Electrolytes for Li-ion cells in low temperature applications

Author

Smart, M.C. ; Ratnakumar, B.V. ; Surampudi, S.

Author_Institution

Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA

fYear

1999

fDate

1999

Firstpage

55

Lastpage

60

Abstract

Prototype AA-size lithium-ion cells have been demonstrated to operate effectively at temperatures as low as -30 to -40°C. These improvements in low temperature cell performance have been realized by the incorporation of ethylene carbonate-based electrolytes which possess low melting, low viscosity co-solvents, such as methyl acetate, ethyl acetate, γ-butyrolactone, and ethyl methyl carbonate. The cells containing a 0.75 M LiPF₆ EC+DEC+DMC+EMC (1:1:1:1) electrolyte displayed the best performance at -30°C (>90% of the room temperature capacity @~C/15 rate), whereas, at -40°C the cells with the 0.75 M LiPF₆ EC+DEC+DMC+MA (1:1:1:1) and 0.75 M LiPF ₆ EC+DEC+DMC+EA (1:1:1:1) electrolytes showed superior performance

Keywords

electrochemistry; electrolytes; lithium; secondary cells; -30 to -40 C; AA-size cells; Li; Li-ion secondary batteries; LiPF₆; electrolyte performance; ethylene carbonate-based electrolytes; low-temperature applications; Batteries; Conductivity measurement; Impedance measurement; Mars; NASA; Organic materials; Prototypes; Temperature distribution; Temperature measurement; Viscosity;

fLanguage

English

Publisher

ieee

Conference_Titel

Battery Conference on Applications and Advances, 1999. The Fourteenth Annual

Conference_Location

Long Beach, CA

ISSN

1089-8182

Print_ISBN

0-7803-4967-9

Type

conf

DOI

10.1109/BCAA.1999.795966

Filename

795966