Analysis Method of Oxygen Permeation Resistance of Ionomer in Cathode Catalyst Layer in PEFC
Analysis Method of Oxygen Permeation Resistance of Ionomer in Cathode Catalyst Layer in PEFC
复制标题
PEFC阴极催化剂层离聚物的透氧性能分析方法
DOI：
10.1149/10909.0153ecst
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Kawase Motoaki
中科院分区：
文献类型：
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作者：
Ogawa Hikaru;Kageyama Miho;Gyoten Hisaaki;Kawase Motoaki
为了使氧气到达铂表面并与质子反应，氧气必须渗透过离聚物，离聚物是铂表面上的离子导电聚合物。离聚物的氧渗透阻力降低了电流密度。为了研究氧还原反应（ORR）速率的控制因素，应分析氧渗透阻力。在这项研究中，不是商业负载型催化剂，而是通过用离聚物涂覆铂板制备了铂狭缝催化剂，并测量了 ORR 率。为了确定氧渗透性，应用无量纲阴极等温一维模型。尽管我们已经报道了阴极催化剂层 (CCL) 的有效性因子是源自质量平衡的 4 个无量纲模量的函数，但引入了新的无量纲模量来定量评估氧渗透性。测定温度为80℃、入口相对湿度(RH)为0.76时的透氧率。
For oxygen to reach platinum surface and react with protons, oxygen has to permeate through ionomer which is ion conductive polymer on the platinum surface. The oxygen permeation resistance of ionomer lowers the current density. In order to investigate governing factors of oxygen reduction reaction (ORR) rate, the oxygen permeation resistance should be analyzed. In this study, instead of commercial supported catalyst, a platinum slits catalyst was prepared by coating the platinum slabs with ionomer and ORR rate was measured. In order to determine the oxygen permeance, a dimensionless cathode isothermal one-dimensional model was applied. Although we had reported that the effectiveness factor of cathode catalyst layer (CCL) was a function of 4 dimensionless moduli derived from mass balance, new dimensionless moduli to quantitatively evaluate the oxygen permeance were introduced. Oxygen permeance at the temperature of 80 C and inlet relative humidity (RH) of 0.76 was determined.