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燃料电池全氟质子增强膜的制备及其化学降解机理研究

作者：张烁烁¹，²，王洁¹，²，马晓娟¹，²，宗秀婧¹，²，张永明¹，³，邹业成¹，²

单位： 1.含氟功能膜材料国家重点实验室，山东桓台 256401；2.山东东岳未来氢能材料有限公司，山东淄博 256401；3.上海交通大学化学与化工学院，上海 200240

关键词：燃料电池质子膜；Fenton试剂；耐氧自由基实验；膜寿命测试

DOI号：

分类号： TQ063

出版年,卷(期):页码： 2020,40(5):39-46

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。本文通过溶剂流延法制备了全氟磺酸质子增强膜DMR100，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，DMR100表现出优异的化学耐久性：DMR100在Fenton加速体系中化学降解24h后，DMR100的质量损失率为3.96%，质子传导率>35 mS/cm（80℃，50%RH），氟离子释放率为0.14×10-5 mol·L-1，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。

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. We used ex situ accelerate tests to study membrane degradation, soaking a piece of membrane in Fenton’s regent. The results show that DMR100 exhibited excellent chemical durability. After 24 hours of Fenton accelerated reagent treatment, mass loss rate of DMR100 was 3.96%, proton conductivity > 35 mS / cm (80 ℃, 50% RH), and the fluoride ion release rate was 0.14×10-5 mol·L-1, 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.

基金项目：

山东省重大科技创新工程项目（2018YFJH0102）

作者简介：

张烁烁（1994-），女，山东淄博，硕士，工程师助理，山东东岳高分子材料有限公司，含氟功能膜开发与分析，E-mail：shuozhang321@126.com

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