摘要
该文以质子交换膜燃料电池(proton exchange membrane fuel cell,PEMFC)单电池为研究对象,研究不同的氢氧饥饿程度条件下,PEMFC单电池极化曲线、功率密度和高频阻抗的变化。该研究结果表明,氧饥饿对PEMFC单电池性能有显著影响,减小空气过量系数,极化曲线下降速率加快,最大功率密度减小,单电池性能衰减加快;而氢饥饿对PEMFC单电池几乎无影响,只有当氢气过量系数降至1.1时,PEMFC单电池的输出性能略有提高;阴阳极侧的交流阻抗随着气体过量系数的减小均表现为增加的趋势。
The single cell of the proton exchange membrane fuel cell was studied. This paper respectively studied variation of single PEMFC the polarization curve,power density and electrochemical impedance spectroscopy under the different hydrogen starvation and oxygen starvation. Research results showed that the oxygen starvation has a significant effect on the performance of single PEMFC. When the air stoichiometry is small,the polarization curve is decrease rapidly and the maximum power density decrease with the output current increasing,meanwhile the performance of the single cell decays. The effect of hydrogen starvation plays a slight role in behavior of single PEMFC. Only when the hydrogen starvation drops to 1.1,the performance of single PEMFC improves slightly,especially in the case of large current. The electrochemical impedance spectroscopy of cathode and anode show an increasing trend with the decreasing of the gas stoichiometry.
作者
何丽
刘优贤
冯坤
伍翔
刘志祥
He Li;Liu Youxian;Feng Kun;Wu Xiang;Liu Zhixiang(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,China;Foshan(Yunfu)Research Institute for Hydrogen Energy Industry and New Material Development,Foshan University)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2019年第8期2383-2388,共6页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51677157)
关键词
PEMFC单电池
氧饥饿
氢饥饿
极化曲线
功率密度
电化学阻抗谱(EIS)
PEMFC single cell
oxygen starvation
hydrogen starvation
polarization curve
power density
electrochemical impedance spectroscopy(EIS)
