A process for preparing a metal oxide-containing powder that comprises conducting spray pyrolysis that comprises aerosolizing a slurry that comprises solidphase particles in a liquid that comprises at least one precursor compound, which comprises one or more metallic elements of at least one metal oxide, to form droplets of said slurry, and calcining the droplets to at least partially decompose the at least one precursor compound and form the metal oxide-containing powder having a non-hollow morphology.

A positive electrode active material includes secondary particles. The secondary particles include a plurality of primary particles. The primary particles include a lithium-containing composite metal oxide. Inside the secondary particles, an electron conducting oxide is disposed at at least a part of a grain boundary between the primary particles. The electron conducting oxide has a perovskite structure.

Disclosed are a precursor for preparation of a lithium composite transition metal oxide, a method for preparing the same and a lithium composite transition metal oxide obtained from the same. More particularly, the transition metal precursor which has a composition represented by Formula 1 below and is prepared in an aqueous transition metal solution, mixed with a transition metal-containing salt, including an alkaline material, the method for preparing the same and the lithium composite transition metal oxide obtained from the same are disclosed.
Mn.sub.aM.sub.b(OH.sub.1-x).sub.2-yA.sub.y(1) wherein M is at least one selected form the group consisting of Ni, Ti, Co, Al, Cu, Fe, Mg, B, Cr, Zr, Zn and Period II transition metals; A is at least one selected form the group consisting of anions of PO.sub.4, BO.sub.3, CO.sub.3, F and NO.sub.3, and 0.5a1.0; 0b0.5; a+b=1; 0<x<1.0; and 0y0.02.

A process for preparing a metal oxide-containing powder that comprises conducting spray pyrolysis that comprises aerosolizing a slurry that comprises solid-phase particles in a liquid that comprises at least one precursor compound, which comprises one or more metallic elements of at least one metal oxide, to form droplets of said slurry, and calcining the droplets to at least partially decompose the at least one precursor compound and form the metal oxide-containing powder having a non-hollow morphology.

Disclosed are a precursor for preparation of a lithium composite transition metal oxide, a method for preparing the same and a lithium composite transition metal oxide obtained from the same. More particularly, the transition metal precursor which has a composition represented by Formula 1 below and is prepared in an aqueous transition metal solution, mixed with a transition metal-containing salt, including an alkaline material, the method for preparing the same and the lithium composite transition metal oxide obtained from the same are disclosed.

Mn.sub.aM.sub.b(OH.sub.1-x).sub.2-yA.sub.y (1) wherein M is at least one selected form the group consisting of Ni, Ti, Co, Al, Cu, Fe, Mg, B, Cr, Zr, Zn and Period II transition metals; A is at least one selected form the group consisting of anions of PO.sub.4, BO.sub.3, CO.sub.3, F and NO.sub.3, and 0.5a1.0; 0b0.5; a+b=1; 0<x<1.0; and 0y0.02.

Disclosed are a precursor for preparation of a lithium composite transition metal oxide, a method for preparing the same and a lithium composite transition metal oxide obtained from the same. More particularly, the transition metal precursor which has a composition represented by Formula 1 below and is prepared in an aqueous transition metal solution, mixed with a transition metal-containing salt, including an alkaline material, the method for preparing the same and the lithium composite transition metal oxide obtained from the same are disclosed.
Mn.sub.aM.sub.b(OH.sub.1-x).sub.2-yA.sub.y(1) wherein M is at least one selected form the group consisting of Ni, Ti, Co, Al, Cu, Fe, Mg, B, Cr, Zr, Zn and Period II transition metals; A is at least one selected form the group consisting of anions of PO.sub.4, BO.sub.3, CO.sub.3, F and NO.sub.3, and 0.5a1.0; 0b0.5; a+b=1; 0<x<1.0; and 0y0.02.

A positive electrode active material includes secondary particles. The secondary particles include a plurality of primary particles. The primary particles include a lithium-containing composite metal oxide. Inside the secondary particles, an electron conducting oxide is disposed at at least a part of a grain boundary between the primary particles. The electron conducting oxide has a perovskite structure.

A composition of matter is disclosed which is a perovskite having a composition A.sub.2xA.sub.xB.sub.2yB.sub.yO.sub.6, where A is a praseodymium (Pr) element at the A-site of the perovskite, A is a strontium (Sr) element at the A-site of the perovskite, B is a cobalt (Co) element at the B-site of the perovskite, and B is a manganese (Mn) element at the B-site of the perovskite, and where 0<x 1 and 0<y<2. Also disclosed is an electrode material Conformally coated with the composition of matter. Also disclosed are methods of producing the composition of matter and conformally coating the electrode material. Also disclosed an electrode is conformally coated with a praseodymium strontium manganese perovskite and a method for the coating.

A process for preparing a metal oxide-containing powder that comprises conducting spray pyrolysis that comprises aerosolizing a slurry that comprises solid-phase particles in a liquid that comprises at least one precursor compound, which comprises one or more metallic elements of at least one metal oxide, to form droplets of said slurry, and calcining the droplets to at least partially decompose the at least one precursor compound and form the metal oxide-containing powder having a non-hollow morphology.

[Summary] A positive electrode active material is provided to contain: a solid solution lithium-containing transition metal oxide (A) represented by Li.sub.1.5[Ni.sub.aCo.sub.bMn.sub.c[Li].sub.d]O.sub.3 (where a, b, c and d satisfy the relations of a+b+c+d=1.5, 0.1<d0.4, 1.1a+b+c<1.4, 0.2a0.7 and 0<b/a<1); and a lithium-containing transition metal oxide (B) represented by LiM.sub.XMn.sub.2XO.sub.4 (where M represents Cr or Al, and x satisfies the relation of 0x<2).