首页>
外国专利>
Nickel-cobalt composite hydroxide and method and device for producing same, cathode active material for non-aqueous electrolyte secondary battery and method for producing same, and non-aqueous electrolyte secondary battery
Nickel-cobalt composite hydroxide and method and device for producing same, cathode active material for non-aqueous electrolyte secondary battery and method for producing same, and non-aqueous electrolyte secondary battery
To improve cycling characteristics of a non-aqueous electrolyte secondary battery by obtaining a nickel-cobalt composite hydroxide having a sharp particle size distribution as a precursor, a slurry including a nickel-cobalt composite hydroxide obtained by continuously supplying an aqueous solution that includes at least nickel and cobalt, an ammonium ion donor aqueous solution and a caustic alkali aqueous solution to a reaction vessel and reacting, is continuously extracted and separated into a large particle size portion and s small particle size portion by classification, and the small particle size portion is continuously returned to the reaction vessel. As a result, a nickel-cobalt composite hydroxide is obtained that is expressed by the general formula: Ni1-x-yCoxMy(OH)2 (where, 0.05≤x≤0.50, 0≤y≤0.10, 0.05≤x+y≤0.50, and M is at least one kind of metal element selected from among Al, Mg, Mn, Ti, Fe, Cu, Zn and Ga, and that satisfies the relationships (D50−D10)/D50≤0.30, and (D90−D50)/D50≤0.30 among D10, D50 and D90 of this composite hydroxide.
展开▼
机译:为了通过获得具有尖锐的粒度分布的镍-钴复合氢氧化物作为前体来改善非水电解质二次电池的循环特性,包含通过连续供应至少包含至少10%的水溶液而获得的包含镍-钴复合氢氧化物的浆料。通过分级将镍和钴,铵离子供体水溶液和苛性碱水溶液进行反应并连续萃取,并通过分级将其分离成大粒径部分和小粒径部分。连续返回到反应容器中。结果,获得了镍-钴复合氢氧化物,其由以下通式表示:Ni 1-xy Sub> Co x Sub> M y Sub>( OH) 2 Sub>(其中0.05≤x≤0.50、0≤y≤0.10、0.05≤x +y≤0.50,并且M是选自Al,Mg, Mn,Ti,Fe,Cu,Zn和Ga满足该复合氢氧化物的D10,D50和D90之间的(D50-D10)/D50≤0.30和(D90-D50)/D50≤0.30的关系。
展开▼