Non-aqueous electrolyte composition for batteries
AssigneesCheil Industries Inc., Samsung SDI Co., Ltd.
InventorsJong Seob Kim, Young Gyu Kim, Tu Won Chang, Kwang Sik Kim, Jin Sung Kim, Ky Hoon Ahn
Life of this patent
Estimating the term…
Abstract
Disclosed is a non-aqueous electrolyte composition for batteries, which is composed of a mixture of a fluorobenzene component and a carbonic acid ester component in which the volume ratio of the fluorobenzene component to the carbonic acid ester component ranges from 50:50 to 5:95. The non-aqueous electrolyte composition has a significant advantage over electrolyte compositions employing carbonic acid ester solvents only, in terms of low temperature performance, cell life, and high-temperature dischargeability.
Claims5
A non-aqueous electrolyte composition for lithium secondary cells, comprising a lithium salt dissolved in an organic solvent system composed of a fluorobenzene component (FB) and a carbonic acid ester component (CE), wherein the solvent components are present in a ratio from 50 FB:50 CE to 12.5 FB:87.5 CE, based on volume percent, said fluorobenzene component being one or more compounds represented by the following general formula 1:
- wherein F represents a fluorine element and n is an integer of 1-6;
- and said carbonic acid ester component having compounds represented by the following general formulas 2 and 3:
- wherein R1 and R2, which may be the same or different, each represents an alkyl radical containing 1-4 carbon atoms and
- wherein R3, R4, R5 and R6, which may be the same or different, each represents a hydrogen atom or an alkyl radical containing 1-4 carbon atoms.
Dependencies are inferred from the claim text.