High-voltage lithium cobalt oxide positive electrode material and preparation method thereof
A cathode material, lithium cobalt oxide technology, used in battery electrodes, circuits, electrical components, etc., can solve problems such as internal structure collapse, rate deterioration, and accelerated reactions
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[0029] Example 1
[0030] Prepare 475L cobalt chloride solution with a concentration of 2mol / L, prepare 20L nickel-manganese nitrate binary mixed solution with a concentration of 2mol / L (Ni:Mn=1:3), and prepare 20L lanthanum nitrate solution with a concentration of 0.5mol / L , Prepare a sodium carbonate solution with a concentration of 2mol / L as a precipitant. The cobalt nitrate solution, the nickel-manganese binary solution and the sodium carbonate solution were put into separate containers, and the cobalt nitrate solution was put into a container with stirring.
[0031] The nickel-manganese binary solution is continuously added to the cobalt nitrate solution and stirred to obtain a mixed salt solution. At the same time, the mixed salt solution and the sodium carbonate solution are co-currently fed into a stirred reactor for reaction to obtain a precursor slurry. During the whole reaction process, the reaction temperature was 50°C and the reaction time was 20h. The precursor slur...
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[0034] Example 2
[0035] Prepare 970L cobalt sulfate solution with a concentration of 1mol / L, prepare 20L nickel-manganese sulfate binary mixed solution with a concentration of 1mol / L (Ni:Mn=1:3), prepare 50L yttrium nitrate solution with a concentration of 0.2mol / L, A sodium carbonate solution with a concentration of 1 mol / L was prepared as a precipitation agent. The cobalt sulfate solution, the nickel-manganese binary solution and the sodium carbonate solution were put into different containers, and the cobalt sulfate solution was put into a container with stirring.
[0036] The nickel-manganese binary solution is continuously added to the cobalt sulfate solution and stirred to obtain a mixed salt solution. At the same time, the mixed salt solution and the sodium carbonate solution are co-currently fed into a stirred reactor for reaction to obtain a precursor slurry. During the whole reaction process, the reaction temperature was 40°C and the reaction time was 30h. The precurs...
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[0039] Example 3
[0040] Prepare 186L of cobalt acetate solution with a concentration of 0.5mol / L, prepare 12L of nickel-manganese acetate binary mixed solution with a concentration of 0.5mol / L (Ni:Mn=1:3), and prepare a samarium nitrate solution with a concentration of 0.1mol / L 10L, prepare a sodium carbonate solution with a concentration of 0.5mol / L as a precipitation agent. The cobalt acetate solution, the nickel-manganese binary solution and the sodium carbonate solution were put into separate containers, and the cobalt acetate solution was put into a container with stirring.
[0041] The nickel-manganese binary solution is continuously added to the cobalt acetate solution and stirred to obtain a mixed salt solution. At the same time, the mixed salt solution and the sodium carbonate solution are co-currently fed into a stirred reactor for reaction to obtain a precursor slurry. In the whole reaction process, the reaction temperature was 60°C, and the reaction time was 50h. Th...
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