We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Reversible S<sup>0</sup>/MgS<sub> x</sub> Redox Chemistry in a MgTFSI<sub>2</sub>/MgCl<sub>2</sub>/DME Electrolyte for Rechargeable Mg/S Batteries.
- Authors
Gao, Tao; Hou, Singyuk; Wang, Fei; Ma, Zhaohui; Li, Xiaogang; Xu, Kang; Wang, Chunsheng
- Abstract
The redox chemistry of magnesium and its application in rechargeable Mg batteries has received increasing attention owing to the unique benefits of Mg metal electrodes, namely high reversibility without dendrite formation, low reduction potentials, and high specific capacities. The Mg/S couple is of particular interest owing to its high energy density and low cost. Previous reports have confirmed the feasibility of a rechargeable Mg/S battery; however, only limited cycling stability was achieved, and the complicated procedure for the preparation of the electrolytes has significantly compromised the benefits of Mg/S chemistry and hindered the development of Mg/S batteries. Herein, we report the development of the first rechargeable Mg/S battery with a MgTFSI2/MgCl2/DME electrolyte (DME=1,2-dimethoxyethane, TFSI=bis(trifluoromethanesulfonyl)imide) and realize the best cycling stability among all reported Mg/S batteries by suppressing polysulfide dissolution. Mechanistic studies show that the battery works via S0/MgS x redox processes and that the large voltage hysteresis is mainly due to the Mg anode overpotential.
- Subjects
OXIDATION-reduction reaction; STORAGE batteries; ELECTROLYTES; MAGNESIUM sulfate; CHEMICAL stability; DISSOLUTION (Chemistry); OVERPOTENTIAL
- Publication
Angewandte Chemie, 2017, Vol 129, Issue 43, p13711
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201708241