摘要
研究了金属离子对质子交换膜燃料电池(PEMFC)性能的影响。通过将质子交换膜、电极催化层、扩散层(GDL)在模拟电池生成水的离子溶液(Ca2+、Mg2+、Na+)中浸泡不同的时间,考察了NafionNRE-212膜和催化层中氢离子含量、扩散层的接触角,并通过组装电池比较了处理不同时间的膜、催化层压制成电极后的膜电极性能。结合循环伏安技术分析了金属离子对电极催化层的影响。实验结果表明随着浸泡时间的增加,膜中和催化层中氢离子的浓度都逐渐下降,当膜中H+浓度降为原来的20%以下时,电池几乎不能放电;而催化层中下降为原来的27%时,电极性能却下降不大。说明在相同浓度的金属离子溶液中,催化层中氢离子受金属离子污染程度比膜受污染程度小。
Influence of the metal ions on the performance of proton exchange membrane fuel cell was studied. After proton exchange membrane, electrode catalyst layer, gas diffusion layer were soaked in metal ionic water solution （Ca^2＋, Mg^2＋, Na^＋） for different times, hydrogen ion contents in Nation NRE-212 membrane and catalyst layer, the contact angles of GDL were measured. The performance of electrodes with different soaking-times was compared, and combined by cycle voltammograms technology. The results show that the H^＋ concentration in the membrane and catalyst layer decreases with the increase of soaking-time. When the concentration of H^＋ in membrane reduces to lower than 20% original one, the cell with this membrane can hardly be discharged; however, in the catalyst layer when the concentration of H^＋ reduced to 27%, the cell performance changes slightly. It shows that, in the same concentration of metal ions solution, the degradation of PEMFC performance caused by the contaminated membrane is more serious than that caused by contaminated catalyst layer.
出处
《电源技术》
CAS
CSCD
北大核心
2007年第3期205-208,共4页
Chinese Journal of Power Sources
关键词
质子交换膜燃料电池
金属离子污染
膜电极
性能衰减
proton exchange membrane fuel cell
cationic contaminants
membrane electrode assembly （MEA）
performance degradation
作者简介
王磊磊（1981-）。女。河北省人。硕士生。主要研究方向为质子交换膜燃料电池。
联系人：邵志刚
