Layered positive electrode material for lithium-ion battery and preparation method of layered positive electrode material
A technology for lithium-ion batteries and positive electrode materials, applied in the field of lithium-ion battery layered positive electrode materials and its preparation, can solve the problems of material structure deterioration, performance attenuation, lattice lithium loss, etc., and achieve stable crystal structure and surface residual alkali content Low, easy-to-scale production effect
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Embodiment 1
[0021] A preparation method of a lithium-ion battery layered positive electrode material, comprising the following steps:
[0022] S1, the Ni 0.8 co 0.1 mn 0.1 (OH) 2 , lithium hydroxide monohydrate and nano-alumina are mixed evenly in a high-speed mixer, Li ions and Ni 0.8 co 0.1 mn 0.1 (OH) 2 The molar ratio of nano-alumina and Ni is 1.04:1 0.8 co 0.1 mn 0.1 (OH) 2 The molar ratio is 0.06:1, and the unmodified powder is obtained by sintering at 790°C for 12 hours under pure oxygen atmosphere;
[0023] S2. Stir the unmodified powder with pure water at 60°C for 3 minutes, the mass volume ratio (g / L) of the unmodified powder to water is 1000:1, centrifuge, dry at 100°C, and pulverize to obtain a washed powder ;
[0024] S3. Add lithium dioxalate borate into ethanol to dissolve, then add water-washed powder and mix, the mass ratio of ethanol to water-washed powder is 2:3, then stir and evaporate at 90°C, and sinter at 760°C for 10h under pure oxygen atmosphere to obt...
Embodiment 2
[0027] A preparation method of a lithium-ion battery layered positive electrode material, comprising the following steps:
[0028] S1, the Ni 0.82 co 0.12 mn 0.6 (OH) 2 , lithium hydroxide monohydrate and nano zirconia are mixed evenly in a high-speed mixer, Li ions and Ni 0.82 co 0.12 mn 0.6 (OH) 2 The molar ratio of nano zirconia and Ni is 1.05:1 0.82 co 0.12 mn 0.6 (OH) 2 The molar ratio is 0.01:1, under pure oxygen atmosphere, sintering at 770°C for 20h to obtain unmodified powder;
[0029] S2. Stir the unmodified powder with pure water at 60°C for 3 minutes, the mass volume ratio (g / L) of the unmodified powder to water is 700:1, centrifuge, dry at 100°C, and pulverize to obtain a washed powder ;
[0030] S3. Add lithium dioxalate borate into ethanol to dissolve, then add water-washed powder to mix, the mass ratio of ethanol to water-washed powder is 2:3, then stir and evaporate at 90°C, and sinter at 750°C for 8h under pure oxygen atmosphere to obtain a lithiu...
Embodiment 3
[0033] A preparation method of a lithium-ion battery layered positive electrode material, comprising the following steps:
[0034] S1, the Ni 0.85 co 0.1 mn 0.5 (OH) 2 , lithium hydroxide monohydrate and nano-magnesium oxide are mixed evenly in a high-speed mixer, Li ions and Ni 0.85 co 0.1 mn 0.5 (OH) 2 The molar ratio of 1.03:1, nano magnesium oxide and Ni 0.85 co 0.1 mn 0.5 (OH) 2 The molar ratio is 0.03:1, under pure oxygen atmosphere, sintering at 730°C for 15h to obtain unmodified powder;
[0035] S2. Stir the unmodified powder with pure water at 60°C for 3 minutes, the mass volume ratio (g / L) of the unmodified powder to water is 500:1, centrifuge, dry at 100°C, and pulverize to obtain a washed powder ;
[0036] S3. Add lithium dioxalate borate into ethanol to dissolve, then add water-washed powder and mix, the mass ratio of ethanol to water-washed powder is 2:3, then stir and evaporate at 90°C, and sinter at 710°C for 5h under pure oxygen atmosphere to obtai...
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