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    Process for producing nickel cobalt aluminum composite hydroxide and process for producing positive electrode active material for non-aqueous electrolyte secondary batteries
    1.
    发明授权
    Process for producing nickel cobalt aluminum composite hydroxide and process for producing positive electrode active material for non-aqueous electrolyte secondary batteries 有权

    公开(公告)号：US10297825B2

    公开(公告)日：2019-05-21

    申请号：US15523587

    申请日：2015-10-20

    申请人： SUMITOMO METAL MINING CO., LTD.

    发明人： Kazuomi Ryoshi ,  Koji Yamaji ,  Kensaku Mori

    IPC分类号： H01M10/052 ,  H01M4/525 ,  H01M4/02 ,  C01G53/04

    摘要： Disclose herein are processes for producing a nickel cobalt aluminum composite hydroxide and producing a positive electrode active material for non-aqueous electrolyte secondary batteries. Nucleation is performed by controlling an aqueous solution for nucleation containing a nickel-containing metal compound, cobalt-containing metal compound, ammonium ion supplier, and aluminum source so that the aqueous solution's pH for nucleation is 12.0 to 13.4, and then in a particle growth step, particle growth is performed in an aqueous solution for particle growth obtained by controlling the aqueous solution for nucleation obtained in the nucleation step so that the pH of aqueous solution for nucleation is 10.5 to 12.0. Further, in nucleation step, an aqueous solution containing aluminum and sodium is used as the aluminum source contained in aqueous solution for nucleation, and the mole ratio of sodium to aluminum in aqueous solution containing aluminum and sodium is adjusted to 1.5 to 3.0.

    Cathode active material for non-aqueous electrolyte secondary battery and manufacturing method thereof
    6.
    发明授权
    Cathode active material for non-aqueous electrolyte secondary battery and manufacturing method thereof 有权

    公开(公告)号：US10516164B2

    公开(公告)日：2019-12-24

    申请号：US16034586

    申请日：2018-07-13

    申请人： SUMITOMO METAL MINING CO., LTD.

    发明人： Tomoko Nakayama ,  Rei Kokado ,  Kensaku Mori

    IPC分类号： H01B1/08 ,  H01M4/485 ,  H01M4/525 ,  C01G53/00 ,  H01M10/0525 ,  H01M4/505 ,  H01M10/052

    摘要： The purpose of the present invention is to easily provide at low cost, a cathode active material for non-aqueous electrolyte secondary batteries, which exhibits high particle strength and high weather resistance, while enabling achievement of excellent charge and discharge capacity and excellent output characteristics in cases where the cathode active material is used as a cathode material of a non-aqueous electrolyte secondary battery. A slurry of from 500 g/L to 2000 g/L is formed by adding water to a powder of a lithium nickel composite oxide represented by the general formula (A): LizNi1-x-yCoxMyO2, where 0.10≤x≤0.20, 0≤y≤0.10, 0.97≤z≤1.20, and M represents at least one element selected from among Mn, V, Mg, Mo, Nb, Ti and Al); the slurry is washed with water by stirring; and after filtration, the resulting material is subjected to a heat treatment at a temperature of from 120° C. to 550° C. (inclusive) in an oxygen atmosphere having an oxygen concentration of 80% by volume or more.