Petroleum coke microstructure regulation and control and graphite negative electrode material and preparation method thereof

By controlling the microstructure of heavy petroleum feedstock and combining crushing, surface modification and heat treatment processes, high-performance graphite anode materials were prepared, which solved the problem of insufficient microstructure control of petroleum coke in the existing technology and improved the electrochemical performance and production efficiency of lithium batteries.

CN121950340APending Publication Date: 2026-05-01PETROCHINA CO LTD
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Patent Information

Application Number
CN202411540340.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-31
Publication Date
2026-05-01

AI Technical Summary

Technical Problem

Existing technologies have failed to effectively control the microstructure of petroleum coke, resulting in poor performance of artificial graphite anode materials in lithium batteries, especially in terms of specific capacity, cycle life, and fast charging performance.

Method used

By controlling the microstructure of heavy petroleum feedstock, utilizing ultrasonic action and structure modifiers, and combining processes such as pulverization, surface modification, and heat treatment, petroleum coke with a specific microstructure can be prepared, thereby obtaining high-performance graphite anode materials.

Benefits of technology

This technology enables flexible adjustment of the microstructure of petroleum coke, improves the specific capacity, cycle life, and fast-charging performance of artificial graphite anode materials, reduces production costs, and enhances the utilization rate of heavy oil feedstock in refineries and product diversification.

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Abstract

The invention discloses a petroleum coke microstructure regulation and graphite negative electrode material and a preparation method thereof.The preparation method utilizes heavy oil containing polycyclic aromatic hydrocarbon to generate a petroleum coke and graphite negative electrode material, and comprises the steps that after impurities in the heavy oil are removed, a structure regulator is added under the ultrasonic action, and then upper-layer and lower-layer heavy oil is generated; the materials are respectively used as raw materials of petroleum coke and a negative electrode material. According to the method, the low-sulfur and low-nitrogen quality of petroleum coke can be achieved without complex raw material pretreatment, hydrogenation and other processes, the production cost is reduced, the method is easy to apply and popularize in common petrochemical companies, high-added-value utilization of heavy oil of the petroleum and petrochemical companies is achieved, and the method is suitable for industrial production. The high-performance preparation of petroleum coke and the overall improvement of the comprehensive performance of artificial graphite are realized.
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