Quantification on degradation mechanisms of polymer exchange membrane fuel cell cathode catalyst layers during bus and stationary durability test protocols
Quantification on degradation mechanisms of polymer exchange membrane fuel cell cathode catalyst layers during bus and stationary durability test protocols
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客车和固定式耐久性测试协议期间聚合物交换膜燃料电池阴极催化剂层降解机制的量化
DOI：
10.1016/j.jpowsour.2021.230878
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发表时间：
2022-02
影响因子：
9.2
通讯作者：
Hongjie Zhang
中科院分区：
文献类型：
--
作者：
Jiajun Wang;Jiangtao Geng;Manli Wang;Xuezeng Hu;Zhigang Shao;Hongjie Zhang
为了研究质子交换膜燃料电池的耐久性和降解机理，设计了模拟总线和静态协议。结合电化学阻抗谱、x射线荧光谱和x射线衍射谱等表征技术，采用定量方法鉴别性能退化。实验结果表明，对于质子交换膜的衰减，高阴极电位持续时间长的化学衰减比动态载荷引起的机制衰减更严重。阴极催化剂层衰变的主要原因是颗粒生长（~ 35%），其次是Pt溶解（~ 34%）。相比之下，在固定条件下，约43%的ECSA损失是由离聚体/催化剂界面损失造成的。这些信息表明，母线条件导致颗粒生长和Pt溶解，而静止条件导致阴极催化剂层的离聚体/催化剂界面损失。结合更为现实的协议和定量分析方法，可以揭示现实道路中燃料电池的运行状况与MEA退化之间的关系。
Simulating bus and stationary protocols are designed to study the durability and degradation mechanisms of proton exchange membrane fuel cells. A quantitative method combined with characterization techniques, including electrochemical impedance spectroscopy, X-ray fluorescence spectroscopy and X-ray diffraction spectroscopy, is applied to distinguish performance degradation. Experimental results show that, for proton exchange membrane attenuation, chemical attenuation due to high cathode potential with long duration is more severe than mechanism attenuation due to dynamic load. For cathode catalyst layer decay, the principal reason under bus condition is particles growth (∼35%), followed by Pt dissolution (∼34%). In contrast,∼43% ECSA loss results from ionomer/catalyst interface loss under stationary condition. Such information indicates that the bus condition results in particles growth and Pt dissolution while the stationary condition induces ionomer/catalyst interface loss in the cathode catalyst layer. Combining more realistic protocols and quantitative analysis method can reveal the relationship between operating conditions of fuel cell in realistic road and MEA degradation.
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DOI：
10.1149/1.2356219
发表时间：
2006-10
期刊：
--
影响因子：
--
作者：
I. Schneider;D. Kramer;A. Wokaun;G. Scherer
通讯作者：
I. Schneider;D. Kramer;A. Wokaun;G. Scherer
影响因子：
3.9
作者：
D. Myers;Xiaoping Wang;Matt C. Smith;K. More
通讯作者：
D. Myers;Xiaoping Wang;Matt C. Smith;K. More
影响因子：
3.9
作者：
Ahluwalia, Rajesh K.;Arisetty, Srikanth;Polevaya, Olga
通讯作者：
Polevaya, Olga
影响因子：
7.2
作者：
Franck-Lacaze, L.;Bonnet, C.;Lapicque, F.
通讯作者：
Lapicque, F.
湿度和热循环对聚合物电解质膜燃料电池催化剂层结构变化的影响
影响因子：
10.4
作者：
Chang, Yafei;Liu, Jing;Li, Xianguo
通讯作者：
Li, Xianguo