Durability of an Aromatic Block Copolymer Membrane in Practical PEFC Operation
Durability of an Aromatic Block Copolymer Membrane in Practical PEFC Operation
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芳香族嵌段共聚物膜在实际 PEFC 操作中的耐久性
DOI：
10.1016/j.elecom.2012.08.010
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
M. Watanabe
中科院分区：
文献类型：
--
作者：
T. Okanishi;T. Yoda;Y. Sakiyama;T. Miyahara;K. Miyatake;M. Uchida;M. Watanabe
在中温（80°C）、低湿度（53% RH）和低电流密度（0.02Acm−2）下，在聚合物电解质燃料电池中评估新型质子传导聚合物电解质膜——磺化聚二苯甲酮/聚（亚芳基醚）（SPK）嵌段共聚物的耐久性980小时。在测试过程中监测电化学性能和从阳极和阴极收集的废水，然后对膜进行测试后分析。与原始膜相比，测试后膜的核磁共振（NMR）谱和离子交换容量（IEC）值显示出非常微小的变化。测试后的膜保留了其原始重均分子量 (Mw)org 的 94%。测试后Qoxy（阴极催化剂的氧化物形成电荷）没有明显变化，这表明SPK膜的分解产物在阴极催化剂上的特异性吸附不显着。
The durability of a novel proton-conducting polymer electrolyte membrane, sulfonated polybenzophenone/poly (arylene ether) (SPK) block copolymer, was evaluated at middle temperature (80°C), low humidity (53% RH), and a low current density, 0.02Acm−2, in a polymer electrolyte fuel cell for 980h. The electrochemical properties and drain water collected from the anode and cathode were monitored during the test, followed by post-test analyses of the membrane. The nuclear magnetic resonance (NMR) spectra and ion exchange capacity (IEC) value of the post-test membrane showed very minor changes compared to those of the pristine one. The post-test membrane retained 94% of its original weight-averaged molecular weight (Mw)org. There was no remarkable change in Qoxide(oxide formation charge of the cathode catalyst) after the test, which indicates that the specific adsorption of decomposition products of the SPK membrane on the cathode catalyst was not significant.