公开(公告)号：US20210039960A1

公开(公告)日：2021-02-11

申请号：US17083411

申请日：2020-10-29

Applicant: SUMITOMO METAL MINING CO., LTD.

Inventor： Takehide HONMA ,  Koji YAMAJI ,  Ryozo USHIO

IPC: C01G53/00 ,  H01M4/525 ,  H01M4/485 ,  H01M4/36 ,  H01M4/131 ,  H01M10/052 ,  H01M4/505 ,  H01M10/0525

Abstract: Provided is a cathode active material for a non-aqueous electrolyte secondary battery that improves the cycling characteristic and high-temperature storability without impairing the charge/discharge capacity and the output characteristics. A nickel cobalt containing composite hydroxide is obtained by using a batch type crystallization method in which a raw material aqueous solution that includes Ni, Co and Mg is supplied in an inert atmosphere to a reaction aqueous solution that is controlled so that the temperature is within the range 45° C. to 55° C., the pH value is within the range 10.8 to 11.8 at a reference liquid temperature of 25° C., and the ammonium-ion concentration is within the range 8 g/L to 12 g/L. An Al-coated composite hydroxide that is expressed by the general formula: Ni1-x-y-zCoxAlyMgz(OH)2 (where, 0.05≤x≤0.20, 0.01≤y≤0.06, and 0.01≤z≤0.03) is obtained by mixing a slurry that includes the nickel cobalt containing composite hydroxide with a coating aqueous solution that includes Al to form a mixed aqueous solution, and coating the secondary particles with a coating film that includes Al or an Al compound. A cathode active material that is configured so that component elements that include Al are uniformly dispersed in the secondary particles is synthesized using the Al-coated composite hydroxide as a precursor.

公开(公告)号：US20170012288A1

公开(公告)日：2017-01-12

申请号：US15115375

申请日：2015-01-29

Applicant: SUMITOMO METAL MINING CO., LTD.

Inventor： Koji YAMAJI ,  Takehide HONMA ,  Ryozo USHIO

IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/04 ,  C01G53/00 ,  H01M4/505

CPC classification number: H01M4/525 ,  C01G53/00 ,  C01G53/006 ,  C01G53/40 ,  C01G53/50 ,  C01P2004/03 ,  C01P2004/32 ,  C01P2004/45 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2006/11 ,  C01P2006/40 ,  H01M4/043 ,  H01M4/0471 ,  H01M4/505 ,  H01M10/0525 ,  H01M2004/028

Abstract: The object of the present invention is to improve the roundness of nickel-manganese composite hydroxide particles obtained by a crystallization process, and to improve the filling characteristic of cathode active material produced using the nickel-manganese composite hydroxide particles as a precursor. A reaction aqueous solution is formed by supplying a raw material aqueous solution including at least Ni and Mn, an aqueous solution including an ammonium-ion donor, and an alkali solution into a reaction tank, and mixing, then nickel-manganese composite hydroxide particles are crystallized. When doing this, the oxygen concentration inside the reaction tank is controlled to be 3.0% by volume or greater, the temperature of the reaction aqueous solution is controlled to be 35° C. to 60° C., and the nickel-ion concentration is controlled to be 1,000 mg/L or greater. As a result, nickel-manganese composite hydroxide particles are obtained that include secondary particles formed by an aggregation of plural primary particles and expressed by the general formula: NixMnyMt(OH)2+α (where 0.05≦x≦0.95, 0.05≦y≦0.95, 0≦t≦0.20, x+y+t=1, 0≦α≦0.5, and M is one or more elements selected from among Co, Ti, V, Cr, Zr, Nb, Mo, Hf, Ta and W); and the average value of the roundness of cathode active material having a particle size that is 70% the average particle size or more is 0.82 or greater, and the tap density is 2.20 g/cm3 or greater.

Abstract translation: 本发明的目的是提高通过结晶方法获得的镍锰复合氢氧化物颗粒的圆度，并提高使用镍锰复合氢氧化物颗粒作为前体制备的正极活性物质的填充特性。 通过将至少包含Ni和Mn的原料水溶液，包含铵离子供体的水溶液和碱溶液供应到反应罐中并混合，形成反应水溶液，然后将镍锰复合氢氧化物颗粒 结晶。 当这样做时，将反应槽内的氧浓度控制在3.0体积％以上，将反应水溶液的温度控制在35℃〜60℃，镍离子浓度为 控制在1000mg / L以上。 结果，得到包含由多个一次粒子凝集形成的二次粒子并通过以下通式表示的镍锰复合氢氧化物粒子：NixMnyMt（OH）2 +α（0.05≤x≤0.95≤y≤ 0.95，0≤t≤0.20，x + y + t =1,0.0≤α≤0.5，M是选自Co，Ti，V，Cr，Zr，Nb，Mo，Hf，Ta和 W）; 平均粒径为70％以上的正极活性物质的圆度的平均值为0.82以上，振实密度为2.20g / cm 3以上。

公开(公告)号：US20180215629A1

公开(公告)日：2018-08-02

申请号：US15569504

申请日：2016-04-27

Applicant: SUMITOMO METAL MINING CO., LTD.

Inventor： Takehide HONMA ,  Koji YAMAJI ,  Ryozo USHIO

IPC: C01G53/00 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525

CPC classification number: C01G53/44 ,  C01G53/006 ,  C01G53/42 ,  C01P2004/03 ,  C01P2004/39 ,  C01P2004/50 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2004/80 ,  C01P2006/11 ,  C01P2006/12 ,  H01M4/131 ,  H01M4/366 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0525

Abstract: Provided is a cathode active material for a non-aqueous electrolyte secondary battery that improves the cycling characteristic and high-temperature storability without impairing the charge/discharge capacity and the output characteristics. A nickel cobalt containing composite hydroxide is obtained by using a batch type crystallization method in which a raw material aqueous solution that includes Ni, Co and Mg is supplied in an inert atmosphere to a reaction aqueous solution that is controlled so that the temperature is within the range 45° C. to 55° C., the pH value is within the range 10.8 to 11.8 at a reference liquid temperature of 25° C., and the ammonium-ion concentration is within the range 8 g/L to 12 g/L. An Al-coated composite hydroxide that is expressed by the general formula: Ni1-x-y-zCoxAlyMgz(OH)2 (where, 0.05≤x≤0.20, 0.01≤y≤0.06, and 0.01≤z≤0.03) is obtained by mixing a slurry that includes the nickel cobalt containing composite hydroxide with a coating aqueous solution that includes Al to form a mixed aqueous solution, and coating the secondary particles with a coating film that includes Al or an Al compound. A cathode active material that is configured so that component elements that include Al are uniformly dispersed in the secondary particles is synthesized using the Al-coated composite hydroxide as a precursor.