Test on the degradation of direct methanol fuel cell
Test on the degradation of direct methanol fuel cell
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DOI：
10.1016/j.electacta.2005.07.016
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发表时间：
2006-02
影响因子：
6.6
通讯作者：
Weimin Chen;Gongquan Sun;Junsong Guo;Xinsheng Zhao;Shiyou Yan;Juan Tian;Shuihua Tang;Zhen-hua Zhou-Zh
中科院分区：
文献类型：
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作者：
Weimin Chen;Gongquan Sun;Junsong Guo;Xinsheng Zhao;Shiyou Yan;Juan Tian;Shuihua Tang;Zhen-hua Zhou-Zh
对直接甲醇燃料电池（DMFC）进行了500h寿命试验。x射线衍射（XRD）和透射电子显微镜（TEM）结果表明，经过寿命试验后，电催化剂的阳极和阴极的粒径均有所增大，且阴极的增大程度更高。采用co汽提法和氢脱附法分别对阳极和阴极催化剂的电化学面积进行了评价。结果表明，由于电催化剂颗粒的烧结，ECA损失高于SSA损失（由XRD测定）。能量色散x射线分析（EDX）显示了电池中钌从阳极侧到阴极侧的交叉。
A 500h life-test of direct methanol fuel cell (DMFC) was conducted in a single cell. X-ray diffraction (XRD) and transmission electron microscopy (TEM) images showed that after life-test, the particle size of electrocatalysts increased both in anode and cathode, and the degree is higher in cathode. Electrochemical areas (ECAs) of anode and cathode catalyst were evaluated by CO-stripping and hydrogen-desorption test, respectively. It was found that the ECA loss is higher than the specific surface area (SSA) loss (determined by XRD) that merely due to the sintering of the electrocatalyst particles. Energy dispersive X-ray analysis (EDX) revealed a crossover of ruthenium from the anode side to the cathode side in the cell.