不同铂碳比下PEMFC梯度阴极催化层性能数值模拟  

NUMERICAL SIMULATION ON PERFORMANCE OF PEMFC WITH GRADIENT CATHODE CATALYST LAYER AT DIFFERENT Pt/C RATIOS

作　　者：程友良[1,2] 丁瑞 毛绍宽 樊小朝 Cheng Youliang;Ding Rui;Mao Shaokuan;Fan Xiaochao(Department of Power Engineering,North China Electric Power University,Baoding 071003,China;Hebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology,North China Electric Power University,Baoding 071003,China;School of Energy Engineering,Xinjiang Institute of Engineering,Urumqi 830023,China)

机构地区：[1]华北电力大学动力工程系,保定071003 [2]华北电力大学河北省低碳高效发电技术重点实验室,保定071003 [3]新疆工程学院能源工程学院,乌鲁木齐830023

出　　处：《太阳能学报》2024年第11期738-746,共9页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(52266018);新疆工程学院博士启动金项目(2023XGYBQJ01);新疆天山英才青年科技拔尖人才项目(2022TSYCCX0051)。

摘　　要：建立耦合团聚物模型的二维、两相、非等温的质子交换膜燃料电池(PEMFC)模型,研究在不同铂碳比(Pt/C比)下,阴极催化层(CCL)梯度设计对燃料电池性能的影响。结果表明,当Pt/C比为0.6时,铂载量梯度设计能增强燃料电池性能,但当Pt/C比为0.3时会削弱其性能。而对于铂载量和电解质含量梯度设计,随着Pt/C比降低到0.3,该设计有更低的氧局部传输阻力,使其氧气供应更充足、浓差损失减少、氧饥饿现象消失,从而实现电流密度增幅进一步增大。A two-dimensional,two-phase,non-isothermal proton exchange membrane fuel cell(PEMFC)model coupled with agglomerate model is established to study the influence of gradient design of cathode catalyst layer(CCL)on the fuel cell performance at different Pt/C ratios.The research results indicate that when the Pt/C ratio is 0.6,the gradient Pt loading design could enhance the fuel cell performance while weaking the fuel cell performance as the Pt/C ratio is 0.3.For the gradient CCL designs of Pt loading and ionomer content,as the Pt/C ratio decreases to 0.3,the designs have less local oxygen transfer resistance,resulting in a sufficient oxygen supply,reduced concentration loss,and the disappearance of oxygen starvation phenomenon,thereby achieving more increase in current density.

关 键 词：质子交换膜燃料电池 数值模拟 传质 梯度阴极催化层 铂碳比 氧饥饿 

分 类 号：TM911.48[电气工程—电力电子与电力传动]