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:
Nov. 05, 2013
Filed:
Sep. 21, 2011
Takumi Katsurao, Fukushima-ken, JP;
Katsuo Horie, Fukushima-ken, JP;
Yukio Ichikawa, Fukushima-ken, JP;
Aisaku Nagai, Fukushima-ken, JP;
Takumi Katsurao, Fukushima-ken, JP;
Katsuo Horie, Fukushima-ken, JP;
Yukio Ichikawa, Fukushima-ken, JP;
Aisaku Nagai, Fukushima-ken, JP;
Kureha Corporation, Tokyo, JP;
Abstract
A non-aqueous battery comprising a positive electrode material capable of being doped with and liberating lithium, a negative electrode material capable of being doped with and liberating lithium, and a polymer electrolyte disposed between the positive and negative electrode materials. The polymer electrolyte is formed by mixing a vinylidene fluoride copolymer and a nonaqueous electrolytic solution with a solvent, followed by evaporation of the solvent, so as to retain a high proportion of the nonaqueous electrolytic solution, leading to high electroconductivity and excellent strength in this state. The vinylidene fluoride copolymer comprises 80 to 97 wt. % of vinylidene fluoride monomer units and 3 to 20 wt. % of units of at least one monomer copolymerizable with vinylidene fluoride monomer, and has an inherent viscosity of 1.7 to 7 dl/g, as measured at 30° C. in a solution at a concentration of 4 g of polymer in 1 liter of N,N-dimethylformamide.