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Lipophilic Additives for Highly Concentrated Electrolytes in Lithium-Sulfur Batteries

Journal Article · · Journal of the Electrochemical Society
DOI:https://doi.org/10.1149/2.0921912jes· OSTI ID:1579910
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The use of concentrated electrolytes in batteries has been impeded in part by the lack of compatible electrolyte additives for protection of electrodes. Herein, a lipophilic additive tetrabutylammonium iodide (TBAI = [Bu4N]I) was introduced to concentrated electrolyte (CH3CN)(2)LiTFSI/TTE (TTE = 1,1,2,2-tetrafluoroethyl 2,2,3,3-tetrafluoropropyl ether) for Li-S batteries. Electrochemical and SEM/EDS analyses showed that the additive provided short-term capacity retention via removal of S deposits by in situ generated I-2. These results strongly suggest lipophilic salts as viable candidates for additives in concentrated electrolytes. (c) 2019 The Electrochemical Society.
Research Organization:
Argonne National Laboratory (ANL)
Sponsoring Organization:
USDOE Office of Science - Office of Basic Energy Sciences
DOE Contract Number:
AC02-06CH11357
OSTI ID:
1579910
Journal Information:
Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 12 Vol. 166; ISSN 0013-4651
Country of Publication:
United States
Language:
English

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