| 直接甲醇燃料电池双催化层阴极结构和性能 |
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| 引用本文： | 汪国雄,孙公权,王素力,王琪,孙海,毛庆,辛勤,衣宝廉.直接甲醇燃料电池双催化层阴极结构和性能[J].电源技术,2006,30(11):876-879. |
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| 作者姓名： | 汪国雄 孙公权 王素力 王琪 孙海 毛庆 辛勤 衣宝廉 |
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| 作者单位： | 中国科学院,大连化学物理研究所,辽宁,大连,116023;中国科学院,研究生院,北京,100039;中国科学院,大连化学物理研究所,辽宁,大连,116023 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 制备了直接甲醇燃料电池双催化层阴极,双催化层由内催化层Pt黑和外催化层40%Pt/C构成。接触角测试、扫描电镜(SEM)以及能谱(EDX)分析结果表明,在双催化层阴极结构中形成了憎水性、孔结构和催化剂浓度梯度分布。循环伏安测试结果表明双催化层具有较多的电化学活性表面积。该双催化层阴极结构有利于氧气扩散和水的排出,提高了电池性能。
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| 关 键 词： | 直接甲醇燃料电池 膜电极 双催化层阴极 梯度分布 |
| 文章编号： | 1002-087X(2006)11-0876-04 |
| 修稿时间： | 2006年5月25日 |
Structure and performance of the cathode with double-layered catalyst layer for direct methanol fuel cell |
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| WANG Guo-xiong,SUN Gong-quan,WANG Su-li,WANG Qi,SUN Hai,MAO Qing,XIN Qin,YI Bao-lian.Structure and performance of the cathode with double-layered catalyst layer for direct methanol fuel cell[J].Chinese Journal of Power Sources,2006,30(11):876-879. |
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| Authors: | WANG Guo-xiong SUN Gong-quan WANG Su-li WANG Qi SUN Hai MAO Qing XIN Qin YI Bao-lian |
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| Abstract: | A novel cathode with double-layered catalyst layer for direct methanol fuel cell (DMFC) was fabricated, which consisted of Pt black inner catalyst layer and 40% Pt/C outer catalyst layer. The double-layered catalyst layer was characterized by contact angle measurement,SEM and EDX analysis, in which formed a hydrophobic property,porosity and catalyst concentration gradient in the cathode. The cyclic voltammetry results showed that the double-layered catalyst layer had a greater electrochemical surface active area. The double-layered structure was beneficial for oxygen diffusion and water removal, and thus improved the DMFC performance. |
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| Keywords: | direct methanol fuel cell membrane electrode assembly cathode with double-layered catalyst layer gradient distribution |
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