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Title: A novel electrolyte salt additive for lithium-ion batteries with voltages greater than 4.7 V

Here, lithium bis(2-methyl-2-fluoromalonato)borate (LiBMFMB), as an additive in conventional electrolyte for LiNi 0.5Mn 1.5O 4, exhibits improved coulombic efficiencies and cycling stability. Cyclic voltammograms indicate the cells with additive form good SEIs during the first cycle whereas no additive cell needs more cycles to form a functional SEI. XPS reveals LiBMFMB could reduce the decomposition of LiPF 6 salt and solvents, resulting in thinner SEI.
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [1] ;  [1] ;  [2]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); The Univ. of Tennessee, Knoxville, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Advanced Energy Materials
Additional Journal Information:
Journal Volume: 7; Journal Issue: 4; Journal ID: ISSN 1614-6832
Publisher:
Wiley
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; solid electrolyte interfaces (SEI); lithium bis(2-methyl-2-fluoromalonato) borate (LiBMFMB); electrolyte additives; spinel LiNi1.5Mn0.5O4 (LNMO); high voltage batteries
OSTI Identifier:
1344993