Improved Carbon Corrosion and Platinum Dissolution Durability in Automotive Fuel Cell Startup and Shutdown Operation
Improved Carbon Corrosion and Platinum Dissolution Durability in Automotive Fuel Cell Startup and Shutdown Operation
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DOI：
10.1149/1945-7111/abe6ea
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发表时间：
2021-03
影响因子：
3.9
通讯作者：
Chunmei Wang;M. Ricketts;A. Soleymani;J. Jankovic;James Waldecker;Jixin Chen;Chunchuan Xu
中科院分区：
文献类型：
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作者：
Chunmei Wang;M. Ricketts;A. Soleymani;J. Jankovic;James Waldecker;Jixin Chen;Chunchuan Xu
研究了加速启停（SU/SD）试验的3种方案：阳极和阴极均充空气启停（air-SU/SD）、氢保护启停（H2-SU/SD）和带负荷氢保护启停（H2-SU/SD）。的性能损失，电化学表面积（ECSA）减少，和催化剂层降解的特点和比较这些SU/SD协议。Air-SU/SD方案比氢保护方案表现出更严重的性能损失和催化剂层退化，这证实了氢保护的好处。在20 ~ 70 ℃的温度范围内，温度对空气SU/SD的影响是显著的，低温大大降低了降解。从SU/SD过程中的反应和电荷守恒出发，解释了H2保护和负载牵引减轻碳腐蚀的机理。本文提供了全面的测试数据和故障分析，以量化H2保护和负载的好处，并促进未来增强SU/SD耐久性的系统策略。
Three protocols of accelerated startup and shutdown (SU/SD) test were investigated: startup and shutdown with air supply and soak to both anode and cathode (air-SU/SD), hydrogen protected startup and shutdown (H 2-SU/SD), and hydrogen protected startup and shutdown with a load (H 2-SU/SD with a load). The performance losses, electrochemical surface area (ECSA) reduction, and catalyst layer degradation were characterized and compared for these SU/SD protocols. Air-SU/SD protocol showed much more severe performance loss and catalyst layer degradation than hydrogen protected ones, which confirmed the benefits of hydrogen protection. The temperature effect on air-SU/SD was significant in a broad range from 20 C to 70 C, with low temperature greatly reducing the degradation. The mechanism of H 2 protection and load drawn in alleviating carbon corrosion was explained based on reactions and charge conservation during SU/SD. This paper provides comprehensive test data and failure analysis to quantify the benefits of H 2 protection and load drawn and to facilitate future enhancement of system strategies on SU/SD durability.