Cell performances of direct methanol fuel cells with grafted membranes
Cell performances of direct methanol fuel cells with grafted membranes
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接枝膜直接甲醇燃料电池的电池性能
DOI：
10.1016/s0016-2361(02)00164-3
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
K. Kawahara
中科院分区：
文献类型：
--
作者：
T. Hatanaka;Naoki Hasegawa;A. Kamiya;M. Kawasumi;Y. Morimoto;K. Kawahara
使用接枝聚合物膜作为直接甲醇燃料电池（DMFC）的电解质评估电池性能。该膜是使用聚（乙烯-四氟乙烯）或 ETFE 薄膜制备的。使用γ-辐射激活接枝技术将磺酸基团添加到基础聚合物膜上作为离子交换基团。这些膜具有更适合DMFC的特性，即比全氟离聚物膜（Nafion）更高的电导率和更低的甲醇渗透性。然而，接枝膜的电池性能不如 Nafion 的电池性能。电极电势与可逆氢电极的分析表明，接枝膜上的两个电极都具有较大的活化过电势。我们得出的结论是，这是由于催化剂层与接枝膜的结合不良造成的。
Cell performances were evaluated with grafted polymer membranes as an electrolyte for a direct methanol fuel cell (DMFC). The membranes were prepared using a poly(ethylene-tetrafluoroethylene), or ETFE, film. The base polymer film was added to sulfonic groups using γ-radiation activated grafting technique as ion-exchange groups. These membranes had more suitable properties for DMFCs, i.e. higher electric conductivity and lower methanol permeability than perfluorinated ionomer membrane (Nafion). Nevertheless, the cell performance with the grafted membrane was inferior to that with Nafion. The analysis of electrode potentials vs. reversible hydrogen electrode showed larger activation overpotential for both the electrodes on the grafted membranes. We concluded that this is due to poor bonding of the catalyst layers to the grafted membranes.