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IMPURITY CONTAINING CATHODE MATERIAL WITH PREFERRED MORPHOLOGY AND METHOD TO PREPARE FROM IMPURITY CONTAINING METAL CARBONATE
IMPURITY CONTAINING CATHODE MATERIAL WITH PREFERRED MORPHOLOGY AND METHOD TO PREPARE FROM IMPURITY CONTAINING METAL CARBONATE
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机译:具有良好形态的含杂质阴极材料及制备含杂质金属碳酸盐的方法
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摘要
A carbonate precursor compound for manufacturing a lithium metal (M)-oxide powder usable as an active positive electrode material in lithium-ion batteries, M comprising 20 to 90 mol % Ni, 10 to 70 mol % Mn and 10 to 40 mol % Co, the precursor further comprising a sodium and sulfur impurity, wherein the sodium to sulfur molar ratio (Na/S) is 0.4Na/S2. The lithium metal (M)-oxide powder has a particle size distribution with 10 μm≤D50≤20 μm, a specific surface with 0.9≤BET≤5, the BET being expressed in g/cm2, the powder further comprises a sodium and sulfur impurity, wherein the sum (2*Nawt)+Swt of the sodium (Nawt) and sulfur (S wt) content expressed in wt % is more than 0.4 wt % and less than 1.6 wt %, and wherein the sodium to sulfur molar ratio (Na/S) is 0.4Na/S2.
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