Preparation method of lithium-enriched manganese-based material of lithium-ion battery
A lithium-ion battery, lithium-rich manganese-based technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of complex preparation process, high preparation cost, large particle size, etc., and achieve simple preparation, uniform particles, Small size effect
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[0021] Preparation of lithium-rich manganese-based materials Li by spatial confinement of polyurethane sponge 1.2 mn 0.54 Ni 0.13 co 0.13 o 2 And apply it as lithium-ion battery cathode material, the preparation method of lithium-rich manganese-based material comprises the following steps:
[0022] Step 1. Mole ratio n Li :n Mn :n Ni :n Co =1.2-1.3:0.54:0.13:0.13, the corresponding metal salt is dissolved in deionized water, stirred, dissolved to obtain a mixed solution;
[0023] Step 2. Submerge the polyurethane sponge into the mixed solution obtained in step 1, so that the polyurethane sponge can fully absorb the mixed solution;
[0024] Step 3. Transfer the polyurethane sponge that fully absorbs the mixed solution in step 2 to a vacuum freeze-drying box for freeze-drying, and freeze-dry for 4-16 hours;
[0025] Step 4. Place the sample obtained in step 3 into a muffle furnace for pre-sintering at 350-550°C for 3-8 hours, cool naturally to room temperature, and grin...
Embodiment 1
[0030] Embodiment 1: lithium-rich manganese-based cathode material Li 1.2 mn 0.54 Ni 0.13 co 0.13 o 2 preparation and characterization
[0031] Dissolve a certain amount of lithium acetate, manganese acetate, nickel acetate and cobalt acetate in deionized water according to the molar ratio to obtain a mixed solution, and immerse the polyurethane sponge in the above mixed solution to make the polyurethane sponge fully absorb the mixed solution. The polyurethane sponge after the solution was transferred to a vacuum freeze-drying oven for 10 hours to freeze-dry, and the obtained sample was pre-sintered in a muffle furnace at 450°C for 6 hours, cooled naturally to room temperature, and ground evenly. The ground sample was placed in a muffle furnace at 850°C for 12 hours, cooled to room temperature naturally, and ground evenly to obtain Li 1.2 mn 0.54 Ni 0.13 co 0.13 o 2 Material.
[0032] The product was subjected to Cu Kα rays (wavelength The number of scanning steps ...
Embodiment 2
[0036] Embodiment 2: lithium-rich manganese-based cathode material Li 1.2 mn 0.54 Ni 0.13 co 0.13 o 2 preparation and characterization
[0037] Dissolve a certain amount of lithium nitrate, manganese oxalate, nickel chloride and cobalt nitrate in deionized water in molar ratio to obtain a mixed solution, and immerse the polyurethane sponge in the above mixed solution, so that the polyurethane sponge can fully absorb the mixed solution and will fully absorb The polyurethane sponge after the mixed solution was transferred to a vacuum freeze-drying oven for 12 hours to freeze-dry, and the obtained sample was pre-sintered in a muffle furnace at 350°C for 6 hours, cooled naturally to room temperature, and ground evenly. The ground sample was placed in a muffle furnace at 950 °C for 6 h, cooled to room temperature naturally, and ground evenly to obtain Li 1.2 mn 0.54 Ni 0.13 co 0.13 o 2 Material.
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