A co-production process of mesophase carbon microspheres and negative electrode material coke

Abstract

The invention provides a co-production process method of mesophase carbon microspheres and negative electrode material coke. High-temperature coal tar pitch and medium-low temperature coal tar pitch are mixed to produce mesophase carbon microspheres, and the remaining pitch produced from mesophase carbon microspheres is used as The raw materials of negative electrode coke include polymerization reaction, separation and drying of polymerization products, coking and drying of residual pitch, and co-production to obtain two negative electrode materials for lithium-ion batteries, mesophase carbon microspheres and negative electrode material coke. Realized the use of high-temperature coal tar pitch and medium-low temperature coal tar pitch to co-produce mesophase carbon microspheres and negative electrode material coke, so that coal tar pitch can be fully utilized, and two kinds of negative electrodes for lithium-ion batteries with high added value can be obtained materials, and the cost of raw materials is low, the process is simple, no waste discharge, product quality is good, and corporate profits are high.

Description

technical field [0001] The invention relates to the technical field of negative electrode material production, in particular to a co-production process of mesophase carbon microspheres and negative electrode material coke. Background technique [0002] Lithium-ion batteries have been widely used in 3C electronic products, power tools, medical electronics, energy storage equipment and other fields due to their significant advantages such as high energy density, high working voltage, long cycle life, small self-discharge, no memory effect and environmental friendliness , It has gradually been promoted in pure electric vehicles, hybrid vehicles, rail transit, aerospace and other transportation fields. At present, China has become the world's largest lithium-ion battery manufacturing base and the second largest lithium-ion battery producer and exporter, and the lithium-ion battery market is entering a golden period. [0003] In lithium-ion batteries, the negative electrode mate...

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Problems solved by technology

However, carbon materials such as needle coke, petroleum coke, and metallurgical coke are mainly suitable for graphite electrodes, recarburizers, iron and steel smelting and other fields, and are not specially developed and produced for negative electrode materials. They have certain defects in the application of lithium-ion batteries and cannot Meet the higher requirements for negative electrode materials in the development of lithium-ion batteries in the future

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