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:
Feb. 23, 2016
Filed:
Dec. 22, 2011
Akira Takamuku, Fukushima, JP;
Kazuaki Endoh, Fukushima, JP;
Masaharu Senoue, Fukushima, JP;
Guohua LI, Saitama, JP;
Yosuke Hosoya, Fukushima, JP;
Kenichi Kawase, Fukushima, JP;
Akira Takamuku, Fukushima, JP;
Kazuaki Endoh, Fukushima, JP;
Masaharu Senoue, Fukushima, JP;
Guohua Li, Saitama, JP;
Yosuke Hosoya, Fukushima, JP;
Kenichi Kawase, Fukushima, JP;
SONY CORPORATION, Tokyo, JP;
Abstract
A lithium ion secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The positive electrode contains a lithium composite oxide. The negative electrode contains a material including at least one of silicon Si and tin Sn as a constituent element. The lithium composite oxide includes lithium Li having a composition ratio a, a first element having a composition ratio b, and a second element having a composition ratio c as a constituent element. The first element including two kinds or more selected from among manganese Mn, nickel Ni, and cobalt Co, and including at least manganese. The second element including at least one kind selected from among aluminum Al, titanium Ti, magnesium Mg, and boron B. The composition ratios a to c satisfy the relationships of 1.1<a<1.3, 0.7<b+c<1.1, 0<c<0.1, and a>b+c.