期刊
CHEMICAL ENGINEERING JOURNAL
卷 450, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.138175
关键词
Hybrid additives; Bifunctional film; Synergistic effect; Al-air battery
资金
- National Natural Science Foundation of China [22062022]
- Opening Project of Sichuan University of Science and Engineering, Material Corrosion and Protection Key Laboratory of Sichuan province [2020CL06]
Aluminum-air battery is a promising clean energy source, but it is hindered by the self-corrosion of the aluminum anode. A new hybrid additive has been proposed to inhibit self-corrosion and form a dense bifunctional film on the anode, improving the battery's performance.
Aluminum-air battery is considered to be a hopeful source of clean energy. However, the serious self-corrosion of Al anode hinders its commercial application. Herein, we propose an original hybrid additive consisting of 4-amino-6-hydroxy-2-mercaptopyrimidine (AHMP) and zinc oxide (ZnO) to inhibit self-corrosion of Al-6061 in alkaline Al-air battery. It induces a dense bifunctional film formed on the anode. The anode utilization rate reaches 60%, and the mass capacity of full cell increases from 879 mAh g(-1) (blank) to 1785 mAh g(-1) (with the hybrid additive). Surprisingly, this film simultaneously functions to activate the anode, boosting the discharge voltage of full cell. Experiments and theoretical calculations jointly reveal the mechanism formation of this unique bifunctional interface film: site-directed bridging of double metals (Al, Zn) to distinct adsorption sites on AHMP molecules. Our work investigates the origin of the synergistic effect for hybrid additives and provides a new strategy for screening functionalized additives to construct characteristic aluminum/electrolyte interface film for Al-air battery.
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