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:
Oct. 03, 2006
Filed:
Feb. 09, 2004
Junji Nakajima, Osaka, JP;
Tsumoru Ohata, Kyoto, JP;
Takashi Takano, Osaka, JP;
Kohei Suzuki, Yao, JP;
Tetsuya Hayashi, Kadoma, JP;
Junji Nakajima, Osaka, JP;
Tsumoru Ohata, Kyoto, JP;
Takashi Takano, Osaka, JP;
Kohei Suzuki, Yao, JP;
Tetsuya Hayashi, Kadoma, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A lithium ion secondary battery comprising: a positive electrode, a negative electrode, a separator interposed between the positive and negative electrodes, and an electrolyte prepared by dissolving a lithium salt in a non-aqueous solvent, wherein the separator comprises a porous film layer containing basic solid particles and a composite binder, the porous film layer is adhered to at least one surface of at least one of the positive and negative electrodes, the composite binder comprises a primary binder and a secondary binder, the primary binder comprises polyether sulfone and the secondary binder comprises polyvinylpyrrolidone.