The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 13, 2010
Filed:
Feb. 01, 2005
Akira Yamaguchi, Fukushima, JP;
Kaoru Nakajima, Miyagi, JP;
Yusuke Fujishige, Fukushima, JP;
Yuzuru Fukushima, Miyagi, JP;
Masayuki Nagamine, Fukushima, JP;
Akira Yamaguchi, Fukushima, JP;
Kaoru Nakajima, Miyagi, JP;
Yusuke Fujishige, Fukushima, JP;
Yuzuru Fukushima, Miyagi, JP;
Masayuki Nagamine, Fukushima, JP;
Sony Corporation, Tokyo, JP;
Abstract
An electrolyte solution and a battery which are capable of improving cycle characteristics are provided. An anode includes a simple substance, an alloy or a compound of a metal element or a metalloid element capable of forming an alloy with lithium as an anode active material. A separator is impregnated with an electrolyte solution formed through dissolving an electrolyte salt in a solvent. The electrolyte salt includes a first electrolyte salt including LiB(CO)and a second electrolyte salt including at least one kind selected from the group consisting of LiPF, LiBF, LiN(CFSO), LiN(CFSO), LiClO, LiAsFand LiC(CFSO). In the solvent, 4-fluoroethylene carbonate is included. A coating is formed on the anode by the first electrolyte salt, and high ionic conductivity can be obtained by the second electrolyte salt. Further an oxidation-decomposition reaction of the electrolyte solution which occurs in a cathode can be prevented by 4-fluoroethylene carbonate.