Development of Lithium Dimethyl Phosphate as an Electrolyte Additive for Lithium Ion Batteries
- Univ. of Rhode Island, Kingston, RI (United States). Department of Chemistry
- 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
Web of Science
Lithium Bis(2,2,2-trifluoroethyl)phosphate Li[O 2 P(OCH 2 CF 3 ) 2 ]: A High Voltage Additive for LNMO/Graphite Cells
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journal | January 2018 |
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