。2 分析方法 6

2。3 膜材料及结构式 6 聚芳醚电解质膜甲醇透过性研究:http://www.youerw.com/huaxue/lunwen_88372.html