Solid‐State Alkaline Fuel Cell Performance of Pentablock Terpolymer with Methylpyrrolidinium Cations as Anion Exchange Membrane and Ionomer
Solid‐State Alkaline Fuel Cell Performance of Pentablock Terpolymer with Methylpyrrolidinium Cations as Anion Exchange Membrane and Ionomer
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DOI：
10.1002/fuce.202000092
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发表时间：
2020-10
期刊：
影响因子：
2.8
通讯作者：
M. Hwang;Rui Sun;C. Willis;Y. Elabd
中科院分区：
文献类型：
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作者：
M. Hwang;Rui Sun;C. Willis;Y. Elabd
在本研究中，我们将甲基吡咯烷阳离子五嵌段共聚物作为固体碱性燃料电池的阴离子交换膜和离聚体进行了表征和研究。在30°C、100%相对湿度(RH)下，五嵌段共聚物(含甲基吡咯烷阳离子)膜比商用Fuma-Tech(含季铵盐阳离子)膜表现出更高的燃料电池功率密度和耐久性。研究了以五嵌段共聚物为膜和离聚体的膜电极组件(MEAs)的催化剂墨水组成(即固溶比)和燃料电池性能的优化。燃料电池运行条件的优化与现场电化学阻抗谱结果相吻合。在40°C、100%RH下工作100h后，五块共聚物MEA的最大功率密度为83.3mW cm−2，电压衰减率为0.7mVh−1。这些结果表明，含甲基吡咯烷阳离子的五嵌段化合物有望成为一种具有商业吸引力的低成本固体碱性燃料电池替代阴离子交换膜和离聚体。
In this study, pentablock terpolymers with methylpyrrolidinium cations were characterized and investigated as anion exchange membranes and ionomers for solid‐state alkaline fuel cells. The pentablock terpolymer (with methylpyrrolidinium cations) membranes exhibited higher fuel cell power density and durability than commercial FuMA‐Tech (with quaternary ammonium cations) membranes at 30 °C, 100% relative humidity (RH). Optimization of the catalyst ink composition (i.e., solids and solvent ratio) and fuel cell performance of membrane electrode assemblies (MEAs) with pentablock terpolymers as both the membrane and ionomer were also investigated. Optimization of the fuel cell operating conditions corroborates with the in situ electrochemical impedance spectroscopy results. The pentablock terpolymer MEA exhibited a maximum power density of 83.3 mW cm−2 and voltage decay rate of 0.7 mV h−1 after 100 h of operation under 40 °C, 100% RH. These results show promise for pentablock terptolymers with methylpyrrolidinium cations as a commercially attractive low‐cost alternative anion exchange membrane and ionomer for solid‐state alkaline fuel cells.