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研究论文

直接甲醇燃料电池催化活性层的优化

  • 张军 ,
  • 李磊 ,
  • 许莉 ,
  • 王宇新
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  • 天津大学化工学院,天津大学化工学院,天津大学化工学院,天津大学化工学院 天津300072 ,天津300072 ,天津300072 ,天津300072

收稿日期: 2002-08-28

  修回日期: 2002-08-28

  网络出版日期: 2002-08-28

Optimum of Catalyst Layers for Direct Methanol Fuel Cells

  • ZHANG Jun ,
  • Li Lei ,
  • XU Li ,
  • WAN Yu_xin
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  • (School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China

Received date: 2002-08-28

  Revised date: 2002-08-28

  Online published: 2002-08-28

摘要

本文考察了直接甲醇燃料电池 (DMFC)不同催化剂载量的膜电极性能 .对催化剂层中Nafion含量进行优化 ,研究了Nafion含量对电池的阻抗的影响 .实验发现 :DMFC适宜的阳极Pt_Ru/C载量为Pt 4mg/cm2 、Nafion质量百分含量为 2 1.4 % ;高电流密度下 ,阴极Pt/C载量为Pt4mg/cm2 、Nafion质量百分含量为 2 1.4 %时 ,有较好的放电性能 ,继续增加Nafion含量 ,阴极的欧姆极化和浓差极化增大 ,电池性能下降

本文引用格式

张军 , 李磊 , 许莉 , 王宇新 . 直接甲醇燃料电池催化活性层的优化[J]. 电化学, 2002 , 8(3) : 315 -320 . DOI: 10.61558/2993-074X.3299

Abstract

The performances of membrane electrode assemblies (MEAs)with various Pt loading were compared.The amount of Nafion in a catalytic layer was optimized,and the effect of Nafion loading on the resistance of MEAs was investigated with ac impedance spectroscopy.For a MEA with both Pt 4 mg/cm 2 in the anode and the cathode,suitable Nafion loading was 21.4 wt% in the anode.With 21.4 wt% Nafion loading in the cathode,the Direct Methanol Fuel Cells(DMFC) showed the highest performance at high current density.While,the DMFC performances came down,as Nafion loading increasing,for ohm and concentration polarization.

参考文献

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