New anodic diffusive layer for passive micro-direct methanol fuel cell
New anodic diffusive layer for passive micro-direct methanol fuel cell
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用于被动微型直接甲醇燃料电池的新型阳极扩散层
DOI：
10.1016/j.jpowsour.2009.03.032
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发表时间：
2009-07-15
影响因子：
9.2
通讯作者：
Yang, Hui
中科院分区：
文献类型：
--
作者：
Yuan, Ting;Zou, Zhiqing;Yang, Hui
将碳纳米管(CNTs)添加到膜电极组件的阳极微孔层(MPL)中，显著提高了被动式微型直接甲醇燃料电池(DMFC)的性能。采用纯碳纳米管作为阳极MPL材料，在25℃左右的空气呼吸模式下，获得了约32.2 mW·cm(-1)的最大功率密度。对阳极的阻抗分析和循环伏安测试表明，在阳极多层膜电极中加入碳纳米管可以降低阳极反应的电荷转移阻力，提高催化剂的利用率，从而提高被动DMFC的性能。扫描电子显微镜测量表明，由于碳纳米管的一维结构，在MPL中形成了网络，这有利于甲醇的传质和催化剂利用率的提高。此外，被动DMFC运行300h后的耐久性测试表明，以碳纳米管为阳极的被动DMFC具有很好的稳定性。(C)2009爱思唯尔B.V.保留所有权利。
The addition of carbon nanotubes (CNTs) into anodic micro-porous layer (MPL) of the membrane electrode assembly significantly improves the performance of the passive micro-direct methanol fuel cells (DMFCs). The maximum power density of ca. 32.2 mW cm(-1) at a temperature of ca. 25 degrees C and under air-breathing mode is achieved with pure CNTs as anode MPL material. Impedance analysis and cyclic voltammetric measurements of the anodes indicate that the increased performance of the passive DMFC with the addition of CNTs into anodic MPLs could be attributed to the decrease in charge transfer resistance of the anode reaction and to the improvement in catalyst utilization. Scanning electron microscopy measurements show the network formation within the MPL due to the one-dimensional structure of CNTs, which could be beneficial to the methanol mass transfer and to the improvement in catalyst utilization. Furthermore, the durability test of a passive DMFC after 300 h operation demonstrates that the passive DMFC with CNTs as anode MPL materials exhibits very good stability. (C) 2009 Elsevier B.V. All rights reserved.