US 11,742,483 B2
Nickel manganese composite hydroxide and method for producing same, positive electrode active material for nonaqueous electrolyte secondary battery and method for producing same, and nonaqueous electrolyte secondary battery
Takuma Nakamura, Niihama (JP); Haruki Kaneda, Niihama (JP); Takehide Honma, Niihama (JP); Takaaki Ando, Niihama (JP); and Koji Yamaji, Niihama (JP)
Assigned to SUMITOMO METAL MINING CO., LTD., Tokyo (JP)
Filed by SUMITOMO METAL MINING CO., LTD., Tokyo (JP)
Filed on Jul. 15, 2022, as Appl. No. 17/865,714.
Application 17/865,714 is a division of application No. 16/320,748, granted, now 11,476,460, previously published as PCT/JP2017/021009, filed on Jun. 6, 2017.
Claims priority of application No. 2016-150620 (JP), filed on Jul. 29, 2016.
Prior Publication US 2022/0399544 A1, Dec. 15, 2022
Int. Cl. H01M 4/525 (2010.01); C01G 53/00 (2006.01); C01G 53/04 (2006.01); H01M 4/505 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/525 (2013.01) [C01G 53/00 (2013.01); C01G 53/006 (2013.01); C01G 53/04 (2013.01); C01G 53/50 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); C01P 2002/74 (2013.01); C01P 2004/03 (2013.01); C01P 2004/50 (2013.01); C01P 2004/51 (2013.01); C01P 2004/54 (2013.01); C01P 2004/61 (2013.01); C01P 2004/64 (2013.01); C01P 2006/11 (2013.01); C01P 2006/14 (2013.01); C01P 2006/16 (2013.01); C01P 2006/40 (2013.01); H01M 2004/028 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A nickel-manganese composite hydroxide represented by General Formula (1): NixMnyMz(OH)2+α (in Formula (1), M is at least one additional element selected from Co, Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, Fe, and W; and x, y, z, and α satisfy 0.1≤x≤0.8, 0.1≤y≤0.6, 0≤z≤0.8, x+y+z=1.0, and 0≤α≤0.4) and containing a secondary particle formed of a plurality of flocculated primary particles, wherein
the primary particles have an aspect ratio of at least 3, and at least some of the primary particles are disposed radially in a direction from a central part of the secondary particle to an outer circumference thereof, and
the secondary particle has a ratio (I(101)/I(001)) of a diffraction peak intensity I(101) of a 101 plane to a diffraction peak intensity I(001) of a 001 plane, measured by an X-ray diffraction measurement, of up to 0.15.
 
5. A method for producing a nickel-manganese composite hydroxide represented by General Formula (1): NixMnyMz(OH)2+α (in Formula (1), M is at least one additional element selected from Co, Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, Fe, and W; and x, y, z, and α satisfy 0.1≤x≤0.8, 0.1≤y≤0.6, 0≤z≤0.8, x+y+z=1.0, and 0≤α≤0.4) and containing a secondary particle formed of a plurality of flocculated primary particles,
the method comprising a crystallization process of forming a nickel-manganese composite hydroxide by neutralizing a salt containing at least nickel and a salt containing at least manganese in an aqueous reaction solution, wherein
in the crystallization process, a dissolved nickel concentration in the aqueous reaction solution is controlled in a range of at least 300 mg/L and up to 1,500 mg/L, a dissolved oxygen concentration is controlled in a range of at least 0.5 mg/L and up to 3.5 mg/L, and a stirring power applied to the aqueous reaction solution is controlled in a range of at least 4 kW/m3 and up to 8 kW/m3.