Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: April 30, 2025

Aqueous zinc ion batteries (AZIBs) stand out among various battery technologies for their advantages, including low cost, high safety, and green credentials. We chemically polymerized anthraquinone triphenylamine derivatives to prepare the π-conjugated polymers poly 2-((4-(diphenylamine)benzylidene)amino)anthracene-9,10-dione (PDAH) 2-((4-((4-bromophenyl)(phenyl)amino)benzylidene)amino)anthracene-9,10-dione (PDABr), as cathode materials AZIBs. The anthraquinone-based structure's charge storage capacity, coupled with strong transfer capability, enabled these electrode exhibit excellent electrochemical performance. Among them, electron-withdrawing group -introduced in PDABr induces a p-π interaction adjacent benzene ring, optimizing electron migration within battery. This enhancement improves material's stability activity, leading superior performance, especially rate cycle life, stability. Comparative experiments revealed that PDABr//Zn exhibited higher specific capacity (0.1 A g-1, 210.57 mA h g-1) than PDAH//Zn 145.7 g-1). At same current density, also showed better cycling (capacity retention of 93% after 6000 cycles at 5 Additionally, exceptional maintaining its upon returning initial density. By comparing physical properties PDABr//Zn, relationship between conjugation effect performance is elucidated. study provides strategy fine-tuned, molecular design organic materials, specifically aimed enhancing high-energy zinc-ion batteries.

Language: Английский