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. 15, 2017
Filed:
Apr. 23, 2014
Sharp Kabushiki Kaisha, Osaka, JP;
Isao Asako, Osaka, JP;
Naoto Nishimura, Osaka, JP;
Tomohisa Yoshie, Osaka, JP;
Takahiro Matsuyama, Osaka, JP;
Shougo Esaki, Osaka, JP;
Shumpei Nishinaka, Osaka, JP;
Yuichi Kamimura, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A positive electrode for lithium ion secondary batteries includes a collector and a positive electrode active material layer formed on at least one surface of the collector. The positive electrode active material layer contains a lithium-containing metal oxide having a unit cell represented by the following formula and a conductive material and has voids with a volume of 0.82×10cm/cmto 7.87×10cm/cmper unit area of the collector:LiFeZrPSiO  (1)where 0<x<1 and 0<y<1. The unit cell has lattice constants satisfying 10.326≦a≦10.335, 6.006≦b≦6.012, and 4.685≦c≦4.714. The sum of the volume of the lithium-containing metal oxide and the volume of the conductive material is 1.61×10cm/cmto 6.46×10cm/cmper unit area of the collector.