Issue 23, 2015

Ethylene ethyl phosphate as a multifunctional electrolyte additive for lithium-ion batteries

Abstract

The effects of ethylene ethyl phosphate (EEP) as a multifunctional electrolyte additive on safety characteristics and electrochemical performance of lithium-ion batteries are investigated. Based on the flammability test, the self-extinguishing time of the electrolyte with 10% EEP is only less than half of the baseline electrolyte, which indicates that EEP is a highly efficient flame retardant for the electrolyte. During overcharging the LiNi1/3Co1/3Mn1/3O2/Li cells, incorporation of EEP into the electrolyte can postpone the sharp voltage rise. Therefore, EEP is an improver of safety characteristics of lithium-ion batteries, both in terms of flame resistance and overcharge protection. Furthermore, the EEP-containing electrolyte in the half-cells and full-cells both exhibit higher initial coulombic efficiency and cycling stability than the baseline electrolyte. It is concluded that EEP is a good film-formation additive not only for the graphite anode, but also for the LiNi1/3Co1/3Mn1/3O2 cathode. Therefore, EEP is proposed as a promising multifunctional electrolyte additive for lithium-ion batteries.

Graphical abstract: Ethylene ethyl phosphate as a multifunctional electrolyte additive for lithium-ion batteries

Article information

Article type
Paper
Submitted
06 Dec 2014
Accepted
23 Jan 2015
First published
26 Jan 2015

RSC Adv., 2015,5, 17566-17571

Ethylene ethyl phosphate as a multifunctional electrolyte additive for lithium-ion batteries

D. Gao, J. B. Xu, M. Lin, Q. Xu, C. F. Ma and H. F. Xiang, RSC Adv., 2015, 5, 17566 DOI: 10.1039/C4RA15899G

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