Improvement of direct methanol fuel cell performance by modifying catalyst coated membrane structure
Data(s) |
01/10/2005
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Resumo |
A five-layer catalyst coated membrane (CCM) based upon Nation 115 membrane for direct methanol fuel cell (DMFC) was designed and fabricated by introducing a modified Nafion layer between the membrane and the catalyst layer. The properties of the CCM were determined by SEM, cyclic voltammetry, impedance spectroscopy, ruinous test and I-V curves. The characterizations show that the modified Nation layers provide increased interface contact area and enhanced interaction between the membrane and the catalyst layer. As a result, higher Pt utilization, lower contact resistance and superior durability of membrane electrode assembly was achieved. A 75% Pt utilization efficiency was obtained by using the novel CCM structure, whereas the conventional structure gave 60% efficiency. All these features greatly contribute to the increase in DMFC performance. The DMFC with new CCM structure presented a maximum power density of 260 MW cm(-2), but the DMFC with conventional structure gave only 200 mW cm(-2) under the same operation condition. (c) 2005 Elsevier B.V. All rights reserved. |
Identificador | |
Idioma(s) |
英语 |
Fonte |
王素力;孙公权;汪国雄;周震华;赵新生;孙海;樊小颖;衣宝廉;辛勤.Improvement of direct methanol fuel cell performance by modifying catalyst coated membrane structure,Electrochemistry Communications,2005,7():1007-1012 |
Palavras-Chave | #direct methanol fuel cell #catalyst coated membrane #Pt utilization #membrane electrode assembly #interface between membrane and catalyst layer |
Tipo |
期刊论文 |