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Autori: Popovici I C, S. Birghila, G. Voicu, V. Ionescu, V. Ciupina, G. Prodan
Editorial: Journal of Optoelectronics and Advanced Materials, 12(9), p.1903-1908, 2010.
We report here experimental studies performed on petroleum cokes to be used as anode materials for Li-ion secondary batteries. Our study is also relevant for other uses of petroleum coke include making carbon anodes for the aluminum industry, graphite electrodes for arc furnaces, polycarbonate plastics, steel, carbon refractory bricks for blast furnaces, packing media for anode baking furnaces. Three calcinated petroleum cokes were chosen to perform this study focused on the structural and morphological characterization by X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques, including energy dispersive X-ray (EDAX) analysis and high-resolution electron microscopy (HRTEM). X-ray diffraction study reveal interlayer spacing and microcrystalline parameters of petroleum cokes. The SEM – EDAX analysis of petroleum cokes confirmed the presence of large particles „chained” together forming agglomerates. The SAED and HRTEM analysis reveal that lattice fringe which can be ascribed to 2.85 nm diffraction plane of graphite. Also intercalated amorphous layers generate distortions crystals were observed.
Cuvinte cheie: petroleum coke, XRD, microstructure, SEM, TEM