title: Copper Nanoparticle-Incorporated Carbon Fibers as Free-Standing Anodes for Lithium-Ion Batteries.
abstract: Copper-incorporated carbon fibers (Cu/CF) as free-standing anodes for lithium-ion batteries are prepared by electrospinning technique following with calcination at 600, 700, and 800 °C. The structural properties of materials are characterized by X-ray diffraction (XRD), Raman, thermogravimetry (TGA), scanning electron microscopy (SEM), transmission electron microscope (TEM), and energy dispersive X-ray spectrometry (EDS). It is found that the Cu/CF composites have smooth, regular, and long fibrous morphologies with Cu nanoparticles uniformly dispersed in the carbon fibers. As free-standing anodes, the unique structural Cu/CF composites show stable and high reversible capacities, together with remarkable rate and cycling capabilities in Li-ion batteries. The Cu/CF calcined at 800 °C (Cu/CF-800) has the highest charge/discharge capacities, long-term stable cycling performance, and excellent rate performance; for instance, the Cu/CF-800 anode shows reversible charge/discharge capacities of around 800 mAh g(-1) at a current density of 100 mA g(-1) with stable cycling performance for more than 250 cycles; even when the current density increases to 2 A g(-1), the Cu/CF-800 anode can still deliver a capacity of 300 mAh g(-1). This excellent electrochemical performance is attributed to the special 1D structure of Cu/CF composites, the enhanced electrical conductivity, and more Li(+) active positions by Cu nanoinclusion.
authors.affiliation: School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China.|School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, 200093, China.
authors.forename: Pan
authors.initials: P
authors.lastname: Han
authors.affiliation: School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Yuan
authors.affiliation: School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China.|School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, 200093, China.
authors.forename: Long
authors.initials: L
authors.lastname: Yao
authors.affiliation: School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China.
authors.forename: Zhuo
authors.initials: Z
authors.lastname: Han
authors.affiliation: School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China. jhyang@usst.edu.cn.
authors.forename: Junhe
authors.initials: J
authors.lastname: Yang
authors.affiliation: School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China. syzheng@usst.edu.cn.
authors.forename: Shiyou
authors.initials: S
authors.lastname: Zheng
keywords: Anode; Carbon-fibers; Electrospun; Incorporation; Lithium-ion battery