Preparation and lithium-ion storage property of coal tar pitch-based carbon dots composite nanofibers
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.
coal tar pitch-based carbon dotsnanofiberselectrospinninganode materialelectrochemical propertyspecific capacity
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