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燃料电池膜电极失效原因及机理分析

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质子交换膜燃料电池的寿命与其核心部件质子交换膜的耐久性密切相关.为了探究影响膜电极耐久性的主要因素,采用扫描电子显微镜、X射线荧光光谱仪、弹性模量测试等方法,对工况耐久循环后的失效膜电极进行了分析.结果表明,质子交换膜树脂层脱落、增强层变形是导致膜电极窜漏失效的主要原因.进一步测试结果显示,膜电极中过渡金属元素局部富集,且其弹性模量在横向和纵向分别衰减了 14%和 25%.基于表征数据,深入研究了质子交换膜的失效机理,并提出了后续改进迭代方向.
Causes and Mechanisms of Membrane Electrode Failure in Fuel Cells
The lifespan of proton exchange membrane fuel cells is closely related to the durability of their core component,the proton exchange membrane.In order to explore the main factors affecting the durability of membrane electrodes,methods such as scanning electron microscopy,X-ray fluorescence spectroscopy,and elastic modulus testing were used to analyze the failed membrane electrodes after working condition durability cycling.The results indicate that the detachment of the resin layer and deformation of the reinforcement layer in the proton exchange membrane are the main reasons for the leakage failure of the membrane electrode.Further testing results show that the transition metal elements are locally enriched in the membrane electrode,and its elastic modulus of the membrane electrode delays by 14%and 25%in the transverse and longitudinal directions,respectively.Based on characterization data,the failure mechanism of proton exchange membranes was thoroughly studied,and subsequent improvement and iteration directions were proposed.

fuel cellmembrane electrodefailure causeattenuation mechanism

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上海捷氢科技股份有限公司,上海 201800

燃料电池 膜电极 失效原因 衰减机理

国家重点研发计划可再生能源与氢能技术重点专项

2020YFB1505500

2024

能源与节能
山西省能源研究会 山西省节能研究会

能源与节能

影响因子:0.561
ISSN:2095-0802
年,卷(期):2024.(3)
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