High-rate lithium ion battery graphite cathode material and preparation method thereof
The invention belongs to the field of lithium ion batteries, and particularly relates to a high-rate lithium ion battery graphite cathode material and a preparation method thereof. The preparation method comprises the following steps: (1) pulverization and shaping of raw materials; (2) graphitizatio...
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| creator | CHEN WEI FU JIAN MEI HAILONG LENG JIUGOU LONG WEI ZENG DONGQING DAI TAO |
| description | The invention belongs to the field of lithium ion batteries, and particularly relates to a high-rate lithium ion battery graphite cathode material and a preparation method thereof. The preparation method comprises the following steps: (1) pulverization and shaping of raw materials; (2) graphitization; (3) demagnetization screening; (4) liquid phase coating granulation; (5) surface oxidation treatment. According to the high-rate lithium ion battery graphite cathode material and the preparation method thereof, a liquid phase coating granulation process replaces traditional secondary granulationthrough optimized fine graphite, so as to realize uniform coating of the surface of graphite, reduce the anisotropism of the graphite and shorten the diffusion path of lithium ions; then a micro porestructure is formed on the surface of the graphite through a surface oxidization pore formation process, so that a lithium ion migration channel of a cardinal plane is added to increase the migrationspeed of lithium ions. The |
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The preparation method comprises the following steps: (1) pulverization and shaping of raw materials; (2) graphitization; (3) demagnetization screening; (4) liquid phase coating granulation; (5) surface oxidation treatment. According to the high-rate lithium ion battery graphite cathode material and the preparation method thereof, a liquid phase coating granulation process replaces traditional secondary granulationthrough optimized fine graphite, so as to realize uniform coating of the surface of graphite, reduce the anisotropism of the graphite and shorten the diffusion path of lithium ions; then a micro porestructure is formed on the surface of the graphite through a surface oxidization pore formation process, so that a lithium ion migration channel of a cardinal plane is added to increase the migrationspeed of lithium ions. 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| subjects | BASIC ELECTRIC ELEMENTS CAPACITORS CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE CHEMISTRY COMPOUNDS THEREOF ELECTRICITY INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY |
| title | High-rate lithium ion battery graphite cathode material and preparation method thereof |
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