人造石墨粉制备锂离子电池负极材料的工艺技术研究  

Study on the technology of producing anode materials for lithium-ion batteries with artificial graphite powder

作　　者：吴世锋 徐立宏 刘琳 李彩霞 Wu Shi-feng;Xu Li-hong;Liu Lin;Li Cai-xia(Fangda Carbon New Material Technology Co.Ltd.,Gansu Lanzhou 730084,China)

机构地区：[1]方大炭素新材料科技股份有限公司,甘肃兰州730084

出　　处：《炭素技术》2020年第4期53-56,共4页Carbon Techniques

基　　金：甘肃省科技重大专项(18ZD2FA012)。

摘　　要：为了比较全面地了解以各种人造石墨制品的加工切屑碎为原料制备的锂离子电池负极材料的性能特征,探讨改进其电化学性能的技术方法。本文取5种人造石墨粉制备负极材料,并测试分析其电化学性能。分析认为石墨制品切屑碎均有电化学活性,但因其自身石墨化度、杂质含量以及制粉过程中高强机械研磨导致表面结构缺陷,影响电化学性能。试验结果表明,对接头电极经过清铣表面附着的杂质后的切屑碎整形、球化以及适当的表面改性处理,能够得到与针状焦负极材料性能相近的中高端锂离子电池用负极材料。In order to fully understand the performance of the anode materials for lithium-ion batteries with scrap waste from various artificial graphite(AG)products,and to explore the technology to improve the electrochemical performance,in this paper,several AG powders are used to produce anode materials,and the electrochemical performances are tested and analyzed.The results show that all the scraps of graphite products have electrochemical activity,but it is affected by the graphitization degree,the impurity content and the defects on surface structures caused by high-strength mechanical grinding during pulverizing.The experimental results indicate that after cleaning the impurities attached to the surface,shaping,spheroidizing and appropriate surface modification treatment,the scrap waste from the graphite electrode nipple can be used to produce high-quality anode materials for lithium-ion batteries,whose properties are similar with needle coke anode materials.

关 键 词：石墨粉 表面改性 负极材料 

分 类 号：TM242[一般工业技术—材料科学与工程]