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
赵海鹏 1赫瑞元 1张伟 1尚阳1
作者信息
- 1. 山西华阳碳材科技有限公司,山西 大同 037003
- 折叠
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 1 000 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.
Abstract
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 1 000 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Key words
coal tar pitch-based carbon dots/nanofibers/electrospinning/anode material/electrochemical property/specific capacity引用本文复制引用
出版年
2024
NETL
NSTL
万方数据