Press molding technology for petroleum coke

Abstract

The invention discloses a press molding technology for petroleum coke. The technology comprises steps as follows: air-drying, drying, grinding, preheating, stirring, prepressing and pressure maintaining. According to the technology, the petroleum coke is subjected to grinding and extrusion molding, the purpose of secondary granulation of an anode material is achieved, more holes and channels can be formed in the anode material after secondary granulation, embedding-disembedding of lithium in the anode material is facilitated; meanwhile, after the petroleum coke is subjected to grinding and press molding, a molded sheet product can be directly placed in a graphitizing furnace for graphitizing treatment, so that a crucible used in the production process of anode powder can be omitted, then production cost is saved, degree of graphitization of the petroleum coke can be remarkably increased and is increased to 93 or higher from 90, quality of the anode material is improved, and electric capacity of the product is improved. The morphology of the anode material obtained after grinding and press molding is better than an anode material without being subjected to grinding and press molding, and the high-end demand of the market for the anode material is met.

Description

technical field [0001] The invention relates to the technical field of graphitization technology, in particular to a petroleum coke pressing technology. Background technique [0002] Compared with the original batteries, lithium-ion batteries have been rapidly popularized in mobile phones and notebook computers due to their high energy density, long cycle life, and no memory effect. With the increasing requirements of various products for small, lightweight, multi-functional, and long-term driving, the capacity requirements for lithium-ion batteries are also increasing. At present, the improvement of lithium-ion battery capacity mainly depends on the development and improvement of negative electrode materials. . Therefore, for a long time, improving the specific capacity of lithium-ion battery anode materials, reducing the first irreversible capacity, and improving the rate characteristics have always been the focus of research and development. At present, there are many s...

AI Technical Summary

Problems solved by technology

[0004] Crucibles are often used in the production process of negative electrode materials, and the production cost is relatively high. At the same time, in order to improve the quality of negative electrode materials, secondary granulation is often required. At present, the methods of secondary granulation are mostly chemical methods or methods of adding auxiliary materials. , the process is more complicated, the production cost is higher, and it is not easy to realize