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燃料电池催化层的结构增强与物理耐久性 被引量:1

Structure enhancement and physical durability of hydrophilic catalyst layer for PEM fuel cell
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摘要 亲水催化层在湿度循环条件下产生的结构破坏,是目前CCM(Catalyst Coated Membrane)膜电极退化的重要原因。本研究采用复合胶体技术,在亲水催化层中添加聚四氟乙烯(PTFE)结构增强相制备了PTFE/Nafion亲疏水催化层及其CCM膜电极。干湿循环耐久性测试结果表明,PTFE结构增强可以显著提高催化层的抗溶胀应力能力,从而提高CCM膜电极的物理稳定性。 Microstructure decay of the hydrophilic catalyst layer under long-term humidity cycles is one of the most important issues for CCM(catalyst coated membrane) degradation.Approach in the current research was adding hydrophobic PTFE(polytetrafluoroethylene) into the catalyst layer to form a hydrophilic/hydrophobic PTFE/Nafion catalyst layer by a composite colloid methodology.The results demonstrated that the hydrophilic/hydrophobic phase could obviously reduce the humidity-induced stress and improve the physical stability of the catalyst layer and the CCM under humidity cycle conditions.
出处 《电池工业》 CAS 2011年第4期235-238,共4页 Chinese Battery Industry
基金 国家高技术研究发展计划重大项目(2008AA11A106)
关键词 质子交换膜燃料电池 亲水催化层 聚四氟乙烯 物理耐久性 proton exchange membrane fuel cell(PEMFC) hydrophilic catalyst layer polytetrafluoroethylene physical durability
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