期刊
CHEMICAL ENGINEERING JOURNAL
卷 431, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.134253
关键词
Aqueous zinc-batteries; Organic cathode materials; Flexible batteries; Hexaazatrinaphthylene; Hexamethoxy hexaazatrinaphthylene
资金
- National Natural Science Foundation of China [21975034]
- Natural Science Research Key Project of Jiangsu Colleges and Universities [16KJA430005]
- Research Project of Jiangsu Province Key Laboratory of Fine Petrochemical Engineering
- Research Project of State Key Laboratory of Coordination Chemistry
The use of HMHATN and HATN as cathode materials demonstrates high capacity and fast kinetics, making them promising candidates for large-scale energy storage and wearable electronics.
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, developing high-performance cathode materials with environmentally friendly is still an important task. Here, we demonstrate that two N-containing organic compounds, hexamethoxy hexaazatrinaphthylene (HMHATN) and hexaazatrinaphthylene (HATN), used as cathodes can exhibit high capacity with fast kinetics. Thus, 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. Electrochemical analysis, density functional theory calculation and ex situ analysis identify that the organic cathodes involve uptake and removal of Zn2+ and H+ in the discharging-charging process. Furthermore, 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.
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