O2/H2燃料电池隔膜耐久性建模
Modeling of durability of polyelectrolyte membrane of O2/H2 fuel cell
摘要：
本文讨论了低温H2/O2燃料电池中聚合物质子交换膜（PEM）降解的机理和特点。本文主要研究了运行中燃料电池中OH自由基产生的化学机理及其分布。根据目前的概念，自由基是由沉淀在膜中的Pt颗粒表面处的氢和氧交叉气体产生的。我们明确计算了Pt的沉淀速率和控制它的膜中的电化学电势分布，基于自由基产生速率和Pt分布，我们利用简单的动力学方程计算了膜的降解速率。
英文摘要：
In this paper, we discuss critical aspects of the mechanisms and features of polymer proton exchange membrane (PEM) degradation in low-temperature H2/O2 fuel cell. In this paper, we focused on chemical mechanism of OH radical generation and their distribution in operational fuel cell. According to the current concept, free radicals are generated from hydrogen and oxygen crossover gases at the surface of Pt particles that precipitated in the membrane. We explicitly calculate Pt precipitation rate and electrochemical potential distribution in the membrane that controls it. Based on radical generation rate and Pt distribution we calculate degradation rate of the membrane taking advantage of simple kinetics equations.
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