With well-defined structure and high stability, covalent organic framework (COF) inspires the preparation of new ion-conducting materials for anion exchange membrane (AEM) in alkaline fuel cell. In order to reveal the influence of micro-nano structure within COF ordered channels on the hydroxide diffusion, we construct a multi-dimensional composite membrane by combining two-dimensional lamellar COF with one-dimensional polymer chains. The quaternary ammonium-modified COF-LZU1 (QAmCOF-LZU1) is incorporated into quaternized poly (2,6-dimethyl-1,4-phenylene oxide) (QAPPO) to fabricate QAmCOF-LZU1/PPO composite membranes. The rapidly diffusion of hydroxide ions in the first solvent shell formed by the huge amount of quaternary ammonium groups in the ordered COF channels is investigated by molecular dynamics simulations. Afterwards, sulfonated graphene oxide (GO) is coated on both surfaces of the membranes via ionic interactions and π-π interactions to obtain GO@QAmCOF-LZU1/PPO sandwich membranes, which would avoid excessive swelling of membranes and leakage of QA groups. Especially, the GO-sandwiched membrane exhibits strikingly high stabilities and excellent H₂/O₂ fuel cell performance with a peak power density of 242 mW cm⁻² at 60 °C. This study provides an effective strategy to construct ion-conducting COF-based composite membranes for high-performance alkaline fuel cell.

共价有机骨架（COF）具有明确的结构和高稳定性，激发了碱性燃料电池阴离子交换膜（AEM）新型离子导电材料的制备。为了揭示COF有序通道内的微纳米结构对氢氧化物扩散的影响，我们通过将二维层状COF与一维聚合物链相结合构建了多维复合膜。将季铵改性的 COF-LZU1 (QAmCOF-LZU1) 结合到季铵化聚 (2,6-二甲基-1,4-苯醚) (QAPPO) 中以制造 QAmCOF-LZU1/PPO 复合膜。通过分子动力学模拟研究了氢氧根离子在有序 COF 通道中大量季铵基团形成的第一溶剂壳中的快速扩散。然后，π-π相互作用获得 GO@QAmCOF-LZU1/PPO 夹心膜，这将避免膜过度膨胀和 QA 基团的泄漏。特别是，GO 夹心膜表现出惊人的高稳定性和优异的 H ₂ /O ₂燃料电池性能，在 60°C 时的峰值功率密度为 242 mW cm ^-2。该研究为构建用于高性能碱性燃料电池的离子导电COF基复合膜提供了一种有效的策略。