沥青炭包覆对球形石墨电化学性能的影响  

Effect of Pitch Carbon Coating on Electrochemical Properties of Spherical Graphite

作　　者：刘淮亮 张凌燕 邱杨率 丁大发 尹伟飞 LIU Huailiang;ZHANG Lingyan;QIU Yangshuai;DING Dafa;YIN Weifei(School of Resourcesand Environmental Engineering,Wuhan University of Technology,Key Laboratory of Mineral Resources Processing and Environment,Wuhan 430070,Hubei,China)

机构地区：[1]武汉理工大学资源与环境工程学院,矿物资源加工与环境湖北省重点实验室,湖北武汉430070

出　　处：《矿产综合利用》2024年第1期181-186,共6页Multipurpose Utilization of Mineral Resources

基　　金：十三五国家重点研发计划(2020YFC1909604)。

摘　　要：这是一篇矿物材料领域的论文。通过沥青包覆球形晶质石墨和炭化处理制备出锂离子电池负极材料,系统探究了沥青软化点对沥青炭化包覆球形晶质石墨负极材料结构和电化学性能的影响。结果表明,沥青炭化包覆后在石墨表面形成了一层无定形炭,改善了球形晶质石墨的表面形貌,但未改变其晶体结构;高沥青软化点包覆后的复合材料具有更好的电化学性能和循环稳定性,在温度为280℃条件下,经过30次循环充放电后容量没有明显的衰减,容量保持率为85.07%,比未处理的试样提高了4.74%。This is an article in the field of mineral materials.The effect of pitch softening point on the structure and electrochemical performance of pitch carbonized spherical crystalline graphite anode materials were systematically investigated.The results show that a layer of amorphous carbon is formed on the surface of graphite after carbonization of pitch,which improves the surface morphology of spherical crystalline graphite,but does not change its crystal structure;The composites with high pitch softening point have better electrochemical performance and cycling stability.After 280 cycles of temperature,the capacity of the composites is not significantly reduced after 30 cycles of charge discharge,and the capacity retention rate is 85.07%,which is 4.74%higher than that of the untreated ones.

关 键 词：矿物材料 锂离子电池 沥青 球形晶质石墨 电化学性能 

分 类 号：TD955[矿业工程—选矿]