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

Authors

Mickdy S. Milien, University of Rhode Island
Usha Tottempudi, University of Rhode Island
Miyoung Son
Makoto Ue
Brett L. Lucht, University of Rhode IslandFollow

Document Type

Article

Date of Original Version

2016

Abstract

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 / LiNi_1/3Mn_1/3Co_1/3O₂ 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.

Citation/Publisher Attribution

Milien, M. S., Tottempudi, U., Son, M., Ue, M., & Lucht, B. L. (2016). Development of Lithium Dimethyl Phosphate as an Electrolyte Additive for Lithium Ion Batteries. J. Electrochem. Soc., 163(7), A1369-A1372. doi: 10.1149/2.1131607jes

Available at: http://dx.doi.org/10.1149/2.1131607jes

Creative Commons License

This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.