Li-rich oxides of different phase compositions xLi2MnO3·(1-x)LiMO2 are synthesized by coprecipitation of mixed transition metal carbonates followed by solid-state reaction with lithium hydroxide. X-ray powder diffraction, scanning electron microscopy, and magnetic studies are used to characterize the pristine structure of the oxides with different compositions. The materials are tested as positive electrode in lithium half-cells. Galvanostatic charge-discharge measurements are performed at different current densities. The lithium-ion diffusion coefficients (DLi+) are estimated from the cyclic voltammetry experiments and found to reach maximum values for composition at x=0.35 having the best electrochemical characteristics.Keywords: Lithium-rich cathodes, electrochemical properties, lithium-ion diffusion, magnetic measurements
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