Lithium ion battery positive electrode material modified by reactive melt infiltration and preparation method
A technology for lithium ion batteries and cathode materials, which is applied in the field of cathode materials and preparation of secondary batteries, can solve problems such as unsatisfactory material properties, and achieves promoting commercial application, improving ionic conductivity and electronic conductivity, and improving cycle. The effect of stability
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Embodiment 1
[0020] 0.03513g of aluminum isopropoxide and 0.00433g of lithium hydroxide, dissolved in a mixed solvent of absolute ethanol and dehydrated with a volume ratio of 1:1, stirred on a magnetic heating stirrer at 50°C to remove the dehydrated ethanol and dehydrated Mix solvents to form a gel; use 2g of ordinary lithium-ion batteries with lithium-rich manganese-based positive electrode materials Li 1.2 mn 0.533 co 0.133 Ni 0.133 o 2 Added to the above gel, the ratio of the molar amount of Al to the total molar amount of metal Mn, Co and Ni in the lithium-rich manganese-based positive electrode material is 1:100; after stirring at 50°C for 3h, drying at 70°C to obtain The solid powder material was then heat-treated at 600°C for 5 hours in an air atmosphere, and cooled to room temperature with the furnace to obtain a coated and modified lithium-rich manganese-based cathode material Li 1.2 mn 0.533 co 0.133 Ni 0.133 o 2 .
[0021] The coated and modified lithium-rich manganes...
Embodiment 2
[0028] 0.04888g of titanium tetraisopropoxide and 0.04842g of lithium acetate, dissolved in a mixed solvent of absolute ethanol and dehydrated with a volume ratio of 3:2, stirred on a magnetic heating stirrer at 45°C to remove the dehydrated alcohol and dehydrated Mix solvents to form a gel; use 2g of ordinary lithium-ion batteries with lithium-rich cathode materials Li 1.2 mn 0.533 co 0.133 Ni 0.133 o 2 Added to the above gel, the ratio of the molar amount of Ti to the total molar amount of metal Mn, Co and Ni in the lithium-rich manganese-based positive electrode material is 3:100; after stirring at 45°C for 4h, it is dried at 65°C to obtain The solid powder material was then heat-treated at 800°C for 3 hours in the air atmosphere, and cooled to room temperature with the furnace to obtain a coated and modified lithium-rich manganese-based cathode material Li 1.2 mn 0.533 co 0.133 Ni 0.133 o 2 .
[0029] The coated and modified lithium-rich manganese-based cathode ma...
Embodiment 3
[0031] 0.04084g of aluminum isopropoxide and 0.02504g of lithium hydroxide, dissolved in a mixed solvent of absolute ethanol and dehydrated with a volume ratio of 1:1, stirred on a magnetic heating stirrer at 50°C to remove the dehydrated alcohol and dehydrated Mix solvents to form a gel; 2g of ordinary lithium-ion batteries with high-nickel ternary cathode material Li Ni 0.6 mn 0.2 co 0.2 o 2 Added to the above gel, the ratio of the molar amount of Al to the total molar amount of metal Mn, Co and Ni in the high-nickel ternary positive electrode material is 1:20; after stirring at 50°C for 3h, it is dried at 70°C to obtain The solid powder material was then heat-treated at 300°C for 24 hours in an air atmosphere, and cooled to room temperature with the furnace to obtain a coated and modified high-nickel ternary cathode material Li Ni 0.6 mn 0.2 co 0.2 o 2 .
[0032] The coated and modified high-nickel ternary positive electrode material Li Ni prepared by the above metho...
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