Patent ID: 8663507

Claim:
A pulverulent compound of the formula; Ni b M1 c M2 d (O) x (OH) y (SO 4 ) z , M1 denoting at least one element selected from the group consisting of Fe, Co, Cr, Mg, Cu and mixtures thereof, M2 is Mn and 0.3≦b≦0.94, 0.02≦c≦0.5, 0≦d≦0.5, 0.01≦x≦0.9, 1.1≦y≦1.9 and 0.001≦z≦0.03, wherein secondary particles composed of a multiplicity of primary particles have a compressive strength of at least 50 MPa, and a normalized width of the particle distribution, measured according to the formula (1) D ⁢ ⁢ 90 - D ⁢ ⁢ 10 D ⁢ ⁢ 50 ( 1 ) in which D denotes diameters of the secondary particles, is less than 1.4.