A novel high-voltage lithium cobalt oxide positive electrode material and its preparation method
A cathode material, lithium cobalt oxide technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of not completely preventing Co from contacting the electrolyte, increasing lithium ion transmission resistance, and detrimental to battery performance. The effect of industrial production, avoiding material particle stratification, ensuring cycle performance and safety performance
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Embodiment 1
[0029] Dissolve a certain amount of cobalt nitrate to obtain 190L of 0.2mol / L salt solution, prepare 14L of manganese nitrate solution with a concentration of 0.1mol / L, prepare 197L of sodium hydroxide alkali solution with a concentration of 0.4mol / L, and prepare a concentration of 0.1mol / L ammonia solution as a complexing agent. The cobalt nitrate solution, the manganese nitrate solution, the sodium hydroxide alkali solution and the complexing agent are respectively put into different containers, wherein the cobalt nitrate solution is put into a stirring container.
[0030] Continuously add the manganese nitrate solution into the cobalt nitrate solution at a flow rate of 1L / h, and stir to obtain a mixed salt solution. At the same time, add the mixed salt solution, the alkali solution and the complexing agent into the reactor with stirring for reaction , where the mixed salt solution and alkali solution were added to the reactor at a flow rate of 20 L / h and 19.5 L / h, respecti...
Embodiment 2
[0033] Dissolve a certain amount of cobalt sulfate to obtain 180L of 0.1mol / L salt solution, prepare 30L of manganese sulfate solution with a concentration of 0.1mol / L, prepare 210L of sodium hydroxide alkali solution with a concentration of 0.2mol / L, and prepare a concentration of 0.2mol / L ammonia solution as a complexing agent. The cobalt sulfate solution, the manganese sulfate solution, the sodium hydroxide lye and the complexing agent are respectively put into different containers, wherein the cobalt sulfate solution is put into a stirring container.
[0034] The manganese sulfate solution is continuously added to the cobalt sulfate solution at a flow rate of 1L / h, and stirred to obtain a mixed salt solution. At the same time, the mixed salt solution, alkali solution and complexing agent are added to the stirred reactor together for reaction , where the mixed salt solution and alkali solution are added to the reactor at a flow rate of 10L / h and 10L / h, respectively. After...
Embodiment 3
[0038] Dissolve a certain amount of cobalt nitrate to obtain 190L of 0.2mol / L salt solution, prepare 12L of manganese nitrate solution with a concentration of 0.2mol / L, prepare 202L of sodium hydroxide alkali solution with a concentration of 0.4mol / L, and prepare a concentration of 0.1mol / L ammonia solution as a complexing agent. The cobalt nitrate solution, the manganese nitrate solution, the sodium hydroxide alkali solution and the complexing agent are respectively put into different containers, wherein the cobalt nitrate solution is put into a stirring container.
[0039] Continuously add the manganese nitrate solution into the cobalt nitrate solution at a flow rate of 1L / h, and stir to obtain a mixed salt solution. At the same time, add the mixed salt solution, the alkali solution and the complexing agent into the reactor with stirring for reaction , wherein the flow rates of the mixed salt solution and alkali solution added to the reactor were 20 L / h and 20 L / h, respecti...
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