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Title: New promising lithium malonatoborate salts for high voltage lithium ion batteries

Here, three new lithium salts, lithium difluoro-2-methyl-2-fluoromalonaoborate (LiDFMFMB), lithium difluoro-2-ethyl-2-fluoromalonaoborate (LiDFEFMB), and lithium difluoro-2-propyl-2-fluoro malonaoborate (LiDFPFMB), have been synthesized and evaluated for application in lithium ion batteries. These new salts are soluble in a mixture of ethylene carbonate (EC) and ethyl methyl carbonate (EMC) (1:2 by wt.) and 1.0 M salt solutions can be easily prepared. The ionic conductivities of these new salts are close to those of LiBF 4 and LiPF 6. Cyclic voltammograms reveal that these new salt based electrolytes can passivate both natural graphite and high voltage spinel LiNi 0.5Mn 1.5O 4 (LNMO) to form effective solid electrolyte interphases (SEIs). In addition, these new salts based electrolytes exhibit good cycling stability with high coulombic efficiencies in both LiNi 0.5Mn 1.5O 4 and graphite based half-cells and full cells.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [1] ;  [1] ;  [3]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Northeast Normal Univ., Changchun (People's Republic of China)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Journal of Materials Chemistry. A
Additional Journal Information:
Journal Volume: 5; Journal Issue: 3; Journal ID: ISSN 2050-7488
Publisher:
Royal Society of Chemistry
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE
OSTI Identifier:
1344276

Sun, Xiao -Guang, Wan, Shun, Guang, Hong Yu, Fang, Youxing, Reeves, Kimberly Shawn, Chi, Miaofang, and Dai, Sheng. New promising lithium malonatoborate salts for high voltage lithium ion batteries. United States: N. p., Web. doi:10.1039/C6TA07757A.
Sun, Xiao -Guang, Wan, Shun, Guang, Hong Yu, Fang, Youxing, Reeves, Kimberly Shawn, Chi, Miaofang, & Dai, Sheng. New promising lithium malonatoborate salts for high voltage lithium ion batteries. United States. doi:10.1039/C6TA07757A.
Sun, Xiao -Guang, Wan, Shun, Guang, Hong Yu, Fang, Youxing, Reeves, Kimberly Shawn, Chi, Miaofang, and Dai, Sheng. 2016. "New promising lithium malonatoborate salts for high voltage lithium ion batteries". United States. doi:10.1039/C6TA07757A. https://www.osti.gov/servlets/purl/1344276.
@article{osti_1344276,
title = {New promising lithium malonatoborate salts for high voltage lithium ion batteries},
author = {Sun, Xiao -Guang and Wan, Shun and Guang, Hong Yu and Fang, Youxing and Reeves, Kimberly Shawn and Chi, Miaofang and Dai, Sheng},
abstractNote = {Here, three new lithium salts, lithium difluoro-2-methyl-2-fluoromalonaoborate (LiDFMFMB), lithium difluoro-2-ethyl-2-fluoromalonaoborate (LiDFEFMB), and lithium difluoro-2-propyl-2-fluoro malonaoborate (LiDFPFMB), have been synthesized and evaluated for application in lithium ion batteries. These new salts are soluble in a mixture of ethylene carbonate (EC) and ethyl methyl carbonate (EMC) (1:2 by wt.) and 1.0 M salt solutions can be easily prepared. The ionic conductivities of these new salts are close to those of LiBF4 and LiPF6. Cyclic voltammograms reveal that these new salt based electrolytes can passivate both natural graphite and high voltage spinel LiNi0.5Mn1.5O4 (LNMO) to form effective solid electrolyte interphases (SEIs). In addition, these new salts based electrolytes exhibit good cycling stability with high coulombic efficiencies in both LiNi0.5Mn1.5O4 and graphite based half-cells and full cells.},
doi = {10.1039/C6TA07757A},
journal = {Journal of Materials Chemistry. A},
number = 3,
volume = 5,
place = {United States},
year = {2016},
month = {12}
}

Works referenced in this record:

Nonaqueous Liquid Electrolytes for Lithium-Based Rechargeable Batteries
journal, October 2004