Preparation and Properties of Low Swelling Anion Exchange Membranes for Fuel Cells

Abstract

与质子交换膜燃料电池(PEMFCs)相比,阴离子交换膜燃料电池(AEMFCs)因具有更高的电极反应活性、抗中毒能力和廉价的金属催化剂(如:镍、钴和银等)而备受关注。作为AEMFCs的核心组分,阴离子交换膜(AEMs)同时起着分隔阴阳极反应物和传导离子的作用。在AEMs中,OH-的传导方向是从阴极到阳极,与燃料渗透方向相反,因而可以有效避免燃料因电拖曳作用而发生渗透。即便如此,OH-在水中的相对迁移率远低于H+,导致AEMs的电导率很难达到质子交换膜的水平。为了解决该矛盾,目前最行之有效的办法是设计较高离子交换容量(IEC)的阴离子交换膜。然而,过高的IEC通常使膜过度溶胀,从而降低其机械性能。...Anion exchange membrane fuel cells (AEMFCs) are drawing more attention than proton exchange membrane fuel cells (PEMFCs) owing to their faster electrokinetics, higher catalyst resistance to carbon monoxide and wider choice of non-precious metal catalysts (e.g. Ni, Co and Ag). As a critical component in AEMFCs, anion exchange membranes (AEMs) play a role in separating the fuel and oxygen and simult...学位:工学硕士院系专业:化学化工学院_化学工程学号:2062014115138

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