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Binder-free, graphitic, hierarchically porous carbon nanofiber (CNF) electrodes with in-situ encapsulated Co–Ni catalysts are synthesized with electrospinning as an efficient oxygen electrode for Li–O2 batteries (LOBs). The inherently interconnected, graphitic network makes it unnecessary to include binders and carbon additives, therefore eliminating the possible side reactions from binder and facilitating...
Impact of humic acid (HA) coating on biochar properties and the associated influence on naphthalene (Naph) sorption were studied. Coating with HA evidently decreased the sorption capacity and isotherm nonlinearity of Naph by the biochars, resulting from their chemical composition and surface property changes. At low solute concentrations, the suppression of HA coating on Naph sorption was primarily...
Silicon oxycarbide (SiOC) ceramic was coated on carbon fibers using a vinyl group-modified silicon alkoxide as the sol precursor. The coatings were characterized by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy and thermogravimetry. The mechanical properties of the carbon fibers were investigated by single fiber tensile tests. Results showed...
Polyacrylonitrile-based carbon fiber bundles, with two sides fixed, were heated in a graphitization furnace with temperature profiles similar to those used in the preparation of carbon/carbon composites. The microstructure of the microvoids formed was characterized by small-angle X-ray scattering and high resolution transmission electron microscopy (HR-TEM). Results showed that the average radius...
A SiC/SiO 2 ceramic coating on carbon fibers was prepared by a sol–gel method followed by heat treatment at high temperature. The structure and the morphology of the SiC/SiO 2 coating were characterized by X-ray photoelectron spectroscopy, X-ray diffraction and scanning electron microscopy. The oxidation resistant properties of the carbon fibers with and without the coating were compared...
Graphene oxide (GO) was employed as the sizing agent for continuous carbon fiber (CF) tows by an electrophoretic deposition and subsequent thermal annealing. The GO sheets were tightly coated and covalently attached to CF surfaces. Such reduced GO-deposited CFs exhibit a significant increase in surface roughness as compared to the bare CFs, which leads to an improvement in the interfacial shear strength...
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