Porous bipolar polymers as organic cathodes for sustainable sodium/potassium-ion batteries
Porous bipolar polymers as organic cathodes for sustainable sodium/potassium-ion batteries
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多孔双极聚合物作为可持续钠/钾离子电池的有机阴极
DOI：
10.1039/d3ta02445h
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发表时间：
2023
影响因子：
11.9
通讯作者：
Luo, Chao
中科院分区：
文献类型：
--
作者：
Mohammadiroudbari, Motahareh;Huang, Jinghao;Kim, Eric Youngsam;Yang, Zhenzhen;Chen, Fu;Luo, Chao
氧化还原活性多孔聚合物因其孔径可调、化学结构灵活、热稳定性高等优点而成为碱离子电池极有前途的有机电极材料。本工作介绍了各种多孔双极聚合物作为阴极的钠离子电池（NIB）和钾离子电池（KIB）。通过N，N，N′，N′-四（4-氨基苯基）-1，4-苯二胺（TAP）与各种二酐的缩聚反应，在聚合物的重复单元中引入了两个分别含有羰基和胺活性中心的结构单元。所得的双极性聚合物在电池充电和放电期间经历涉及阳离子和阴离子的多电子氧化还原反应。通过调节二酐单体的共轭结构，研究了共轭结构和孔隙率对电化学性能的影响。具有扩展共轭结构和小孔径的双极性聚合物在NIB和KIB中表现出上级的电化学性能，包括高氧化还原电位、长循环寿命和快速充电能力，显示出作为碱离子电池有机阴极材料的巨大前景。
Redox-active porous polymers are becoming promising organic electrode materials for alkali-ion batteries because of their tunable pore size, flexible chemical structure, and high thermal stability. This work presents various porous bipolar polymers as cathodes in Na-ion batteries (NIBs) and K-ion batteries (KIBs). Two structural units containing carbonyl and amine active centers, respectively, were introduced into the repeating units of the polymers by the polycondensation of N,N,N′,N′-tetrakis(4-aminophenyl)-1,4-phenylenediamine (TAP) and various dianhydrides. The resulting bipolar polymers undergo multi-electron redox reactions involving both cations and anions during battery charge and discharge. The impacts of extended conjugation structures and porosity on the electrochemical performances were investigated by tuning the conjugation structures in the dianhydride monomers. The bipolar polymers with extended conjugation structures and small pore size exhibit superior electrochemical performance in NIBs and KIBs in terms of high redox potentials, long cycle life, and fast-charging capability, demonstrating great promise as organic cathode materials for alkali-ion batteries.