Membrane and Active Layer Degradation Following PEMFC Steady-State Operation II. Influence of Pt z + on Membrane Properties
Membrane and Active Layer Degradation Following PEMFC Steady-State Operation II. Influence of Pt z + on Membrane Properties
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PEMFC 稳态运行后的膜和活性层退化 II。
DOI：
10.1149/1.2775282
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发表时间：
2007
影响因子：
3.9
通讯作者：
E. Rossinot
中科院分区：
文献类型：
--
作者：
C. Iojoiu;E. Guilminot;F. Maillard;M. Chatenet;Jean‐Yves Sanchez;E. Claude;E. Rossinot
本论文(第二部分)的目的是了解起源于膜或粘结剂的降解，这些降解严重影响膜电极组件的性能，从而延长蛋白质交换记忆燃料电池的寿命。在第一部分中，提供了铂催化剂的腐蚀和铂离子通过膜的扩散/迁移的证据。在这篇文章中，我们证明了这些铂离子诱导的物理交联会改变膜的热机械性质和电导率。由于物理交联是可逆的，因此进行了非原位实验，通过酸处理恢复原始膜的性能。研究发现，在热区老化的膜比在冷区老化的膜性能受到更大的影响。
This paper (Part II) aims to provide an understanding of the degradations originating in the membrane or the binder and which dramatically affect the membrane electrode assembly performance and therefore the lifespan of protein exchange memory fuel cells. In Part I, evidence was provided of the corrosion of the platinum catalysts and the diffusion/migration through the membrane of platinum cations. In this paper we establish that these platinum cations induce physical cross-links that modify both the thermomechanical properties and the conductivities of the membrane. Since physical cross-links are reversible, ex situ experiments were performed to recover the performance of pristine membranes by acidic treatment. Membrane performance was found to be much more affected in the case of membranes aged in the hot zone rather than in the cold zone.