公开(公告)号：US10044036B2

公开(公告)日：2018-08-07

申请号：US15100479

申请日：2014-11-17

Applicant: GS Yuasa International Ltd.

Inventor： Daisuke Yoshikawa ,  Daisuke Endo

IPC: H01B1/08 ,  H01M4/525 ,  H01M4/505 ,  C01G53/00 ,  H01M4/131 ,  H01M10/0525 ,  H01M10/052 ,  H01M4/02

Abstract: Provided is a positive active material for a lithium secondary battery containing a lithium transition metal composite oxide. The lithium transition metal composite oxide has an α-NaFeO2 structure. A transition metal (Me) includes Co, Ni and Mn and a molar ratio Li/Me of lithium (Li) to the transition metal is larger than 1.2 and smaller than 1.6. The lithium transition metal composite oxide has a pore volume of 0.055 to 0.08 cc/g in a pore region in which a pore size, at which a differential pore volume determined by a BJH method from an adsorption isotherm using a nitrogen gas adsorption method exhibits a maximum value, is within a range up to 60 nm, and exhibits a single phase belonging to a space group R3-m at 1000° C.

公开(公告)号：US12191487B2

公开(公告)日：2025-01-07

申请号：US17636268

申请日：2020-07-03

Applicant: GS Yuasa International Ltd.

Inventor： Daisuke Yoshikawa ,  Shinya Otani

IPC: H01M4/52 ,  C01G53/00 ,  H01M4/505 ,  H01M4/525 ,  H01M4/02

Abstract: Provided is a positive active material for a nonaqueous electrolyte secondary battery which contains a lithium transition metal composite oxide, the lithium transition metal composite oxide having an α-NaFeO2 structure, containing Ni, Co and Mn as a transition metal (Me), and having an X-ray diffraction pattern attributable to a space group R3-m, in which a ratio of the full width at half maximum of a diffraction peak of the (003) plane to the full width at half maximum of a diffraction peak of the (104) plane, (003)/(104) at a Miller index hkl in X-ray diffraction measurement using a CuKα ray is 0.810 to 0.865, and a crystallite size is 410 Å or more.