Dinda Indranil, Maiti Madhushri, Naskar Pappu, Banerjee Anjan
Department of Chemistry, Presidency University-Kolkata, Kolkata, 700073, India.
Chemphyschem. 2025 Aug 4;26(15):e202500251. doi: 10.1002/cphc.202500251. Epub 2025 Jul 13.
Conducting organic polymers are key components of flexible supercapacitors that power wearable devices and smart electronics. This work presents a flexible supercapacitor using Schiff base polymers (SBP) positive and poly-anthraquinone sulfides (PAQS) negative electrodes in aqueous Al(SO) electrolyte. The doping/dedoping of Al ions in the polymeric structure enables pseudoFaradaic charge storage. SBP and PAQS show respective specific capacitances of 1375 and 1166 mF g at 50 mA g, with >95% capacitance retention after 3000 cycles at 70 mA g. The 1.2 V flexible asymmetric pouch cell, utilizing low-cost stainless steel (SS304) current-collectors and electrolyte-soaked filter paper separators, exhibits a specific capacitance of 750 mF g at 50 mA g and retains 97% capacitance after 3000 cycles at 70 mA g. The supercapacitor demonstrates excellent power performance with a response time of 70 μs, achieving an energy density of 150 mWh kg at 30 W kg and a power density of 60 W kg at 83 mWh kg. Its electrochemical performance remains stable across flat, bent, and rolled states, highlighting its flexibility and mechanical stability. Beyond performance, the scalability, low cost, and environmental impact of the polymeric electrodes make this technology promising for next-generation flexible energy storage.
导电有机聚合物是为可穿戴设备和智能电子产品供电的柔性超级电容器的关键组件。这项工作展示了一种在水性Al(SO)电解质中使用席夫碱聚合物（SBP）正极和聚蒽醌硫化物（PAQS）负极的柔性超级电容器。聚合物结构中Al离子的掺杂/去掺杂实现了赝法拉第电荷存储。SBP和PAQS在50 mA g时的比电容分别为1375和1166 mF g，在70 mA g下循环3000次后电容保持率>95%。1.2 V柔性不对称软包电池采用低成本不锈钢（SS304）集流体和浸有电解质的滤纸隔膜，在50 mA g时的比电容为750 mF g，在70 mA g下循环3000次后电容保持97%。该超级电容器具有出色的功率性能，响应时间为70 μs，在30 W kg时能量密度达到150 mWh kg，在83 mWh kg时功率密度为60 W kg。其电化学性能在平坦、弯曲和卷曲状态下均保持稳定，突出了其灵活性和机械稳定性。除了性能之外，聚合物电极的可扩展性、低成本和环境影响使这项技术有望用于下一代柔性储能。
