期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 7, 页码 1898-1902出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201711328
关键词
aluminum-sulfur battery; electrochemistry; energy storage; ionic liquid electrolytes; kinetics
资金
- MOST [2016YFA0200100, 2014CB932402, 2016YFB0100100]
- National Science Foundation of China [51525206, 51521091, 51472249, 51372253, U1401243]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA09010104]
- Key Research Program of the Chinese Academy of Sciences [KGZD-EW-T06]
- CAS/SAFEA International Partnership Program for Creative Research Teams
- Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund (the second phase)
The electrochemical performance of the aluminum-sulfur (Al-S) battery has very poor reversibility and a low charge/discharge current density owing to slow kinetic processes determined by an inevitable dissociation reaction from Al2Cl7- to free Al3+center dot Al2Cl6Br- was used instead of Al2Cl7- as the dissociation reaction reagent. A 15-fold faster reaction rate of Al2Cl6Br- dissociation than that of Al2Cl7- was confirmed by density function theory calculations and the Arrhenius equation. This accelerated dissociation reaction was experimentally verified by the increase of exchange current density during Al electro-deposition. Using Al2Cl6Br- instead of Al2Cl7- , a kinetically accelerated Al-S battery has a sulfur utilization of more than 80%, with at least four times the sulfur content and five times the current density than that of previous work.
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