Issue 31, 2023

Porous bipolar polymers as organic cathodes for sustainable sodium/potassium-ion batteries

Abstract

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.

Graphical abstract: Porous bipolar polymers as organic cathodes for sustainable sodium/potassium-ion batteries

Associated articles

Supplementary files

Article information

Article type
Paper
Submitted
25 apr 2023
Accepted
08 iyl 2023
First published
10 iyl 2023

J. Mater. Chem. A, 2023,11, 16636-16647

Author version available

Porous bipolar polymers as organic cathodes for sustainable sodium/potassium-ion batteries

M. Mohammadiroudbari, J. Huang, E. Y. Kim, Z. Yang, F. Chen and C. Luo, J. Mater. Chem. A, 2023, 11, 16636 DOI: 10.1039/D3TA02445H

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