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Title: Reversible S 0/MgS x Redox Chemistry in a MgTFSI 2/MgCl 2 /DME Electrolyte for Rechargeable Mg/S Batteries

Abstract

The redox chemistry of magnesium and its application in rechargeable Mg batteries has gained 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 research 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 MgTFSI 2/MgCl 2/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 S 0/MgS x redox processes and that the large voltage hysteresis is mainly due to the Mg anode overpotential.

Authors:
 [1];  [1];  [1];  [1];  [1];  [2];  [1]
  1. Univ. of Maryland, College Park, MD (United States)
  2. Army Research Lab., Adelphi, MD (United States)
Publication Date:
Research Org.:
Univ. of Maryland, College Park, MD (United States). Energy Frontier Research Center (EFRC) Nanostructures for Electrical Energy Storage (NEES)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1469863
Alternate Identifier(s):
OSTI ID: 1393994
Grant/Contract Number:  
SC0001160; DESC0001160
Resource Type:
Accepted Manuscript
Journal Name:
Angewandte Chemie
Additional Journal Information:
Journal Volume: 129; Journal Issue: 43; Related Information: NEES partners with University of Maryland (lead); University of California, Irvine; University of Florida; Los Alamos National Laboratory; Sandia National Laboratories; Yale University; Journal ID: ISSN 0044-8249
Publisher:
German Chemical Society
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; Batterien; Elektrochemie; Magnesium; Polysulfide; Schwefel

Citation Formats

Gao, Tao, Hou, Singyuk, Wang, Fei, Ma, Zhaohui, Li, Xiaogang, Xu, Kang, and Wang, Chunsheng. Reversible S0/MgSx Redox Chemistry in a MgTFSI2/MgCl2 /DME Electrolyte for Rechargeable Mg/S Batteries. United States: N. p., 2017. Web. doi:10.1002/ange.201708241.
Gao, Tao, Hou, Singyuk, Wang, Fei, Ma, Zhaohui, Li, Xiaogang, Xu, Kang, & Wang, Chunsheng. Reversible S0/MgSx Redox Chemistry in a MgTFSI2/MgCl2 /DME Electrolyte for Rechargeable Mg/S Batteries. United States. doi:10.1002/ange.201708241.
Gao, Tao, Hou, Singyuk, Wang, Fei, Ma, Zhaohui, Li, Xiaogang, Xu, Kang, and Wang, Chunsheng. Mon . "Reversible S0/MgSx Redox Chemistry in a MgTFSI2/MgCl2 /DME Electrolyte for Rechargeable Mg/S Batteries". United States. doi:10.1002/ange.201708241. https://www.osti.gov/servlets/purl/1469863.
@article{osti_1469863,
title = {Reversible S0/MgSx Redox Chemistry in a MgTFSI2/MgCl2 /DME Electrolyte for Rechargeable Mg/S Batteries},
author = {Gao, Tao and Hou, Singyuk and Wang, Fei and Ma, Zhaohui and Li, Xiaogang and Xu, Kang and Wang, Chunsheng},
abstractNote = {The redox chemistry of magnesium and its application in rechargeable Mg batteries has gained 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 research 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/MgSx redox processes and that the large voltage hysteresis is mainly due to the Mg anode overpotential.},
doi = {10.1002/ange.201708241},
journal = {Angewandte Chemie},
number = 43,
volume = 129,
place = {United States},
year = {2017},
month = {8}
}

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