Tuning the number of redox groups in the cathode toward high rate and long lifespan zinc-ion batteries

文献情報

出版日 2023-12-05

DOI 10.1039/D3CC05493D

インパクトファクター 6.222

著者

Yanjun Shi, Zhihui Xu, Pengcheng Wang, Haiguang Gao, Wanjiao He, Yanan Sun, Yucheng Huang, Juan Xu, Jianyu Cao

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要旨

We synthesized a small molecule, DBPTO, and used it as a cathode material in aqueous zinc-ion batteries. DBPTO presented a high reversible capacity of 382 mA h g−1 at 0.05 A g−1 and a long lifespan of over 60 000 cycles. In the same π-conjugated skeleton, DBPTO (containing four CO and two CN groups) shows a narrower energy gap than TAPQ (containing CO and four CN groups), which leads to the superior rate and cycling performance of DBPTO. The mechanism of charge storage of DBPTO also revealed that H+ and Zn2+ coordinated with the CO and CN sites by ex situ structural characterization and DFT calculations. Our results provide new insights into the design of organic cathodes with a high rate capability and long lifespan. Further efforts will focus on a deeper understanding of the charge storage mechanism.

掲載誌

Chemical Communications

CiteScore: 8.6

自己引用率: 4.7%

年間論文数: 2458

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