煤沥青基碳点复合纳米纤维的制备及其储锂性能  

Preparation and lithium-ion storage property of coal tar pitch-based carbon dots composite nanofibers

作　　者：赵海鹏 赫瑞元 张伟 尚阳 Zhao Haipeng;He Ruiyuan;Zhang Wei;Shang Yang(Shanxi Huayang Carbon Material Technology Co.,Ltd.,Datong Shanxi 037003,China)

机构地区：[1]山西华阳碳材科技有限公司,山西大同037003

出　　处：《煤化工》2024年第4期97-99,共3页Coal Chemical Industry

摘　　要：以自制煤沥青基碳点为前驱体,聚丙烯腈为纺丝载体,采用静电纺丝法制备煤沥青基碳点复合纳米纤维(CNF@CDs)。通过SEM、XRD、Raman等对材料的结构和组成进行表征,采用恒流充放电测试手段对材料的电化学性能进行评估。结果表明:煤沥青基碳点添加量是影响CNF@CDs形貌、层间距及缺陷程度等微观结构的重要因素。采用CNF@CDs作为锂离子电池负极材料,当电流密度为100 mA/g时,CNF@CDs-2的首次放电比容量为827 mA·h/g;当电流密度为1000 mA/g时,其平均可逆比容量为104 mA·h/g,表现出优异的电化学性能。The coal tar pitch-based carbon dots composite nanofibers(CNF@CDs)were prepared by the electrospinning technology using homemade coal tar pitch-based carbon dots as precursors and polyacrylonitrile(PAN)as spinning carrier.The material structure and composition were characterized by SEM,XRD,Raman,etc.,and the electrochemical properties of the material were evaluated by the galvanostatic charge/discharge(GCD)measurement.The results showed that the addition volume of CDs was an important factor affecting the microstructure of CNF@CDs in terms of morphology,layer spacing and defect degree.When CNF@CDs was used as an anode material for lithium-ion batteries,the first discharge specific capacity of CNF@CDs-2 anode was as high as 827 mA·h/g at a current density of 100 mA/g;and its average reversible specific capacity was 104 mA·h/g at a current density of 1000 mA/g,which showed excellent electrochemical performance.

关 键 词：煤沥青基碳点 纳米纤维 静电纺丝 负极材料 电化学性能 比容量 

分 类 号：TM242[一般工业技术—材料科学与工程]