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>Toward Scalable Production: Catalyst‐Coated Membranes (CCMs) for Anion‐Exchange Membrane Water Electrolysis via Direct Bar Coating
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Toward Scalable Production: Catalyst‐Coated Membranes (CCMs) for Anion‐Exchange Membrane Water Electrolysis via Direct Bar Coating
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机译：Toward Scalable Production: Catalyst‐Coated Membranes (CCMs) for Anion‐Exchange Membrane Water Electrolysis via Direct Bar Coating
Abstract Direct catalyst coating of membranes is an obvious membrane‐electrode assembly (MEA) fabrication approach. Nevertheless, it bears significant challenges related to excessive swelling of the wetted membranes and catalyst layers during coating. Thermal decaling, which is currently used in proton exchange electrolysis, cannot be used with typical hydrocarbon‐based anion‐exchange membranes due to the lack of a glass transition point. In this work, a novel direct‐coating approach for MEAs for anion‐exchange membrane water electrolysis is proposed. An additional adhesive foil is used to minimize membrane swelling during the coating of the second catalyst layer. The resulting cell efficiency (1 A cm−2 at 1.8 V with ≥ 1.9 mgIr cm−2) is comparable to spray‐coated cells, while the mass transport is reduced at higher current densities (2.11 V vs 2.27 V at 2.7 A cm−2). A fully self‐casted catalyst‐coated membrane with low thickness (35 µm) achieves promising performance of 1.4 A cm−2 at 1.8 V in 0.1 m KOH and 2.0 A cm−2 in 1 m KOH. Constant current holds at 1 A cm−2 in 1 m KOH further shows a comparably low degradation rate of both spray‐ and bar‐coated cells (≈1 mV h−1) after a stabilization period.
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机译：抽象的直接催化剂涂层膜一个明显的膜电极装置(MEA)制造方法。重大挑战与过度有关肿胀的湿膜和催化剂在涂料层。目前用于质子交换电解,不能用于典型烃量的基础阴离子交换膜由于缺乏玻璃化转变点。直接检测涂层方法的量阴离子交换膜电解水建议。减少膜肿胀的涂料中第二催化剂层。效率在1.8 V(1厘米−2 mgIr≥1.9厘米−2)与喷量涂细胞大众运输减少在更高的电流密度(2.11 V和2.27 V 2.7厘米−2)。完全自我检测铸涂膜与催化剂低厚度(35µm)实现承诺1.4厘米−2的性能在0.1 KOH 1.8 V和2.0厘米−2在1 m KOH。在1米1厘米−2 KOH进一步显示了一个相对降解率低的喷雾量酒吧还是涂细胞(≈1 mV h−1)后稳定时间。
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