Composite graphite coated product, graphite composite material and preparation method and application of composite graphite coated product and graphite composite material
A composite graphite and coating technology, which is applied in the direction of active material electrodes, electrical components, electrochemical generators, etc., can solve the problems of poor toughness of the carbon coating layer and many side reactions in the battery cycle, so as to improve high-temperature gas production and inhibit Lithium ion consumption and production cost reduction effect
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Embodiment 1
[0094] (1) Use a roller mill to pulverize Daqing petroleum raw coke until D50 = 9.1 μm, and the vibration is 0.54 g / cm 3 , pre-carbonized at 1050°C for 108h in a tunnel kiln, and then carried out high-temperature graphitization at 3000°C in a box furnace.
[0095] (2) Mix 80 kg of the single-particle artificial graphite A obtained above with 8.8 kg of anthracene oil in a fusion machine for 10 minutes, heat-treat in a horizontal kettle at 610° C. for 12 hours, and obtain the single-particle artificial graphite B.
[0096] (3) Mix 15kg of single-particle artificial graphite B and 1.65kg of anthracene oil in a fusion machine for 10 minutes, and carbonize in a roller kiln at 1400°C for 12 hours to obtain a composite graphite-coated product.
[0097] (4) Take by weighing 1.5kg composite graphite coating product and 300g concentration be the sodium maleate solution (pH=7) of 0.67M and mix evenly, then pour in the fusion machine, adjust the host rotating speed to be 1200r / min, and th...
Embodiment 2
[0100] The difference between this example and Example 1 is that the concentration of sodium maleate in step (2) is 0.33M.
Embodiment 3
[0102] The difference between this example and Example 1 is that the salt solution in step (2) is sodium acrylate, and the solution concentration is 0.67M.
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