Simulation of Sphere-Microstructure Model of the Catalyst Layer in a PEMFC

ZHANG Jie-Jing, 吉林农业大学生命科学学院, 长春 130118;,School of Life Sciences, Jilin Agricultural University, Changchun 130118, P. R. China;, WANG Yu-Xin, XU Li, 天津大学化工学院, 化学工程联合国家重点实验室, 天津 300072,State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China
2015 Wuli huaxue xuebao  
The catalyst layer in a proton-exchange-membrane fuel cell (PEMFC) was simulated based on a sphere-microstructure model that consisted of Pt/C particles and a mixed ionomer-pore phase. Pt/C particles were randomly distributed in the model and were treated as spheres with a normal distribution of their size assumed. Transport and electrochemical reactions in the model catalyst layer were calculated. The variation of oxygen level, overpotential, reaction rate, and cell current through the
more » ... through the catalyst layer was discussed in relation to changes in electrode thickness and Pt/C particle size. The corresponding polarization curves were also analyzed. Through this analysis, optimal values for electrode thickness and particle size were achieved.
doi:10.3866/pku.whxb201501221 fatcat:kgd62zjybrab3axom3fdbro4cu