不同流场下进气对质子交换膜燃料电池性能的影响

Effect of Inlet gases on Performance of PEMFC Using Different Flow Fields

流场的结构对于质子交换膜燃料电池(PEMFC)的水管理和气体的传递具有十分重要的影响,相关研究一直是燃料电池的研究热点与重点。本文以纯氧气和空气作为阴极氧化剂,通过电池的性能测试、极化曲线和电化学阻抗分析等原位实验,分析了气体的流动与传输、不同流场下的电流密度、入口反应气体浓度等条件对电池性能的影响。实验结果表明,提高氧气浓度可以获得更好的质子交换膜燃料电池性能和最小化活化损失,纯氧气、波状流场的使用效果随进气量的变化而有明显的变化。

Flow field structure plays a vital role in water management and gas distribution within the proton exchange membrane fuel cell(PEMFC)and has always been the focus of fuel cell research.In-situ experiments are carried out using pure oxygen and air as cathode oxidants,performance tests.polarization curves,electrochemical impedance analysis,gas flow and transfer,the current density for different flow fields,and the influence of inlet reactant gases are briefly analyzed.The experimental results reveal that increasing oxygen concentration greatly influenced the PEMFC performance and minimized the activation losses.