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Shi Y, Xu Z, Wang P, Gao H, He W, Sun Y, Huang Y, Xu J, Cao J. Tuning the number of redox groups in the cathode toward high rate and long lifespan zinc-ion batteries. Chem Commun (Camb) 2024; 60:420-423. [PMID: 38086642 DOI: 10.1039/d3cc05493d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
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.
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Affiliation(s)
- Yanjun Shi
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Analysis and Testing Center, School of Petrochemical Engineering, Changzhou University, 1 Gehu Road, Changzhou, Jiangsu 213164, China.
| | - Zhihui Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Analysis and Testing Center, School of Petrochemical Engineering, Changzhou University, 1 Gehu Road, Changzhou, Jiangsu 213164, China.
| | - Pengcheng Wang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Analysis and Testing Center, School of Petrochemical Engineering, Changzhou University, 1 Gehu Road, Changzhou, Jiangsu 213164, China.
| | - Haiguang Gao
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Analysis and Testing Center, School of Petrochemical Engineering, Changzhou University, 1 Gehu Road, Changzhou, Jiangsu 213164, China.
| | - Wanjiao He
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Analysis and Testing Center, School of Petrochemical Engineering, Changzhou University, 1 Gehu Road, Changzhou, Jiangsu 213164, China.
| | - Yanan Sun
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Yucheng Huang
- College of Chemistry and Material Science, Anhui Normal University, Wuhu 241000, China
| | - Juan Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Analysis and Testing Center, School of Petrochemical Engineering, Changzhou University, 1 Gehu Road, Changzhou, Jiangsu 213164, China.
| | - Jianyu Cao
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Analysis and Testing Center, School of Petrochemical Engineering, Changzhou University, 1 Gehu Road, Changzhou, Jiangsu 213164, China.
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