Abstract Aqueous ammonium dual-ion batteries (ADIBs), especially those integrating organic electroactive materials and functioning in a mild electrolyte of ammonium sulfate solution, have attracted increasing attentions in the stationary electrochemical storage area due to their inherent safety, sustainability, and environmental friendliness features. Herein, a flexible electroactive polyimide/nitrogen-doped carbon/carbon nanotubes (PI/NDC/CNT) composite nanofiber membrane with highly interconnected conductive porous structure is prepared through electrospinning and in-situ pyrolysis/imidization treatments for ADIB applications. The electroactive PI achieves uniform distribution, high utilization and ultrafast reaction kinetics within PI/NDC/CNT electrode. As a result, the PI/NDC/CNT electrode exhibits high reversible capacity of 161 mA h g−1 at 0.5 A g−1, good rate capability, and satisfying capacity retention over 87.9% after 5000 cycles. Besides, an all-organic aqueous ADIB using PI/NDC/CNT and polyaniline/carbon nanofiber composites as anode and cathode respectively, achieves ultralong cycle stability and high energy density of 114.3 W h kg−1.

中文翻译：

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用于全有机水铵双离子电池的高多孔电活性聚酰亚胺基纳米纤维复合负极

摘要 水铵双离子电池（ADIBs），特别是那些集成有机电活性材料并在硫酸铵溶液的温和电解质中发挥作用的电池，由于其固有的安全性、可持续性和环境友好性，在固定式电化学存储领域受到越来越多的关注。 . 在此，通过静电纺丝和原位热解/酰亚胺化处理制备了具有高度互连导电多孔结构的柔性电活性聚酰亚胺/氮掺杂碳/碳纳米管（PI/NDC/CNT）复合纳米纤维膜，用于 ADIB 应用。电活性 PI 在 PI/NDC/CNT 电极内实现均匀分布、高利用率和超快反应动力学。因此，PI/NDC/CNT 电极在 0 时表现出 161 mA h g-1 的高可逆容量。5 A g-1，良好的倍率性能，5000次循环后容量保持率超过87.9%。此外，分别使用PI/NDC/CNT和聚苯胺/碳纳米纤维复合材料作为阳极和阴极的全有机水性ADIB实现了超长循环稳定性和114.3 W h kg-1的高能量密度。