钠离子电池及其竹质硬炭负极活性材料的制备
By combining pre-carbonization, modulation, and carbonization treatments with suspension treatment in a carbon dioxide and organic atmosphere, the problems of unsatisfactory capacity and high self-discharge rate of bamboo hard carbon anode materials at low temperatures were solved, resulting in better battery performance and stability.
CN118495507BActive Publication Date: 2026-07-17CENT SOUTH UNIV
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CENT SOUTH UNIV
- Filing Date
- 2024-05-17
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing bamboo-based hard carbon anode active materials have unsatisfactory capacity, poor self-discharge rate, and unreliable batch stability when prepared at low temperatures.
Method used
Bamboo-based hard carbon anode active material is prepared by pre-carbonization, modulation and carbonization treatment, followed by suspension and heat preservation in a carbon dioxide atmosphere, and then suspension and heat preservation treatment in an atmosphere containing specific organic matter.
Benefits of technology
Achieving excellent capacity at lower temperatures reduces self-discharge rate and improves batch stability.
✦ Generated by Eureka AI based on patent content.
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Figure CN118495507B_ABST
Abstract
本发明属于钠离子电池负极材料领域，具体涉及一种竹质硬炭负极活性材料的制备方法，将竹原料进行预炭化，得到预炭料，将预炭料和调制剂混合调制后进行炭化，得到炭料；将炭料预先悬浮在含二氧化碳的气氛A中，并在温度T1下进行第一段保温处理，得到一段改性料，随后再将一段改性料悬浮在含有成分A的气氛B中并在温度T2下进行第二段保温处理，制得所述的竹质硬炭负极活性材料。本发明还包括所述的制备方法制得的材料及其在钠离子电池中的应用。本发明可以在较低的温度下还可以获得更优的容量，不仅如此，还能够有效规避材料的自放电风险，改善批次稳定性。
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