Spherical graphitic corpuscule composite carbon material and preparation thereof
A technology of spherical graphite and composite carbon, which is applied in the field of composite carbon materials to achieve the effects of high charge and discharge efficiency, high stacking density, and simple preparation process
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[0026] A kind of preparation method of spherical graphite particle composite carbon material of the present invention comprises the following steps:
[0027] 1. Adopt a pulverizer-PCS system composed of a fine-toothed stator and a modular crushing disc, add natural graphite into the pulverizer, and use a speed of 400-800rpm to make graphite particles collide, curl, Surface treatment such as kneading, compacting, agglomeration, and coating takes 30-60 minutes, and the processing is repeated for more than two times. The rhombohedral crystal structure of natural graphite is increased from about 20% to more than 80%, and spherical graphite is obtained.
[0028] 2. Purifying the obtained spherical graphite, washing the purified graphite until the pH value is neutral, dehydrating and drying.
[0029] 3. Mix and coat the above-mentioned treated graphite particles with non-ferrous metals to form coated graphite, and then perform graphitization treatment to obtain a composite carbon ma...
Embodiment 1
[0037]Use near-nuclear pure graphite as raw material, with a particle size of 100 mesh and a carbon content of 99.99%. It is added to the pulverizer-PCS system composed of a stator with a fine-tooth structure and a module-shaped pulverizing disc, and the graphite is crushed at a speed of 800rpm. The particles are subjected to surface treatment such as collision, curling, rubbing, compacting, agglomeration, and coating. The time is 60 minutes, and the processing is repeated 4 times. The rhombohedral crystal structure of natural graphite is increased from about 20% to 85%, and a spherical shape is obtained. graphite. Purify the obtained spherical graphite (the purification treatment method follows the method of night phase method ZL: 200410010264.1 or ultra-high purity purification method ZL: 200610127388.7), and wash the purified graphite until the pH value is neutral, dehydrate and dry . Add the above treated graphite particles to AgNO with a concentration of 1M 3 Immerse in...
Embodiment 2
[0039] Use near-nuclear pure graphite as raw material, with a particle size of 200 mesh and a carbon content of 99.99%. It is added to the pulverizer-PCS system composed of a stator with a fine-tooth structure and a module-shaped pulverizing disc, and the graphite is crushed at a speed of 600rpm. The particles are subjected to surface treatment such as collision, curling, rubbing, compacting, agglomeration, and coating. The time is 30 minutes, and the processing is repeated 6 times. The rhombohedral crystal structure of natural graphite is increased from about 20% to 90%, and a spherical shape is obtained. graphite. Purifying the obtained spherical graphite, washing the purified graphite until the pH value is neutral, dehydrating and drying. Mix and coat the above-mentioned treated graphite particles with non-ferrous metals, that is, add the treated graphite particles to AgNO with a concentration of 1M 3 Immerse in the solution for 24 hours at a temperature of 100°C, the soli...
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