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High Performance and Flexible Aqueous Zinc Batteries Using N-Containing Organic Cathodes

preprint
submitted on 30.01.2020 and posted on 31.01.2020 by Guangchi Sun, Baozhu Yang, Gui Yin, Hanping Zhang, Qi Liu
Aqueous zinc batteries are considered as one of the most promising energy storage systems for large-scale energy storage and wearable electronics, owing to their low cost and intrinsic safety. However, cathode materials that can reversibly host Zn2+ are still less. Here, we demonstrate that two N-containing organic compounds, hexamethoxy hexaazatrinaphthylene (HMHATN) and hexaazatrinaphthylene (HATN), used as cathodes can exhibit excellent reversible Zn2+ storage capability with fast kinetics and the high capacity of 542 and 963 mA h g-1, respectively. The Zn//HMHATN and Zn//HATN full batteries display the high energy density of 160 and 221.6 W h kg-1, respectively, and long-term cycling stability. Further, we investigate the mechanism of Zn2+ storage in the cathodes. More importantly, the flexible aqueous Zn//HMHATN and Zn//HATN batteries fabricated also have high capacity, long-term cycling life and impressive energy density, displaying its application prospect in wearable electronics. Our work opens a new system for finding organic cathode materials used in aqueous zinc batteries.

Funding

Natural Science Foundation of China (No. 21975034)

History

Email Address of Submitting Author

liuqi62@163.com

Institution

Changzhou University

Country

China

ORCID For Submitting Author

0000-0003-3996-6489

Declaration of Conflict of Interest

The authors declare no competing financial interests

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