Journal
JOURNAL OF APPLIED ELECTROCHEMISTRY
Volume 42, Issue 5, Pages 291-296Publisher
SPRINGER
DOI: 10.1007/s10800-012-0398-0
Keywords
Lithium-ion batteries; LiDFOB; Electrolyte additive; High voltage
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Lithium difluoro(oxalato)borate (LiDFOB) was investigated as an electrolyte additive for high-voltage lithium-ion batteries in order to decrease the decomposition of the electrolyte. As a typical high-voltage cathode material, LiCoPO4 was tested in the LiDFOB-containing electrolyte, exhibiting higher reversible charge/discharge capacity and better cyclic stability. The effect of LiDFOB on the formation of a stable interphase film was investigated through cyclic voltammetry and X-ray photoelectron spectroscopy. LiDFOB was helpful to form a stable interphase film and passivate the cathode surface; therefore, the decomposition of the electrolyte was inhibited accordingly.
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