【摘要】 质子交换膜是氢燃料电池的核心关键材料,其耐久性直接影响着质子交换膜燃料电池的使用寿命.通过溶剂流延法制备了全氟磺酸质子增强膜,并通过Fenton加速体系对质子交换膜的耐久性进行了研究.结果表明,该质子增强膜表现出优异的化学耐久性:在Fenton加速体系中化学降解24 h后质量损失率为3.96%,质子传导率>35mS/cm（80℃,相对湿度50%）,氟离子释放率为0.14×10^-5 mol/L,优于两款市场上常用的质子交换膜.·OH、·HOO等自由基攻击质子交换膜高分子链中的C-O-C键,致使侧链发生断裂,逐渐从主链上脱落,质子交换膜性能降低.更多还原

【Abstract】 Proton exchange membrane is one of the key materials in the PEMFC. Durability of the proton exchange membranes directly affects the lifetime of the PEMFC. This paper prepared perfluorosulfonate proton enhanced membrane by tape casting. Ex situ accelerate tests were carried out to study membrane degradation, soaking a piece of membrane in Fenton’s regent. The results show that the proton enhanced membrane exhibited excellent chemical durability. After 24 h of Fenton accelerated reagent treatment, mass loss rate of membrane was 3.96%, proton conductivity >35 mS/cm（80 ℃, 50% RH）, and the fluoride ion release rate was 0.14×10^-5 mol/L, which is better than the two proton exchange membranes commonly used in the fuel cell industry. Free radicals such as·OH and·HOO attack the C-O-C bond of the main chain and result in the loss of the polymer repeat units and the degrading the durability of the proton exchange membrane.更多还原