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Title: Solvating power series of electrolyte solvents for lithium batteries

Abstract

From dictating the redox potential of electrolyte solvents to shaping the stability of solid-electrolyte interfaces, solvation plays a critical role in the electrochemistry of electrolytes. To efficiently design functional electrolytes for lithium batteries, it is particularly important to understand the relative solvating ability of each individual organic solvent, because most of the electrolyte systems are comprised of two or more electrolyte solvents. Using a newly developed internally referenced diffusion-ordered spectroscopy technique and diffusion coefficient–coordination ratio ($D–α$) analysis, we successfully constructed a solvating power series for common electrolyte solvents. We demonstrated the usefulness of this solvating power series in designing more reliable electrolyte system by selecting an appropriate fluorinated electrolyte solvent for a high-voltage lithium metal battery (LMB) as an example. For a methyl(2,2,2-trifluoroethyl)carbonate-based electrolyte, we identified fluoroethylene carbonate as a more desirable cyclic carbonate co-solvent than difluoroethylene carbonate for LMB due to its significantly higher ability to solvate lithium ions.

Authors:
 [1];  [1];  [2];  [2];  [2];  [2]; ORCiD logo [1]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Chemical Sciences and Engineering Division
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1542132
Alternate Identifier(s):
OSTI ID: 1503373
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Energy & Environmental Science
Additional Journal Information:
Journal Volume: 12; Journal Issue: 4; Journal ID: ISSN 1754-5692
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
electrolyte solvation; internally-referenced DOSY-NMR; lithium batteries; lithium metal stabilization; relative solvating power

Citation Formats

Su, Chi-Cheung, He, Meinan, Amine, Rachid, Rojas, Tomas, Cheng, Lei, Ngo, Anh T., and Amine, Khalil. Solvating power series of electrolyte solvents for lithium batteries. United States: N. p., 2019. Web. doi:10.1039/c9ee00141g.
Su, Chi-Cheung, He, Meinan, Amine, Rachid, Rojas, Tomas, Cheng, Lei, Ngo, Anh T., & Amine, Khalil. Solvating power series of electrolyte solvents for lithium batteries. United States. doi:10.1039/c9ee00141g.
Su, Chi-Cheung, He, Meinan, Amine, Rachid, Rojas, Tomas, Cheng, Lei, Ngo, Anh T., and Amine, Khalil. Mon . "Solvating power series of electrolyte solvents for lithium batteries". United States. doi:10.1039/c9ee00141g.
@article{osti_1542132,
title = {Solvating power series of electrolyte solvents for lithium batteries},
author = {Su, Chi-Cheung and He, Meinan and Amine, Rachid and Rojas, Tomas and Cheng, Lei and Ngo, Anh T. and Amine, Khalil},
abstractNote = {From dictating the redox potential of electrolyte solvents to shaping the stability of solid-electrolyte interfaces, solvation plays a critical role in the electrochemistry of electrolytes. To efficiently design functional electrolytes for lithium batteries, it is particularly important to understand the relative solvating ability of each individual organic solvent, because most of the electrolyte systems are comprised of two or more electrolyte solvents. Using a newly developed internally referenced diffusion-ordered spectroscopy technique and diffusion coefficient–coordination ratio ($D–α$) analysis, we successfully constructed a solvating power series for common electrolyte solvents. We demonstrated the usefulness of this solvating power series in designing more reliable electrolyte system by selecting an appropriate fluorinated electrolyte solvent for a high-voltage lithium metal battery (LMB) as an example. For a methyl(2,2,2-trifluoroethyl)carbonate-based electrolyte, we identified fluoroethylene carbonate as a more desirable cyclic carbonate co-solvent than difluoroethylene carbonate for LMB due to its significantly higher ability to solvate lithium ions.},
doi = {10.1039/c9ee00141g},
journal = {Energy & Environmental Science},
number = 4,
volume = 12,
place = {United States},
year = {2019},
month = {3}
}

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