A kind of positive electrode material of lithium ion battery and preparation method thereof
A lithium-ion battery, cathode material technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of potential safety hazards, high manufacturing costs, poor rate performance, etc., and achieve good cycle performance, regular structure, and uniform mixing. Effect
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Embodiment 1
[0043] Preparation chemical formula is LiNi 0.5 mn 1.47 Lu 0.03 o 4 lithium nickel manganese oxide cathode material. First, weigh 1 mol of lithium nitrate, 0.5 mol of nickel nitrate, 1.47 mol of manganese nitrate, 0.03 mol of lutetium sulfate and 3 mol of ammonium oxalate into 500 ml of deionized water according to the stoichiometric ratio, and stir at 60°C until a wet gel is obtained;
[0044]Put the wet gel in a vacuum drying oven and dry it at 110°C to obtain a dry gel. Then transfer the dry gel to a muffle furnace and pre-sinter at 400°C for 4 hours. The heating rate for pre-sintering is 2°C / s, calcined at a rate of 1°C / s to 800°C for 15 hours, and supplemented with oxygen in time.
[0045] Naturally cool to room temperature, grind and sieve to obtain high-performance lithium-ion battery cathode material.
[0046] Then, the obtained materials were assembled into a button battery according to the above method, and the constant current charge and discharge performance ...
Embodiment 2
[0048] Preparation chemical formula is LiNi 0.5 mn 1.48 Lu 0.01 Zr 0.01 o 4 lithium nickel manganese oxide cathode material. First, weigh 1 mol of lithium sulfate, 0.5 mol of nickel acetate, 1.48 mol of manganese nitrate, 0.01 mol of lutetium chloride, 0.01 mol of zirconium nitrate and 3 mol of ammonium malate into 500 ml of deionized water according to the stoichiometric ratio, and stir at 80°C until get a wet gel;
[0049] Put the wet gel in a vacuum drying oven and dry it at 110°C to obtain a dry gel. Then transfer the dry gel to a muffle furnace and pre-sinter at 400°C for 4 hours. The heating rate for pre-sintering is 10°C / s, calcined at a rate of 10°C / s to 900°C for 15 hours, and supplemented with oxygen in time.
[0050] Naturally cool to room temperature, grind and sieve to obtain high-performance lithium-ion battery cathode material.
[0051] Then, the obtained materials were assembled into a button battery according to the above method, and the constant curre...
Embodiment 3
[0053] Preparation chemical formula is LiNi 0.5 mn 1.47 Lu 0.01 Zr 0.01 Yb 0.01 o 4 lithium nickel manganese oxide cathode material. First weigh 1mol of lithium sulfate, 0.5mol of nickel nitrate, 1.47mol of manganese acetate, 0.01mol of lutetium sulfate, 0.01mol of zirconium nitrate, 0.01mol of ytterbium chloride and 3mol of ammonium citrate into 500ml of deionized water according to the stoichiometric ratio. Stir at 70°C until a wet gel is obtained;
[0054] Put the wet gel in a vacuum drying oven and dry it at 110°C to obtain a dry gel. Then transfer the dry gel to a muffle furnace and pre-sinter at 300°C for 5 hours. The heating rate for pre-sintering is 5°C / s, calcined at a rate of 6°C / s to 900°C for 15 hours, and supplemented with oxygen in time.
[0055] Naturally cool to room temperature, grind and sieve to obtain high-performance lithium-ion battery cathode material.
[0056] Then, the obtained materials were assembled into a button battery according to the ab...
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