A Simple Pyrolysis Route To Synthesize Carbon Nanofibers in Molten Zinc Chloride as an Anode Material for Li Ion Batteries

Abstract

In this study, carbon nanofibers (CNFs) have been synthesized by a simple pyrolysis of tetrahydrofuran using molten zinc chloride as a liquid environment at 600 °C for 10 h. Scanning electron microscope images reveal that the obtained CNFs have diameters of about 50 nm and lengths up to tens of micrometers. As an anode material for Li ion batteries, the obtained CNFs can deliver a reversible capacity of 310 mA h/g after 200 cycles at a current density of 100 mA/ g. When tetrahydrofuran is substituted by other carbon sources (ferrocene or lactic acid), CNFs can also be synthesized through this similar process; therefore, the pyrolysis method is a general way to prepare CNFs in molten zinc chloride.

One step transformation of waste polyvinyl chloride to tantalum carbide@carbon nanocomposite at low temperature

“…When the reaction temperature is below 650°C, TaC cannot be obtained from the reaction (1). 34 The diffusion coefficient of carbon is relatively low at low reaction temperature (700°C), the newly formed carbon can accumulate on the surface of TaC x to form TaC x @C. Meantime, the carbon (the outer shell) prevents the crystal growth of TaC. The XRD patterns show similar results, which evidences that the as-obtained products are TaCs with wellcrystalline.…”

“…It is known that the diffusion coefficient of carbon is correlated with the reaction temperature. 34 The diffusion coefficient of carbon is relatively low at low reaction temperature (700°C), the newly formed carbon can accumulate on the surface of TaC x to form TaC x @C. Meantime, the carbon (the outer shell) prevents the crystal growth of TaC. At the higher reaction temperature, the carbon atoms with higher diffusion coefficient are beneficial to TaC x formation with a high value of x and also facilitate the crystal growth of TaC.…”

Edge-Plane Exposed N-Doped Carbon Nanofibers Toward Fast K-Ion Adsorption/Diffusion Kinetics for K-Ion Capacitors

“…180°C) additive plays an important role in the formation of N-doped carbon nanofibers. In the 47 The evolved FeO acts as the catalyst to promote pyrolysis of ferrocene and catalyze the formation of carbon nanofibers. The derived NH 3 acts as a N source to generate the N-doped defects in CFs.…”

Solvothermal synthesis of a silicon hierarchical structure composed of 20 nm Si nanoparticles coated with carbon for high performance Li-ion battery anodes

“…The D-band and G-band are assigned to the vibration of carbon atoms with dangling bond in-plane terminations of disordered graphite and vibration of sp 2 -bonded carbon atoms in a 2D hexagonal lattice, respectively. 25 The morphology of the prepared Si-20 and Si-20@C were evaluated by scanning electron microscope (SEM) and transmission electron microscopy (TEM). Fig.…”