改性石墨的制备方法、二次电池、电池模块、电池包和用电装置
By subjecting coal-based needle coke to closed-loop heat treatment, modified graphite is prepared to form a coating layer on its surface, thus solving the side reaction problem between graphite anode material and electrolyte and improving the initial coulombic efficiency and cycle performance of lithium-ion secondary batteries.
CN116648428BActive Publication Date: 2026-07-17CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
- Filing Date
- 2021-08-31
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing graphite anode materials are prone to side reactions with the electrolyte in lithium-ion secondary batteries, leading to the loss of active lithium ions and reducing cycle performance and service life.
Method used
Using coal-based needle coke as raw material, volatiles are released and enriched on the surface to form a coating layer through closed heat treatment, thus preparing modified graphite, reducing surface roughness and repairing surface defects, and used as a negative electrode material.
Benefits of technology
It improves the initial coulombic efficiency and cycle performance of lithium-ion secondary batteries, and extends their service life.
✦ Generated by Eureka AI based on patent content.
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Figure CN116648428B_ABST
Abstract
本申请提供了改性石墨的制备方法、二次电池、电池模块、电池包和用电装置。所述改性石墨的制备方法，其特征在于，包括以下步骤：破碎步骤：将煤系针状焦破碎，得到物料A；整形步骤：将物料A进行整形并去细粉，得到物料B；热处理步骤：将物料B置于反应釜中进行热处理后，冷却至室温，得到物料C；石墨化步骤：将物料C置于石墨炉中进行石墨化后，冷却至室温，所得产物即为改性石墨。
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