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Erschienen in:
01.08.2010
Effect of Mg doping on the properties of combustion synthesized LiCoO2 powders
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 8/2010
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Abstract
The LiCo1-xMgxO2 (x = 0–0.1) cathode materials for rechargeable lithium ion batteries were synthesized by starch assisted combustion route method. The structural characterization was carried out by X-ray powder diffraction and Laser Raman Spectroscopy. The sample exhibited a well-defined rhombohedral structure and the lattice parameters varied with the increasing magnesium contents. Surface morphology of the synthesized materials was determined by Scanning electron microscope. The cathode materials consist of highly-ordered single crystalline particles with spherical shape. The electrical resistivities of the samples were studied by Hall Effect. Electrical resistivities decrease with increase in magnesium content. Electrochemical properties were characterized by the assembled test cells using Galvanostatic discharge studies that were carried out at a current rate of 0.1 C. Magnesium doped LiCo0.95Mg0.05O2 show improved structural stability, high reversible capacity and excellent electrochemical performance.