High practicality lithium nickel manganese oxide and preparation method thereof
A practical technology of lithium nickel manganate, applied in the field of lithium ion power battery cathode materials, can solve the problems of material cycle performance not meeting commercialization requirements, surface coating agent doping, affecting battery preparation and other problems, achieving easy implementation, The effect of improving peel strength and suppressing side reactions
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Embodiment 1
[0025] Add the manganese dioxide, nickelous oxide, lithium carbonate and 1% stearic acid in the metering ratio into the mixer, and the ball milling media are zirconia balls with diameters of D20mm, D15mm, D10mm, and D5mm respectively, and the ratio of the balls is D20mm: D15mm: D10mm: D5mm=1:1:1:1, the ball-to-material ratio is 6:1, the speed is 100rpm, the material is mixed for 7 hours, and the material is pre-calcined at 300°C for 1 hour The corresponding precursors were prepared. The obtained precursor was calcined in a muffle furnace at a calcination temperature of 700°C to 1000°C, the number of calcination steps was 2 times, calcination at 700°C for 6 hours, and then calcination at 900°C for 6 hours, the cumulative calcination time was 12 hours, and the annealing temperature was 600°C, heat preservation for 15 hours, and natural cooling, the target lithium nickel manganese oxide can be obtained, and the specific surface area of the material is 0.5m 2 / g. The material i...
Embodiment 2
[0027] Add trimanganese tetroxide, nickelous oxide, lithium hydroxide and 1% ammonium polyacrylate into the mixer, and the ball milling media are zirconia balls with diameters of D20mm, D15mm, D10mm, and D5mm respectively. The mass ratio is D20mm: D15mm: D10mm: D5mm=0.5:0.6:0.6:1, the ball-to-material ratio is 4:1, the mixture is mixed for 5 hours, the speed is 150rpm, and the material is calcined in the obtained precursor gas muffle furnace, The calcination process is 800°C for 2 hours, 850°C for 2 hours, 900°C for 10 hours, the annealing temperature is 650°C, and the temperature is kept for 20 hours, and the temperature is naturally lowered. Specific surface area Lithium nickel manganese oxide, the specific surface area of the material is 0.3m 2 / g. The material is ground, dispersed, and sieved, and then placed in a chemical vapor deposition tube furnace for chemical vapor deposition reaction, and nitrogen carrier gas containing ethane (volume ratio of toluene 10%) is intr...
Embodiment 3
[0029] Add the manganese dioxide, nickelous oxide, lithium hydroxide and 3% stearic acid into the mixer, and the ball milling media are zirconia balls with diameters of D20mm, D15mm, D10mm, and D5mm respectively. The ratio is D20mm: D15mm: D10mm: D5mm=1:0.5:0.5:1, the ball-to-material ratio is 3:1, the rotation speed is 100rpm, and the mixture is mixed for 5 hours. The obtained precursor is pre-calcined at 400°C for 1 hour, and then The obtained precursor is calcined. The calcination process is 800°C for 2 hours, 850°C for 2 hours, 900°C for 2 hours, 950°C for 12 hours, annealing temperature of 700°C, heat preservation for 20 hours, and natural cooling to obtain The target is low specific surface area lithium nickel manganese oxide with a certain degree of cation disorder and structural dislocation, and the specific surface area of the material is 0.35m 2 / g. The material is ground, dispersed, and sieved, and then placed in a chemical vapor deposition tube furnace for chemic...
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