Effects of microporous layer preparation on the performance of a direct methanol fuel cell
Effects of microporous layer preparation on the performance of a direct methanol fuel cell
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DOI：
10.1016/j.elecom.2007.11.033
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发表时间：
2008-02
影响因子：
5.4
通讯作者：
Caishun Lin;Tongtao Wang;F. Ye;Yong Fang;Xindong Wang
中科院分区：
文献类型：
--
作者：
Caishun Lin;Tongtao Wang;F. Ye;Yong Fang;Xindong Wang
研究了两种不同微孔层（MPL）制备方法（包括加热喷涂法和刮擦法）对直接甲醇燃料电池（DMFC）性能的影响。实验结果表明，采用新型MPL的电池比传统MPL具有更高的氧传质速率和更好的性能。扫描电子显微镜 (SEM) 图像显示，与传统 MPL 相比，新型 MPL 表面存在更多裂纹和空隙。阴极和阳极极化曲线表明，采用传统MPL的电池由于传质困难而降低了电池性能。电化学阻抗谱 (EIS) 分析进一步表明，采用新 MPL 的电池性能的提高归因于燃料电池系统中传质阻力降低而增强的氧传输。
The effects of two different microporous layer (MPL) preparation methods, including a heated-spraying method and a scraping method, on the performance of a direct methanol fuel cell (DMFC) were investigated. The experimental results indicated the cell with the new MPL had a higher mass transfer rate of oxygen and better performance than that of the conventional MPL. Scanning electron microscopy (SEM) images showed that there were more cracks and voids on the surface of the new MPL than that of the conventional MPL. The cathode and anode polarization curves exhibited that the cell with conventional MPL decreased the cell performance due to the difficulty for mass transport. Electrochemical impedance spectra (EIS) analysis further demonstrated that the improved performance of the cell with new MPL was attributed to the enhanced oxygen transport as the result of the reduced mass transfer resistance in the fuel cell system.