一种沥青基钠离子电池负极材料及其制备方法
By pre-oxidizing asphalt-based sodium-ion battery anode materials through gradient pre-oxidation, a three-dimensional cross-linked structure is formed, which solves the problems of adhesion and wall adhesion, significantly improves sodium storage capacity and coulombic efficiency, and is suitable for large-scale production.
CN118289736BActive Publication Date: 2026-07-17SOUTHWEAT UNIV OF SCI & TECH
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SOUTHWEAT UNIV OF SCI & TECH
- Filing Date
- 2024-04-12
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing pitch-based sodium-ion battery anode materials have a low degree of three-dimensional cross-linking oxidation during the pre-oxidation process, which leads to pitch adhesion and wall sticking, resulting in low sodium storage capacity.
Method used
A gradient pre-oxidation method is used to gradually oxidize asphalt within different temperature ranges to form a three-dimensional cross-linked structure, which avoids adhesion and wall sticking and improves sodium storage capacity.
Benefits of technology
It significantly improves the sodium storage capacity and coulombic efficiency of the anode material, solves the problems of adhesion and wall sticking, and is suitable for large-scale production.
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Figure CN118289736B_ABST
Abstract
本发明公开了一种沥青基钠离子电池负极材料及其制备方法，涉及新能源储能器件技术领域。一种沥青基钠离子电池负极材料的制备方法，包括如下步骤：将沥青进行梯度预氧化后，得到梯度预氧化沥青；将梯度预氧化沥青在惰性气氛中进行碳化，得到沥青基钠离子电池负极材料。本发明解决了沥青三维交联氧化程度低、粘连、粘壁和负极材料储钠容量不高问题。
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