A kind of positive electrode material of lithium ion battery and preparation method thereof
A technology for lithium-ion batteries and positive electrode materials, which can be applied to battery electrodes, circuits, electrical components, etc., and can solve problems such as electrochemical performance that needs to be improved qualitatively
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Embodiment 1
[0030] Step 1: Add 2.28g of oxalic acid to 70mL of aqueous solution dispersed with 2.55g of ammonium metavanadate, stir until the solution is brownish yellow, transfer the brownish yellow solution to a 100mL autoclave, place it in an oven, 180 °C for 12 hours, and after suction filtration, the sample was dried in an oven at 80 °C for 12 hours, and the precursor (NH 4 ) 5 V 2 o 5 . 1g of precursor ((NH 4 )5 V 2 o 5 Dissolve in 300mL aqueous solution, add 0.17g lithium hydroxide monohydrate to the solution, then add 0.2g polyethylene glycol 4000 as a dispersant, stir at room temperature for 2 hours, then heat in an oil bath at 80°C until the solvent evaporates to dryness. The obtained samples were calcined at 450 °C in an air atmosphere for 8 h to obtain crystallized LiV 3 o 8 Nanosheets.
[0031] The second step, weigh 0.5g LiV 3 o 8 , dissolved in 50mL of toluene solution, sonicated for 30min at 300w power, LiV 3 o 8 The dispersion of the nanosheets is better, and...
Embodiment 2
[0033] Step 1: Add 2.28g of oxalic acid to 70mL of aqueous solution dispersed with 2.55g of ammonium metavanadate, stir until the solution is brownish yellow, transfer the brownish yellow solution to a 100mL autoclave, place it in an oven, 180 °C for 12 hours, and after suction filtration, the sample was dried in an oven at 80 °C for 12 hours, and the precursor (NH 4 ) 5 V 2 o 5 . 1g of precursor (NH 4 ) 5 V 2 o 5 Dissolve in 300mL aqueous solution, add 0.17g lithium hydroxide monohydrate to the solution, then add 0.2g polyvinylpyrrolidone as a dispersant, stir at room temperature for 2 hours, then heat in an oil bath at 80°C until the solvent evaporates to dryness. The obtained samples were calcined at 450 °C in an air atmosphere for 8 h to obtain crystallized LiV 3 o 8 Nanosheets.
[0034] The second step, weigh 0.5g LiV 3 o 8 , dissolved in 50mL of toluene solution, sonicated for 30min at 300w power, LiV 3 o 8 The dispersion of the nanosheets is better, and th...
Embodiment 3
[0036] Step 1: Add 2.28g of oxalic acid to 70mL of aqueous solution dispersed with 2.55g of ammonium metavanadate, stir until the solution is brownish yellow, transfer the brownish yellow solution to a 100mL autoclave, place it in an oven, 180 °C for 12 hours, and after suction filtration, the sample was dried in an oven at 80 °C for 12 hours, and the precursor (NH 4 ) 5 V 2 o 5 . 1g of precursor (NH 4 ) 5 V 2 o 5 Dissolve in 300mL aqueous solution, add 0.17g lithium hydroxide monohydrate to the solution, then add 0.2g polyethylene glycol 4000 as a dispersant, stir at room temperature for 2 hours, then heat in an oil bath at 80°C until the solvent evaporates to dryness. The obtained samples were calcined at 450 °C in an air atmosphere for 8 h to obtain crystallized LiV 3 o 8 Nanosheets.
[0037] The second step, weigh 0.5g LiV 3 o 8 , dissolved in 50mL of toluene solution, sonicated for 30min at 300w power, LiV 3 o 8 The dispersion of the nanosheets is better, an...
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