Inorganic compounds

Abstract

The invention relates to a chemical compound of the formula Ni b M1 c M2 d (O) x (OH) y , wherein M1 denotes at least one element from the group consisting of Fe, Co, Mg, Zn, Cu and/or mixtures thereof, M2 denotes at least one element from the group consisting of Mn, Al, B, Ca, Cr and/or mixtures thereof, wherein b≦0.8, c≦0.5, d≦0.5, and x is a number between 0.1 and 0.8, y is a number between 1.2 and 1.9, and x+y=2. A process for the preparation thereof, and the use thereof as a precursor for the preparation of cathode material for secondary lithium batteries are described.

1 .- 37 . (canceled) 
     
     
         38 . A process for producing partly oxidized mixed metal hydroxides having a chemical compound of the formula:
   Ni b M1 c M2 d (O) x (OH) y      wherein   M1 denotes at least one element selected from the group consisting of Fe, Co, Mg, Zn, Cu and mixtures thereof,   M2 denotes at least one element selected from the group consisting of Mn, Al, B, Ca, Cr and mixtures thereof,   b≦0.8   c≦0.5   d≦0.5, and   x is a number between 0.1 and 0.8,   y is a number between 1.2 and 1.9, and x+y=2,   which process comprises the steps of:
 co-precipitation of spherical mixed metal hydroxides from corresponding metal salt solutions, 
 separating off of the co-precipitated mixed metal hydroxide from the suspension, 
 washing of the mixed metal hydroxide, and 
 drying and simultaneous partial oxidation of the mixed metal hydroxide under an oxygen-containing atmosphere at a temperature of greater than 80° C. for at least 3 hours. 
   
     
     
         39 . A process for producing partly oxidized mixed metal hydroxides having a chemical compound of the formula:
   Ni b M1 c M2 d (O) x (OH) y        wherein     M1 denotes at least one element selected from the group consisting of Fe, Co, Mg, Zn, Cu and mixtures thereof,   M2 denotes at least one element from the group consisting of Mn, Al, B, Ca, Cr and mixtures thereof,   b≦0.8   c≦0.5   d≦0.5, and   x is a number between 0.1 and 0.8,   y is a number between 1.2 and 1.9, and x+y=2,   which process comprises the steps of:
 co-precipitation of spherical mixed metal hydroxides from corresponding metal salt solutions, 
 separating off of the co-precipitated mixed metal hydroxide from the suspension, 
 washing of the mixed metal hydroxide, and 
 drying and simultaneous partial oxidation of the mixed metal hydroxide under an oxygen-containing atmosphere at a temperature of greater than 80° C. for at least 3 hours, 
   wherein the average degree of oxidation is 2.1 to 2.8.   
     
     
         40 . A process for producing partly oxidized mixed metal hydroxides having a chemical compound of the formula:
   Ni b M1 c M2 d (O) x (OH) y      wherein   M1 denotes at least one element selected from the group consisting of Fe, Co, Mg, Zn, Cu and mixtures thereof,   M2 denotes at least one element from the group consisting of Mn, Al, B, Ca, Cr and mixtures thereof,   b≦0.8   c≦0.5   d≦0.5, and   x is a number between 0.1 and 0.8,   y is a number between 1.2 and 1.9, and x+y=2,   which process comprises the steps of:
 co-precipitation of spherical mixed metal hydroxides from corresponding metal salt solutions, 
 separating off of the co-precipitated mixed metal hydroxide from the suspension, 
 washing of the mixed metal hydroxide, and 
 drying and simultaneous partial oxidation of the mixed metal hydroxide under an oxygen-containing atmosphere at a temperature of greater than 80° C. for at least 3 hours, 
   wherein the sodium content of partly oxidized mixed metal hydroxides is less than 2,000 ppm.