A bimodal lithium transition metal oxide based powder for a rechargeable battery, comprising: - a first lithium transition metal oxide based powder, either comprising a material A, having a layered crystal structure consisting of the elements Li, a metal M and oxygen, wherein the Li content is stoichiometrically controlled, wherein the metal M has the formula M=Co 1-a M' a, with 0≤a≤0.05, and wherein M' is either one or more metals of the group consisting of Al, Ga and B, and wherein the material A has an electrical conductivity of less than 10 -4 S/cm, measured under a pressure of 63.7 MPa. or comprising a material B, having a core and a surface layer, the core having a layered crystal structure consisting of the elements Li, a metal M and oxygen, wherein the Li content is stoichiometrically controlled, wherein the metal M has the formula M=Co 1-a M' a, with 0≤a≤0.05, wherein M' is either one or more metals of the group consisting of Al, Ga and B; and the surface layer consisting of a mixture of the elements of the core material and inorganic N-based oxides, wherein N is either one or more metals of the group consisting 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; the first powder having an average particle size of at least 15 μm; and - a second lithium transition metal oxide based powder having the formula Li 1+b N' 1-b O 2, wherein -0.03≤b≤0.25, and N'=Ni x Mn y Co z A d, wherein 0.10≤x≤0.60, 0.30≤y≤0.80, 0.05≤z≤0.20 and 0≤d≤0.10, A being a dopant, the second powder having an average particle size of less than 5 μm, and preferably less than 2 pm; and wherein the ratio of the D50 value of the first powder to the D50 of the second powder is at least 5:1 when the first powder comprises material A. - a first lithium transition metal oxide based powder, either comprising a material A, having a layered crystal structure consisting of the elements Li, a metal M and oxygen, wherein the Li content is stoichiometrically controlled, wherein the metal M has the formula M=Co 1-a M' a, with 0≤a≤0.05, and wherein M' is either one or more metals of the group consisting of Al, Ga and B, and wherein the material A has an electrical conductivity of less than 10 -4 S/cm, measured under a pressure of 63.7 MPa. or comprising a material B, having a core and a surface layer, the core having a layered crystal structure consisting of the elements Li, a metal M and oxygen, wherein the Li content is stoichiometrically controlled, wherein the metal M has the formula M=Co 1-a M' a, with 0≤a≤0.05, wherein M' is either one or more metals of the group consisting of Al, Ga and B; and the surface layer consisting of a mixture of the elements of the core material and inorganic N-based oxides, wherein N is either one or more metals of the group consisting 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; the first powder having an average particle size of at least 15 μm; and - a second lithium transition metal oxide based powder having the formula Li 1+b N' 1-b O 2, wherein -0.03≤b≤0.25, and N'=Ni x Mn y Co z A d, wherein 0.10≤x≤0.60, 0.30≤y≤0.80, 0.05≤z≤0.20 and 0≤d≤0.10, A being a dopant, the second powder having an average particle size of less than 5 μm, and preferably less than 2 pm; and wherein the ratio of the D50 value of the first powder to the D50 of the second powder is at least 5:1 when the first powder comprises material A.