Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10267446 | Electrochemistry Communications | 2005 | 6 Pages |
Abstract
A five-layer catalyst coated membrane (CCM) based upon Nafion 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 Nafion 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 260Â mWÂ cmâ2, but the DMFC with conventional structure gave only 200Â mWÂ cmâ2 under the same operation condition.
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Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Suli Wang, Gongquan Sun, Guoxiong Wang, Zhenhua Zhou, Xinsheng Zhao, Hai Sun, Xiaoying Fan, Baolian Yi, Qin Xin,