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用于 PEMFC 的新型吲唑和缩合吡唑双膦酸质子传导膜 Nafion 膜
Renewable Energy
(
IF
9.0
)
Pub Date : 2022-07-14
, DOI:
10.1016/j.renene.2022.07.054
Fátima C. Teixeira
,
António P.S. Teixeira
,
C.M. Rangel
在这项工作中,用于 PEMFC 的新型掺杂 Nafion 膜是通过将制备的吲唑和缩合吡唑双膦酸 (AzBPs) 的负载量为 1 wt% 进行浇铸来制备的。通过 ATR-FTIR 光谱分析新膜,并通过 SEM 检查其形态。评估了膜的吸水率和离子交换能力 (IEC),并估计了它们的水合数。通过电化学阻抗谱 (EIS) 在不同温度 (30、40、50 和 60 °C) 和相对湿度 (RH) (40、60 和 80%) 下评估改性膜的质子传导性能。所有膜的质子电导率随着温度和相对湿度的增加而增加。此外,所有掺杂 AzBPs 的新膜都表现出比 Nafion N-115 更高的质子电导率,用作参考并在相同的实验条件下进行测试,值高达 1.5 倍。结果表明,在 Nafion 膜上掺入 AzBPs 掺杂剂可增强整个改性膜的质子传导。对于以 AzBP1 作为掺杂剂的膜,观察到最佳的质子电导率,值为 94 mS cm-1 . 这些结果表明,掺杂吲唑和缩合吡唑双膦酸的 Nafion 膜是一种具有改善质子传导性的 PEMFC 新膜的有前景的方法。
"点击查看英文标题和摘要"
New proton conductive membranes of indazole- and condensed pyrazolebisphosphonic acid-Nafion membranes for PEMFC
In this work, new doped Nafion membranes for PEMFC are prepared by casting with 1 wt% loading of the prepared indazole- and condensed pyrazolebisphosphonic acids (AzBPs). The new membranes were analysed by ATR-FTIR spectroscopy and their morphology was examined by SEM. Membranes were evaluated for water uptake and ion exchange capacity (IEC), and their hydration number was estimated. The proton conduction properties of the modified membranes were evaluated by electrochemical impedance spectroscopy (EIS), at different temperatures (30, 40, 50 and 60 °C) and relative humidity (RH) (40, 60 and 80%). The proton conductivities of all membranes increase with increasing temperature and RH. Also, all new membranes doped with AzBPs exhibited higher proton conductivities than Nafion N-115, used as a reference and tested at the same experimental conditions, with values up to 1.5-fold. Results show that the incorporation of AzBPs dopants on Nafion membranes enhances the proton conduction throughout the modified membranes. The best proton conductivity was observed for membranes with AzBP1 as dopant, with a value of 94 mS cm-1. These results indicate that the Nafion membranes doped with indazole- and condensed pyrazolebisphosphonic acids are a promising approach for new membranes for PEMFC with improved proton conductivity.
更新日期:2022-07-15