Abstract
In this paper, we report the synthesis, the physical properties and the electrochemical features of the lithium nickel-cobalt oxide cathode materials prepared by a combustion method at moderate temperature. Structural properties were investigated by X-ray diffraction, Raman scattering and FTIR. Spectroscopic measurements show unambiguously that the final product is identified as a modified-spinel structure (Fd3m space group) with the stoichiometric formula Li2[Ni0.5Co0.5]2O2. Electrochemical cells Li//Li2[Ni0.5Co0.5]2O2 were fabricated using an organic electrolyte and their performances were tested. For a modified-spinel Li2[Ni0.5Co0.5]2O4 structure the chemical diffusion coefficient of Li ions is around 10−10 cm2s, which is lower than for a layered LiNi0.5Co0.5O4 host matrix.
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El-Farh, L., Massot, M., Lemal, M. et al. Physical Properties and Electrochemical Features of Lithium Nickel-Cobalt Oxide Cathode Materials Prepared at Moderate Temperature. Journal of Electroceramics 3, 425–432 (1999). https://doi.org/10.1023/A:1009930317366
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DOI: https://doi.org/10.1023/A:1009930317366