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High-rate lithium ion battery artificial graphite negative electrode material and preparation method thereof
The invention relates to the field of lithium ion battery negative electrode materials, in particular to a preparation method of an artificial graphite negative electrode material of a high-rate lithium ion battery. The graphite negative electrode material with a special structure is prepared through the steps of crushing, surface treatment, oxidation modification, granulation, graphitization, coating, demagnetization, screening and the like. The material has the advantages of simple process, no burr on the particle surface, smooth and flat surface and the like, and can ensure higher energy density and good processability while greatly improving the quick charging performance; besides, the artificial graphite negative electrode prepared by the method has the characteristics of high reversible capacity, excellent rate capability and good cycle performance. The preparation method disclosed by the invention is simple and feasible, wide in raw material source and easy to industrialize.
本发明涉及锂离子电池负极材料领域，特别是涉及一种高倍率锂离子电池人造石墨负极材料的制备方法，该制备方法采用易石墨化焦为原料，通过粉碎、表面处理、氧化修饰、造粒、石墨化、包覆、除磁筛分等步骤制得了具有特殊结构的石墨负极材料，具有工艺简单、颗粒表面无毛刺、表面光滑平整等优点，在大幅提高快充性能的同时也可以保证较高的能量密度和良好的加工性能；利用该法制备出的人造石墨负极具有可逆容量高、倍率性能优异和循环性能好的特点。本发明的制备方法简便易行，原料来源广泛，易于产业化。
High-rate lithium ion battery artificial graphite negative electrode material and preparation method thereof
The invention relates to the field of lithium ion battery negative electrode materials, in particular to a preparation method of an artificial graphite negative electrode material of a high-rate lithium ion battery. The graphite negative electrode material with a special structure is prepared through the steps of crushing, surface treatment, oxidation modification, granulation, graphitization, coating, demagnetization, screening and the like. The material has the advantages of simple process, no burr on the particle surface, smooth and flat surface and the like, and can ensure higher energy density and good processability while greatly improving the quick charging performance; besides, the artificial graphite negative electrode prepared by the method has the characteristics of high reversible capacity, excellent rate capability and good cycle performance. The preparation method disclosed by the invention is simple and feasible, wide in raw material source and easy to industrialize.
本发明涉及锂离子电池负极材料领域，特别是涉及一种高倍率锂离子电池人造石墨负极材料的制备方法，该制备方法采用易石墨化焦为原料，通过粉碎、表面处理、氧化修饰、造粒、石墨化、包覆、除磁筛分等步骤制得了具有特殊结构的石墨负极材料，具有工艺简单、颗粒表面无毛刺、表面光滑平整等优点，在大幅提高快充性能的同时也可以保证较高的能量密度和良好的加工性能；利用该法制备出的人造石墨负极具有可逆容量高、倍率性能优异和循环性能好的特点。本发明的制备方法简便易行，原料来源广泛，易于产业化。
High-rate lithium ion battery artificial graphite negative electrode material and preparation method thereof
一种高倍率锂离子电池人造石墨负极材料及其制备方法
GE CHUANCHANG (Autor:in) / YANG YONGJUN (Autor:in)
30.03.2021
Patent
Elektronische Ressource
Chinesisch
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