Patent number: 9812709
Abstract: A lithium secondary battery includes a positive electrode, a negative electrode, and an electrolyte solution. The positive electrode contains a positive electrode active material including element M2 incorporated in a crystal structure in a surface layer area of a complex oxide, the oxide including the element M1 and being represented by the following formula (1), M2 being different from M1. The element M2 is at least one kind selected from the group consisting of magnesium Mg, calcium Ca, titanium Ti, zirconium Zr, sulfur S, fluorine F, iron Fe, copper Cu, boron B, aluminum Al, phosphorus P, carbon C, manganese Mn, nickel Ni, and cobalt Co. Li1+a(MnbCocNi1?b?c)1?aM1dO2?e??(1) M1 is at least one kind of aluminum, magnesium, zirconium, titanium, barium Ba, boron, silicon Si, and iron, a satisfies 0<a<0.25, b satisfies 0.5?b<0.7, c satisfies 0?c<1?b, d satisfies 0.01?d?0.2, and e satisfies 0?e?1.
Type:
Grant
Filed:
December 14, 2011
Date of Patent:
November 7, 2017
Assignee:
SONY CORPORATION
Inventors:
Kazuaki Endoh, Akira Takamuku, Masaharu Senoue, Guohua Li, Kenichi Kawase, Yosuke Hosoya
Publication number: 20170288219
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 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 x (O/Si) of O to Si is 0.5?x?1.8.
Type:
Application
Filed:
June 16, 2017
Publication date:
October 5, 2017
Inventors:
Takakazu Hirose, Kenichi Kawase, Toshio Nishi, Isao Koizumi
Patent number: 9780368
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 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 x (O/Si) of O to Si is 0.5?x?1.8.
Type:
Grant
Filed:
June 19, 2012
Date of Patent:
October 3, 2017
Assignee:
Sony Corporation
Inventors:
Takakazu Hirose, Kenichi Kawase, Toshio Nishi, Isao Koizumi