Method for preparing binary doped cathode material lithium vanadium phosphate of lithium ion battery
A technology for lithium-ion batteries and positive electrode materials, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of low conductivity and increase the distance of metal vanadium ions, etc., and achieve the goals of reducing pollution, good cycle performance, and reducing charge transfer resistance Effect
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Embodiment 1
[0019] (1) Take 1.5157 gV 2 o 5 In a beaker, add 30ml of hydrogen peroxide with a concentration of 10% by mass, and stir with a glass rod to form V 2 o 5 ·nH 2 O hydrogel;
[0020] (2) Add 3.2590 g of diammonium hydrogen phosphate, 1.0315 g of lithium hydroxide monohydrate, 0.0528 g of sodium salt, 0.0079 g of fluorine-containing salt and 0.0313 g of high molecular weight PEG35000 to the product obtained in step (1), and oscillate ultrasonically for 5 minutes;
[0021] (3) Use a 5ml pipette to measure 0.625ml of analytically pure low molecular weight PEG200 into a beaker shaken by ultrasonic waves, transfer it to a round bottom flask, and evaporate to dryness on a rotary evaporator at 40°C for 1 hour, then move to vacuum drying Dry in the box at 100°C for 4 hours; take it out, grind it into powder with an agate mortar, put the powder in a porcelain boat, sinter in a vacuum sintering furnace at 700°C under the protection of high-purity argon for 10 hours, and cool naturally...
Embodiment 2
[0025] (1) Take 1.5157 g V 2 o 5 In a beaker, add 30ml of hydrogen peroxide with a concentration of 10% by mass, and stir with a glass rod to form V2 o 5 ·nH 2 O hydrogel;
[0026] (2) Add 3.2590 g of diammonium hydrogen phosphate, 1.0245 g of lithium hydroxide monohydrate, 0.0528 g of sodium salt, 0.0196 g of fluorine-containing salt and 0.0313 g of high molecular weight PEG35000 to the product obtained in step (1), and oscillate ultrasonically for 5 minutes;
[0027] (3) Use a 5ml pipette to measure 0.625ml of analytically pure low molecular weight PEG200 into a beaker shaken by ultrasonic waves, transfer it to a round bottom flask, and evaporate to dryness on a rotary evaporator at 40°C for 1 hour, then move to vacuum drying Dry in the box at 100°C for 4 hours; take it out, grind it into powder with an agate mortar, put the powder in a porcelain boat, sinter in a vacuum sintering furnace at 700°C under the protection of high-purity argon for 10 hours, and cool naturally ...
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