公开(公告)号：US20160308207A1

公开(公告)日：2016-10-20

申请号：US15038543

申请日：2015-01-22

Applicant: SUMITOMO METAL MINING CO., LTD.

Inventor： Mitsuru YAMAUCHI ,  Kazuomi RYOSHI ,  Shuzo OZAWA ,  Ryozo USHIO

IPC: H01M4/525 ,  C01G51/00 ,  H01M10/0525 ,  C01G51/04

CPC classification number: H01M4/525 ,  C01G51/04 ,  C01G51/42 ,  C01P2004/03 ,  C01P2004/32 ,  C01P2004/50 ,  C01P2004/51 ,  C01P2004/53 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2006/11 ,  C01P2006/40 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/028

Abstract: Obtaining cobalt hydroxide particles having a high filling property and a high density. The cobalt hydroxide particles used as a precursor for a positive electrode active material of a non-aqueous electrolyte secondary battery, including spherical secondary particles of flocculated primary particles, wherein average aspect ratio of the secondary particles is 0.7 or more, average particle diameter is 5 to 35 μm, and a value of (d90-d10)/MV indicating a dispersion of a particle size distribution is 0.6 or less, wherein, in sectional observation of the secondary particles, a ratio (N/L) of number (N) of gaps with maximum long diameter 0.3 μm or more recognized in particles of the secondary particles with sectional long diameter 3 μm or more to sectional long diameter (L) of the secondary particles is 1.0 or less, and also, maximum long diameter of the gaps is 15% or less of sectional long diameter of the secondary particles.

Abstract translation: 获得具有高填充性和高密度的氢氧化钴颗粒。 用作非水电解质二次电池正极活性物质的前体的氢氧化钴粒子，其包含絮凝的一次粒子的球状二次粒子，二次粒子的平均长径比为0.7以上，平均粒径为5 〜35μm，表示粒径分布分散的（d90-d10）/ MV的值为0.6以下，其中，在二次粒子的截面观察中，数（N）的比（N / L） 在二次粒子的截面长径（L）为3倍以上的二次粒子的粒子中，最大长径为0.3μm以上的间隙为1.0以下，间隙的最大长径为 为二次粒子的截面长径的15％以下。