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:
Aug. 21, 2012
Filed:
Sep. 11, 2007
Katsuhiko Tsunashima, Tokyo, JP;
Masahiro Kikuchi, Tokyo, JP;
Katsuhiko Tsunashima, Tokyo, JP;
Masahiro Kikuchi, Tokyo, JP;
Nippon Chemical Industrial Co., Ltd., Tokyo, JP;
Abstract
An object of the present invention is to provide an electrolyte solution for lithium-ion secondary batteries comprising a tetraalkylphosphonium salt which improves the cycle characteristics and safety of lithium-ion batteries, and to provide a lithium-ion secondary battery using the electrolyte solution. Disclosed is an electrolyte comprising a tetraalkylphosphonium salt represented by general formula (1) wherein Rrepresents a linear, branched or alicyclic alkyl group having 2 to 6 carbon atoms and Rrepresents a linear, branched or alicyclic alkyl group having 1 to 14 carbon atoms, provided that Rand Rare different from each other and the total number of carbon atoms in the phosphonium cation is 20 or less; and X represents an anion.