Bicontinuous porous materials, which possess 3D interconnected pore channels facilitating a smooth mass transport, have attracted much interest in the fields of energy and catalysis. However, their synthesis remains very challenging. We report a general approach, using polymer cubosomes as the template, for the controllable synthesis of bicontinuous porous polymers with an ordered single primitive (SP) cubic structure, including polypyrrole (SP-PPy), poly-m-phenylenediamine (SP-PmPD), and polydopamine (SP-PDA). Specifically, the resultant SP-PPy had a unit cell parameter of 99 nm, pore diameter of 45 nm, and specific surface area of approximately 60 m²·g^–1. As a proof of concept, the I₂-adsorbed SP-PPy was employed as the cathode materials of newly emerged Na–I₂ batteries, which delivered a record-high specific capacity (235 mA·h·g^–1 at 0.5 C), excellent rate capability, and cycling stability (with a low capacity decay of 0.12% per cycle within 400 cycles at 1 C). The advantageous contributions of the bicontinuous structure and I₃^– adsorption mechanism of SP-PPy were revealed by a combination of ion diffusion experiments and theoretical calculations. This study opens a new avenue for the synthesis of porous polymers with new topologies, broadens the spectrum of bicontinuous-structured materials, and also develops a novel potential application for porous polymers.

中文翻译：

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具有有序单基元双连续结构的多孔聚合物立方体及其钠碘电池

双连续多孔材料具有 3D 相互连接的孔通道，促进了平稳的质量传输，在能源和催化领域引起了极大的兴趣。然而，它们的合成仍然非常具有挑战性。我们报告了一种使用聚合物立方体作为模板的通用方法，用于可控合成具有有序单基元 (SP) 立方结构的双连续多孔聚合物，包括聚吡咯 (SP-PPy)、聚间苯二胺 (SP-PmPD)和聚多巴胺 (SP-PDA)。具体而言，所得SP-PPy的晶胞参数为99nm，孔径为45nm，比表面积约为60m ² ·g ^-1。作为概念证明，I ₂-吸附的SP-PPy被用作新兴Na-I ₂电池的正极材料，具有创纪录的比容量（235 mA·h·g ^–1 at 0.5 C）、优异的倍率性能和循环稳定性（在 1 C 下 400 次循环内每个循环的容量衰减低 0.12%）。通过离子扩散实验和理论计算相结合，揭示了双连续结构和 I ₃ ^{- SP-PPy 吸附机制的有利贡献。}该研究为合成具有新拓扑结构的多孔聚合物开辟了一条新途径，拓宽了双连续结构材料的范围，并为多孔聚合物开发了一种新的潜在应用。