Preparation method of high-compaction and high-capacity composite cathode material for lithium battery
A positive electrode material and high-capacity technology, which is applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as difficulty, reduction of LiFePO4 tap density, and complex particle size and shape control process, and achieve low equipment requirements and distribution The effect of regularity and excellent electrical properties
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Embodiment 1
[0042] (1) Add 1g of graphene oxide and 500g of deionized water into the reactor, form a suspension after ultrasonic dispersion for 60 minutes, then add 2.5g of cerium acetate, 0.625g of potassium acetate and 0.75g of urea, and continue ultrasonication for 0.5 hours Finally, add ammonia water to the reactor to adjust the pH value to 8.0, and continue ultrasonication for 1 hour, then seal the reactor, and place it in an oven at 200°C for 30 hours, and finally cool to room temperature in turn, rinse with deionized water Wash twice, dry and microwave at full power for 60 seconds in a microwave oven to obtain a cerium oxide / graphene composite;
[0043] (2), 1.0g cerium oxide / graphene composite, 15g lithium iron phosphate, 0.0375g titanium dioxide (TiO 2 ) were sequentially added to the container with ethanol, ultrasonically dispersed for 1 hour, and then in N 2 Ball milling under protection for 6 hours, and finally the ball milled material was dried at 80°C for 15 hours, and then...
Embodiment 2
[0047] (1) Add 1g graphene oxide and 800g deionized water into the reactor, form a suspension after ultrasonic dispersion for 90 minutes, then add 3.0g cerium acetate, 0.75g potassium acetate and 0.75g urea, and continue ultrasonication for 1 hour Finally, add ammonia water to the reactor to adjust the pH value to 8.5, and then continue to sonicate for 1.5 hours, then seal the reactor, and place it in an oven at 300°C for 35 hours, and finally cool it to room temperature in sequence, and wash it with deionized water Wash twice, dry and put into a microwave oven at full power for 80 seconds to obtain a cerium oxide / graphene composite;
[0048] (2), 2.0g cerium oxide / graphene composite, 40g lithium iron phosphate, 0.05g titanium dioxide (TiO 2 ) were sequentially added to the container with ethanol, ultrasonically dispersed for 1.5 hours, and then in N 2 Ball milling under protection for 10 hours, and finally the ball milled material was dried at 80°C for 15 hours, and then coo...
Embodiment 3
[0052] (1) Add 1g graphene oxide and 1000g deionized water into the reactor, form a suspension after ultrasonic dispersion for 100 minutes, then add 5.0g cerium acetate, 1.25g potassium acetate and 0.75g urea, and continue ultrasonication for 1 hour Finally, add ammonia water to the reactor to adjust the pH value to 9.0, and then continue ultrasonication for 2 hours, then seal the reactor, and place it in an oven at 300°C for 36 hours, and finally cool it to room temperature and wash with deionized water Washing 3 times, drying and microwave treatment at full power for 90 seconds in a microwave oven to obtain a cerium oxide / graphene composite;
[0053] (2), 2.0g cerium oxide / graphene composite, 50g lithium iron phosphate, 0.075g titanium dioxide (TiO 2 ) were sequentially added to the container with ethanol, ultrasonically dispersed for 3 hours, and then in N 2 Ball milling under protection for 10 hours, and finally the ball milled material was dried at 90°C for 20 hours, and...
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