高等学校化学学报 ›› 2005, Vol. 26 ›› Issue (3): 531.

• 研究论文 • 上一篇    下一篇

平整层对PEM燃料电池自增湿性能的影响

王诚, 毛宗强, 徐景明, 谢晓峰, 杨立寨   

  1. 清华大学核能与新能源技术研究院, 北京 100084
  • 收稿日期:2004-03-12 出版日期:2005-03-10 发布日期:2005-03-10
  • 通讯作者: 王 诚(1974年出生),男,博士,从事氢能及绿色电化学系统研究.E-mail:wangcheng@mai.ltsinghua.edu.cn E-mail:wangcheng@mai.ltsinghua.edu.cn
  • 基金资助:

    国家“九七三”氢能领域项目(批准号:G2000026410)资助.

Influence of Sub-layer on SelF-humidifying Performance of PEMFC

WANG Cheng, MAO Zong-Qiang, XU Jing-Ming, XIE Xiao-Feng, YANG Li-Zhai   

  1. Institute of Nuclear Energy and New Energy Technology, Tsinghua University, Beijing 100084, China
  • Received:2004-03-12 Online:2005-03-10 Published:2005-03-10

摘要: 制备了不同聚四氟乙烯(PTFE)含量与不同碳载量的电极平整层,经过相同的膜电极成型工艺处理后,组装成单电池进行极化曲线与交流阻抗分析,发现平整层中的聚四氟乙烯含量从24%增到35%时,H2/O2型燃料电池自增湿发电最高功率密度增长了0.1W/cm2,但当聚四氟乙烯含量增大到42%时,电性能略有下降;然而H2/Air型燃料电池自增湿发电性能却随着聚四氟乙烯含量增大而提高.平整层载量对自增湿发电影响较大,平整层载量为4.0mg/cm2的膜电极与无平整层的膜电极在H2/O2自增湿操作下相比,最高功率密度提高约0.27W/cm2.通过压汞仪与扫描电镜(SEM)对平整层的物化性能进行了结构分析.

关键词: 燃料电池, 质子交换膜, 自增湿, 电极, 平整层

Abstract: To research the effect of sub-layer on selF-humidifying performance of PEMFC, the membrane electrode assemblies with different PTFE contents and different loading amount of PTFE/C mixture in sub-layer were prepared, and then single PEMFCs were assembled for experimental studies of polarization and AC impedance. The results indicated that the peak power density of H2/O2 PEMFC was improved about 0.1 W/cm2 when PTFE content in sub-layer increased from 24% to 35%, but its peak power density decreased with PTFE content up to 42%. However, the selF-humidifying performance of H2/air PEMFC increased all along. The loading amount of sub-layer had an important influence on selF-humidifying performance of PEMFC, the peak power density of H2/O2 PEMFC was improved about 0.27 W/cm2 when sub-layer loading amount increased from 0 to 4.0 mg/cm2. Finally, the microstructures of the sub-layer were analyzed by the methods of intrusion Hg measurement and SEM.

Key words: Fuel cell, Proton exchange membrane, SelF-humidifying, Electrode, Sub-layer

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