Optimal pore shape in a low-Pt PEM fuel cell cathode catalyst layer

被引：0
|
作者：
Kulikovsky, Andrei [1 ,2 ]
机构：
[1] Forschungszentrum Julich, Inst Energy & Climate Res, Theory & Computat Energy Mat IEK 13, Julich, Germany
[2] Lomonosov Moscow State Univ, Res Comp Ctr, Moscow, Russia
来源：
ELECTROCHEMICAL SCIENCE ADVANCES | 2024年 / 4卷 / 04期
关键词：
low-Pt loading; modeling; oxygen transport; PEM fuel cell;
D O I：
10.1002/elsa.202300021
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A model for performance of an axially symmetric pore with the curved generatrix is developed. Oxygen transport along the pore axis and in the radial direction through a thin ionomer film separating the pore volume from the Pt/C surface is taken into account. A performance functional is formulated, and the Euler-Lagrange equation is solved numerically for an optimal pore shape. This shape is close to a cubic paraboloid converging toward the membrane. Polarization curves show superior performance of the optimal pore over the cylindrical pore of the same active (side) surface area. The results suggest the shape of optimal ionomer loading for low-Pt electrodes.
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页数：6
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