Preparation system and preparation method of silicon-oxygen negative electrode material of lithium ion battery

By designing bidirectional conveying components and gas guiding assemblies, the problems of carrier particle cracking and uneven reaction in the preparation of silicon-oxygen anode materials for lithium batteries were solved, achieving full reaction of carrier particles and high battery life of lithium batteries.

CN121539958AActive Publication Date: 2026-02-17INNER MONGOLIA JINCHENG GREEN ENERGY GRAPHITE NEW MATERIALS CO LTD
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Patent Information

Application Number
CN202610049196.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-15
Publication Date
2026-02-17
Estimated Expiration
2046-01-15

AI Technical Summary

Technical Problem

In existing methods for preparing silicon-oxygen anode materials for lithium batteries, microcracks appear in the carrier particles in the high-temperature region, leading to a decrease in the battery's endurance and uneven distribution of reactant gases, which affects battery performance.

Method used

The design employs bidirectional conveying components and gas guiding assemblies, utilizing the different directions of the spiral blades to transport carrier particles. Through inert gas preheating and zoned control of high-temperature reaction gases, it ensures that the carrier particles are in full contact with the reaction gases in the high-temperature zone, while avoiding cracks caused by temperature differences.

Benefits of technology

This improves the integrity of the carrier particles and the uniformity of the reaction in the silicon-oxygen anode material of lithium batteries, thereby enhancing the battery life and production efficiency.

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Abstract

The invention relates to the technical field of lithium battery material production, in particular to a lithium ion battery silicon-oxygen negative electrode material preparation system and method.The lithium ion battery silicon-oxygen negative electrode material preparation system comprises a transversely-arranged furnace body, the furnace body is internally provided with a preheating area and a high-temperature area, and the lithium ion battery silicon-oxygen negative electrode material preparation system further comprises a two-way conveying part, a driving assembly and a gas guide assembly; the driving assembly is arranged on the furnace body and connected with the two-way conveying piece. Through the arrangement of the two-way conveying part, the driving assembly and the air guide assembly, carrier particles can be preheated before entering a high-temperature area, and the situation that tiny cracks are generated due to the fact that thermal stress on the surfaces of the carrier particles is too large due to sudden temperature difference when the carrier particles enter the high-temperature area is avoided; and meanwhile, the carrier particles can be continuously subjected to'climbing-sliding-re-climbing 'movement in the rotating process of the two-way conveying part, so that full contact between the carrier particles and the reaction gas is ensured, and dual guarantee on the endurance performance of the lithium battery is realized.
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Citation Information

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  • Preparation process of silicon-based negative electrode material for lithium ion battery

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  • Continuous purification device and use method thereof

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