Abstract
We are reporting the synthesis and characterization of solid solutions of the LiNiO2 and LiCoO2 system. Substitution of cobalt for nickel in the LiNi1−yCoyO2 phases provides significant improvements in the two-dimensionality of the crystal lattice and ease the large scale synthesis. This structural effect improves the reversibility of the lithium intercalation-deintercalation process. We have evaluated the vibrational spectra and electrochemical properties of LiNi0.7Co0.3O2 (charge-discharge profiles and cyclic voltammetry) and compared the results with those of the end members, i.e., LiNiO2 and LiCoO2. The local environment of cations against oxygen neighboring atoms has been determined.
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Rougier, A., Nazri, G.A. & Julien, C. Vibrational spectroscopy and electrochemical properties of LiNi0.7Co0.3O2 cathode material for rechargeable lithium batteries. Ionics 3, 170–176 (1997). https://doi.org/10.1007/BF02375613
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DOI: https://doi.org/10.1007/BF02375613