Authors
Kewei Lu, Kexiang Wang, Yifei Zhou, Xiaosui Yang, Xiaoting Wang, Wei Lyu, Yaozu Liao
Published in
Journal of colloid and interface science. Volume 723. Pages 140937. Jun 13, 2026. Epub Jun 13, 2026.
Abstract
Conjugated microporous polymers (CMPs) have emerged as promising organic cathode materials for high-performance lithium-ion batteries (LIBs). Herein, we present a protonated π-extended alkynyl-linked bipolar CMP (P-TAPE) for high-rate-capacity LIB cathode. P-TAPE was synthesized via Buchwald-Hartwig coupling by adopting tris(4-aminophenyl)amine and bis(4-bromophenyl)acetylene as units, followed by post-protonation treatment. The π-extended alkynyl linker enhances π-delocalization and backbone rigidity while introducing additional Li-reactive sites for n-type charge storage. While protonation of the triphenylamine p-type sites induces electronic polarization and narrows the bandgap, furthering facilitating faster charge transfer. As expected, P-TAPE shows a higher conductivity of 2.08 × 10-6 s m-1 and delivers a high specific capacity of 310.9 mA h g-1 (574.5 Wh kg-1) at 100 mA g-1, a high-rate-capacity of 186.1 mA h g-1 at 10 A g-1 and stable cycling performance (97% retention over 2000 cycles at 5 A g-1). This work gives insights into developing high-rate-capacity organic cathodes by rational designing protonated bipolar CMP for next-generation energy storage systems.
PMID:
42320139
Bibliographic data and abstract were imported from PubMed on 20 Jun 2026.
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