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Title: Development of Lithium Dimethyl Phosphate as an Electrolyte Additive for Lithium Ion Batteries

Journal Article · · Journal of the Electrochemical Society
DOI:https://doi.org/10.1149/2.1131607jes· OSTI ID:1437261
 [1];  [1];  [2];  [2];  [1]
  1. Univ. of Rhode Island, Kingston, RI (United States). Department of Chemistry
  2. Battery R&D Center, Samsung SDI, Yeongtong-gu, Suwon-si (South Korea)

The novel electrolyte additive lithium dimethyl phosphate (LiDMP) has been synthesized and characterized. Incorporation of LiDMP (0.1% wt) into LiPF6 in ethylene carbonate (EC) / ethyl methyl carbonate (EMC) (3:7 wt) results in improved rate performance and reduced impedance for graphite / LiNi1/3Mn1/3Co1/3O2 cells. Ex-situ surface analysis of the electrodes suggests that incorporation of LiDMP results in a modification of the solid electrolyte interphase (SEI) on the anode. A decrease in the concentration of lithium alkyl carbonates and an increase in the concentration of lithium fluoro phosphates are observed. The change in the anode SEI structure is responsible for the increased rate performance and decreased cell impedance.

Research Organization:
Univ. of Rhode Island, Kingston, RI (United States). Department of Chemistry
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0007074
OSTI ID:
1437261
Journal Information:
Journal of the Electrochemical Society, Vol. 163, Issue 7; ISSN 0013-4651
Publisher:
The Electrochemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 11 works
Citation information provided by
Web of Science

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Safe and fast-charging Li-ion battery with long shelf life for power applications journal April 2011
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A combination of lithium difluorophosphate and vinylene carbonate as reducible additives to improve cycling performance of graphite electrodes at high rates journal December 2015
Atomic Layer Deposition of the Solid Electrolyte LiPON journal July 2015
Role of 1,3-Propane Sultone and Vinylene Carbonate in Solid Electrolyte Interface Formation and Gas Generation journal May 2015

Cited By (1)

Lithium Bis(2,2,2-trifluoroethyl)phosphate Li[O 2 P(OCH 2 CF 3 ) 2 ]: A High Voltage Additive for LNMO/Graphite Cells journal January 2018

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