Effect of oxidative stabilization on the electrochemical performance of carbon mesophases as electrode materials for lithium batteries |
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Authors: | A Concheso R Santamaría R Menéndez J M Jiménez-Mateos R Alcántara P Lavela J L Tirado |
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Institution: | (1) Instituto Nacional del Carbón, CSIC, Apartado 73, 33080 Oviedo, Spain;(2) REPSOL YPF. Ctra. N-V km 18, 28930 Madrid, Spain;(3) Laboratorio de Química Inorgánica, Universidad de Córdoba, Campus de Rabanales, 14071 Cordoba, Spain |
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Abstract: | The effect of oxidative stabilization as a mean to modify the carbon texture was essayed in a group of mesophases previous to carbonization at 900 °C with the aim of evaluating the influence on electrochemical performance when used as electrode materials in lithium test cells. X-ray diffraction, optical microscopy and chemical analysis, Fourier-transform infrared spectroscopy have been used to describe the compositional and textural properties of the as-produced parent mesophases, the samples were further treated under air current to stabilize their microstructures and the corresponding carbonized samples at 900 °C. The electrochemical performance was determined by the galvanostatic method and further correlated to the physical–chemical properties and interface resistance of the materials. In all cases, the stabilization process has demonstrated a beneficial effect on the capacity retention in the measured range. |
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