ELECTROLYTE FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY USING IT

Title:

ELECTROLYTE FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY USING IT

Document Type and Number:

Japanese Patent JP2001006737

Kind Code:

A

Abstract:

To provide a lithium electrolyte battery with high capacity by its electrolyte containing a cyclic carbonate compound containing ethylenecarbonate; two or more linear carbonate compounds selected from a group of diethylecarbonate, ethylmethylcarbonate and diethylcarbonate; propylacetate; and lithium salt.

This electrolyte preferably contains 20-60 volume % of cyclic carbonate, 2.5-30 volume % of propylacetate and 30-77.5 volume % of a linear carbonate compound. Lithium salt is a compound selected from a group of hexafluorophosphate, lithium-tetrafluoroborate, lithium-hexafluoroarsenate, lithium-perchlorate and lithium-trifluoromethansulfonate, and the concentration of the lithium salt is 0.5-2.0 M. Especially, if an active material of LiNi1-xCOxMg2 is used, a battery excellent in capacity, life and low temperature characteristics is obtained.

Inventors:

KO TOKUTETSU
SO GIKAN
CHO GENICH

Application Number:

JP2000169518A

Publication Date:

January 12, 2001

Filing Date:

June 06, 2000

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Assignee:

SAMSUNG SDI CO LTD

International Classes:

H01M10/05; C01B31/04; H01M4/485; H01M4/587; H01M10/0525; H01M10/0568; H01M10/0569; H01M6/16; (IPC1-7): H01M10/40; H01M4/02; H01M4/58

Attorney, Agent or Firm:

Hidekazu Miyoshi (1 outside)

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