物理化学学报2026，Vol.42Issue(11)：1-24,24.DOI:10.1016/j.actphy.2026.100363
钾离子电池聚合物正极:储能机制与优化策略
Energy storage mechanisms and optimization strategies of polymer cathodes for potassium-ion batteries
摘要
Abstract
Polymer cathodes have attracted growing interest for potassium-ion batteries(PIBs)due to their tunable molecular structures,abundant redox-active sites,and sustainable elemental compositions.Compared with inorganic intercalation-type cathodes,polymer cathodes typically store charge through reversible redox reactions between K+ions or electrolyte anions and organic functional groups,including carbonyl,imide,quinone,azo,imine,and nitrogen-containing heterocyclic units.Their electrochemical performance is governed not only by the intrinsic redox chemistry of the active sites,but also by the polymer backbone configuration,π-conjugation degree,aggregation behavior,pore structure,and the stability of the electrode/electrolyte interface.This review summarizes recent progress in polymer cathodes for PIBs,with a focus on potassium-storage mechanisms and structural optimization strategies.Representative mechanisms,such as carbonyl coordination,imide chelation,multielectron redox processes,bipolar charge compensation,and pseudocapacitive behavior,are discussed from the perspectives of molecular structure,ion-electrode interactions,and charge-transfer kinetics.In addition,the ion-specific differences among K+,Li+,and Na+are analyzed in terms of solvation/desolvation behavior,local coordination environments,and redox-site utilization.Key optimization strategies,including polymerization-degree control,rigid π-conjugated backbone design,porous or three-dimensional network construction,conductive compositing,and electrolyte matching,are highlighted.Finally,the remaining challenges and future research directions are discussed to guide the rational design of high-performance polymer cathodes for PIBs.关键词
钾离子电池/聚合物正极/储能机制/优化策略Key words
Potassium-ion battery/Polymer cathode/Energy storage mechanism/Optimization strategy分类
化学化工引用本文复制引用
周驰,袁泽宇,胡志斌,吴亚群,段丽平,杜忆忱,周小四..钾离子电池聚合物正极:储能机制与优化策略[J].物理化学学报,2026,42(11):1-24,24.基金项目
国家自然科学基金(22479078和22179063)资助项目. （22479078和22179063）
