| 热处理对退役锂离子电池石墨负极材料电化学性能的影响 |
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| 引用本文：高芮芮,张素娜,吴益华,乔永民,戴竞杰,王利军,燕溪溪.热处理对退役锂离子电池石墨负极材料电化学性能的影响[J].上海第二工业大学(中文版),2025,42(1):17-23 |
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| 基金项目:郴州2022 年国家可持续发展议程创新示范区建设省级专项(2022sfq26) 资助 |
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| 中文摘要:通过安全放电方法精细拆解负极片, 柠檬酸超声分离废弃石墨与铜箔, 在空气中对石墨进行热处理去除黏结剂和导电剂等有机杂质, 探讨了不同热处理温度下废弃石墨的形貌、结构和电化学性能。采用X 射线衍射仪(XRD)、扫描电子显微镜(SEM)、电感耦合等离子体(ICP)、全自动比表面积及孔隙度分析仪和锂电池测试系统对废弃石墨提纯样品进行结构表征和电化学性能测试。结果表明: 不同热处理温度对废弃石墨的结构和电化学性能有一定的影响。热处理温度为500 ℃ 时, 废弃石墨负极材料中黏结剂被完全除去, 石墨比表面积为10.3 m2/g, 首次充电容量达到359.65 mAh/g, 相当于商业石墨负极材料的性能, 表现出优异的电化学性能。 |
| 中文关键词:退役锂离子电池 废弃石墨 热处理 电化学性能 |
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| Effect of Thermal Treatment on Electrochemical Performance of Graphite Anodes Recycled fromWaste Lithium-Ion Batteries |
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| Abstract:The anode sheets were meticulously disassembled through a safe discharge method, followed by ultrasonic separation of the waste graphite from the copper foil using citric acid. The graphite was then heat-treated in air to remove binders, conductive agents, and other organic impurities. The morphology, structure and electrochemical performance of the waste graphite at different
heat treatment temperatures were investigated. The characterization of the purified waste graphite samples was conducted using X-ray diffraction (XRD), scanning electron microscopy (SEM), inductively coupled plasma (ICP), the fully automatic specific surface area and pore analyzer and a lithium battery testing system for the assessment of structural properties and electrochemical performance. The results indicate that different heat treatment temperatures significantly affect the structure and electrochemical performance of the waste
graphite. At a heat treatment temperature of 500 ℃, the binders in the waste graphite anode materials are completely removed, resulting in a specific surface area of 10.3 m2/g and an initial charge capacity of 359.65 mAh/g, equivalent to the performance of commercial graphite anode materials, demonstrating excellent electrochemical performance. |
| keywords:waste lithium-ion batteries waste graphite heat treatment electrochemical performance |
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