公开(公告)号：WO2019012497A1

公开(公告)日：2019-01-17

申请号：PCT/IB2018/055199

申请日：2018-07-13

Applicant: TODA KOGYO CORP.

Inventor： WATANABE, Hiroyasu ,  SUN, Xiang

IPC: C01G53/00

Abstract: The present invention provides positive electrode active substance particles comprising a lithium nickelate composite oxide which have a high energy density and which are excellent in repeated charge/discharge cycle characteristics upon charging at a high voltage when used in a secondary battery, as well as a non-aqueous electrolyte secondary battery. The present invention relates to positive electrode active substance particles each comprising: a core particle X comprising a lithium nickelate composite oxide having a layer structure which is represented by the formula of Li 1+a Ni 1-b-c Co b M c O 2 wherein M is at least one element selected from the group consisting of Mn, Al, B, Mg, Ti, Sn, Zn and Zr; a is a number of -0.1 to 0.2 (-0.1 ≤ a ≤ 0.2); b is a number of 0.05 to 0.5 (0.05 ≤ b ≤ 0.5); and c is a number of 0.01 to 0.4 (0.01 ≤ c ≤ 0.4); and a coating compound Y comprising at least one element selected from the group consisting of Al, Mg, Zr, Ti and Si, in which the coating compound Y has an average film thickness of 0.2 to 5 nm, a degree of crystallinity of 50 to 95%, a degree of epitaxy of 50 to 95% and a coating ratio (coverage) of 50 to 95%.

公开(公告)号：EP3761414A1

公开(公告)日：2021-01-06

申请号：EP19760971.2

申请日：2019-03-01

Applicant: Toda Kogyo Corp.

Inventor： WATANABE, Hiroyasu ,  SUN, Xiang ,  FETTERER, Mitchell

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/36 ,  H01M4/505 ,  H01M10/052

Abstract: The present invention provides positive electrode active substance particles comprising a lithium nickelate composite oxide which have a high energy density and are excellent in repeated charge/discharge cycle characteristics when charging at a high voltage, as well as a non-aqueous electrolyte secondary battery. The present invention relates to positive electrode active substance particles each comprising a core particle X comprising a lithium nickelate composite oxide having a layer structure which is represented by the formula: Li 1+a Ni 1-b-c Co b M c O 2
wherein M is at least one element selected from the group consisting of Mn, Al, B, Mg, Ti, Sn, Zn and Zr, a is a number of -0.1 to 0.2 (-0.1 ≤ a ≤ 0.2), b is a number of 0.05 to 0.5 (0.05 ≤ b ≤ 0.5) and c is a number of 0.01 to 0.4 (0.01 ≤ c ≤ 0.4); and a coating compound Y comprising at least one element selected from the group consisting of Al, Mg, Zr, Ti and Si and having an average film thickness of 0.2 to 5 nm, in which a crystal phase having a layered rock salt structure and comprising Ni 2+ ions is present in the form of a layer between the core particle X and the coating compound Y.