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首页> 外文期刊>RSC Advances >Imidazolium-functionalized anion exchange membranes using poly(ether sulfone)s as macrocrosslinkers for fuel cells
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Imidazolium-functionalized anion exchange membranes using poly(ether sulfone)s as macrocrosslinkers for fuel cells

机译：使用聚醚砜作为燃料电池大分子交联剂的咪唑鎓官能化阴离子交换膜

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摘要

A series of novel macrocrosslinked imidazolium-based anion exchange membranes (AEMs) with high hydroxide conductivity and dimensional stability were synthesized by crosslinking a poly(vinyl imidazole) ionic liquid with bromide-terminated poly(ether sulfone) via Menshutkin reaction. Fourier transform infrared (FT-IR) and energy dispersive spectrometry (EDS) were used to confirm the chemical structure and successful crosslinking of the AEMs. The contiguous imidazolium cations along the polyolefin backbone are found to aggregate and connect to form continuous hydroxide transport microchannels by the introduction of long hydrophobic poly(ether sulfone) chain as evidenced by atomic force microscopy (AFM). As a consequence, a high hydroxide conductivity of 78.5 mS cm?1 was achieved for the crosslinked PES/PVIIL-0.4 membrane at 80 °C. A single cell test using the PES/PVIIL-0.4 membrane exhibits an open circuit voltage of 1.039 V and peak power density of 109.5 mW cm?2 at the current density of 190 mA cm?2 at 60 °C. This newly developed strategy holds great promise to prevent fuel crossover in alkaline fuel cells.
机译：通过使溴化端基聚醚砜与聚（乙烯基咪唑）离子液体交联，合成了一系列具有高氢氧化物电导率和尺寸稳定性的新型大分子交联的咪唑基阴离子交换膜（AEM）。门舒特金反应。傅里叶变换红外（FT-IR）和能量色散光谱（EDS）用于确认AEM的化学结构和成功交联。发现沿着聚烯烃主链的连续咪唑阳离子聚集并连接以形成连续的氢氧化物传输微通道，这是通过引入长疏水性聚醚砜链来实现的，如原子力显微镜（AFM）所证明。结果，在80℃下，交联的PES / PVIIL-0.4膜的氢氧化物电导率达到78.5mS·cm Δ1 。使用PES / PVIIL-0.4膜进行的单电池测试在电流密度为190时表现出1.039 V的开路电压和109.5 mW cm ？2 的峰值功率密度60°C时的mA cm ？2 。这项新开发的策略有望防止碱性燃料电池中的燃料交叉。

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