Oxide powders based on binary lithium transition metals used in rechargeable batteries

摘要

Disclosed is an oxide powder based on a binary lithium transition metal used in an electric battery. A powder based on a binary lithium transition metal oxide for a rechargeable battery comprising: A powder based on a first lithium transition metal oxide, which is a material having a layered crystal structure composed of element Li, metal M, and oxygen, the Li content being stoichiometric The metal M has the formula M = Co1-aM′a, where 0 ≦ a ≦ 0.05, and M ′ is composed of Al, Ga, and B. Or a core material and a surface layer, wherein the core has a layered crystal structure composed of the elements Li, metal M, and oxygen. And the Li content is stoichiometrically controlled and the metal M has the formula M = Co1-aM'a Where 0 ≦ a ≦ 0.05, M ′ is one or more metals of the group consisting of Al, Ga, and B, and the surface layer is composed of the core material and N N is composed of Mg, Ti, Fe, Cu, Ca, Ba, Y, Sn, Sb, Na, Zn, Zr, Si, Nb, Mo, Ru , Rh, Pd, Ag, Cd, Sc, Ce, Pr, Nd, Gd, Dy, and Er, and the first powder has an average particle size of at least 5 μm A powder based on a first lithium transition metal oxide having (D50) and having a core and a surface layer and a powder based on a second lithium transition metal oxide having the formula -Li1 + bN'1-bO2. Where 0.10 ≦ b ≦ 0.25 and N ′ = Nix nyCozAd, where 0.10 ≦ x ≦ 0.60, 0.30 ≦ y ≦ 0.80, 0.05 ≦ z ≦ 0.20, and 0 ≦ d ≦ 0. .10, A is a dopant, and the second powder is based on a second lithium transition metal oxide having an average particle size (D50) of less than 5 μm and preferably less than 2 μm. Powder. [Selection] Figure 10