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:
Jun. 02, 2015
Filed:
Jun. 18, 2012
Takakazu Hirose, Fukushima, JP;
Kenichi Kawase, Fukushima, JP;
Takashi Fujinaga, Fukushima, JP;
Isao Koizumi, Fukushima, JP;
Toshio Nishi, Fukushima, JP;
Takakazu Hirose, Fukushima, JP;
Kenichi Kawase, Fukushima, JP;
Takashi Fujinaga, Fukushima, JP;
Isao Koizumi, Fukushima, JP;
Toshio Nishi, Fukushima, JP;
SONY CORPORATION, Tokyo, JP;
Abstract
A lithium-ion secondary battery includes a positive electrode, a negative electrode containing an active material, and an electrolytic solution, in which the active material includes a core portion capable of occluding and releasing lithium ions, and a covering portion arranged on at least part of a surface of the core portion, in which the covering portion contains, as constituent elements, Si, O, and at least one element M1 selected from Li, C, Mg, Al, Ca, Ti, Cr, Mn, Fe, Co, Ni, Cu, Ge, Zr, Mo, Ag, Sn, Ba, W, Ta, Na, and K, and the atomic ratio y (O/Si) of O to Si is 0.5≦y≦1.8.