Lithium-nickel-cobalt-maganese containing composite oxide, material for positive electrode active material for lithium secondary battery, and methods for producing these
申请人:Suhara Manabu
公开号:US20060083989A1
公开(公告)日:2006-04-20
Coagulated particles of nickel-cobalt-manganese hydroxide wherein primary particles are coagulated to form secondary particles are synthesized by allowing an aqueous solution of a nickel-cobalt-manganese salt, an aqueous solution of an alkali-metal hydroxide, and an ammonium-ion donor to react under specific conditions; and a lithium-nickel-cobalt-manganese-containing composite oxide represented by a general formula, Li
p
Ni
x
Mn
1-x-y
Co
y
O
2-q
F
q
(where 0.98≦p≦1.07, 0.3≦x≦0.5, 0.1≦y≦0.38, and 0≦q≦0.05), which is a positive electrode active material for a lithium secondary cell having a wide usable voltage range, a charge-discharge cycle durability, a high capacity and high safety, is obtained by dry-blending coagulated particles of nickel-cobalt-manganese composite oxyhydroxide formed by making an oxidant to act on the coagulated particles with a lithium salt, and firing the mixture in an oxygen-containing atmosphere.
通过在特定条件下允许一种镍钴锰盐的水溶液,一种碱金属氢氧化物的水溶液和一种铵离子供体反应,合成了凝聚的镍钴锰羟化物颗粒,其中初级颗粒凝聚形成次级颗粒;通过将氧化剂作用于镍钴锰复合氢氧化物的凝聚颗粒并与锂盐干混,然后在含氧气氛中烧结混合物,得到了一种锂镍钴锰复合氧化物,其通式为LipNixMn1-x-yCoyO2-qFq(其中0.98≦p≦1.07,0.3≦x≦0.5,0.1≦y≦0.38,0≦q≦0.05),它是一种用于锂二次电池的正极活性材料,具有广泛的可用电压范围,充放电循环寿命长,高容量和高安全性。