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:
Apr. 24, 2012
Filed:
Jun. 20, 2008
Tsumoru Ohata, Kyoto, JP;
Junji Nakajima, Osaka, JP;
Tetsuya Hayashi, Kadoma, JP;
Shigeo Ikuta, Kawanabe-gun, JP;
Yusuke Fukumoto, Moriguchi, JP;
Tsumoru Ohata, Kyoto, JP;
Junji Nakajima, Osaka, JP;
Tetsuya Hayashi, Kadoma, JP;
Shigeo Ikuta, Kawanabe-gun, JP;
Yusuke Fukumoto, Moriguchi, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A secondary battery includes: a positive electrode; a negative electrode; a porous electron-insulating layer adhered to a surface of at least one selected from the group consisting of the positive electrode and the negative electrode; and an electrolyte. The porous electron-insulating layer comprises a particulate filler and a resin binder, and the particulate filler comprises an indefinite-shape particle comprising a plurality of primary particles that are joined to one another. A neck is preferably formed between the primary particles. Since the porous electron-insulating layer has high porosity, it is possible to obtain a secondary battery that exhibits excellent low-temperature characteristics, which are particularly important in actual use, and that is capable of discharging at a large current.