Improved Electrochemical Investigation of Combustion Synthesized Cd-doped LiCoO<sub>2</sub> Powders
Keywords:LiCo1-xCdxO2, Structural studies, Surface morphology, Conductivity, Discharge capacity.
The LiCo1-xCdxO2 (x = 0 to 0.1) cathode materials were synthesized by the combustion method (annealed at 800 °C for 12 h). Structural analyses of the synthesized materials were carried out using XRD. All the samples had the R-3m structure. LiCo0.90Cd0.1O2 sample contained CdO phase as an impurity. Fourier transform infrared (FTIR) studies were carried out to understand the nature of the metal-ligand bond. The surface morphology and particle agglomeration was investigated using scanning electron microscope. The room temperature electrical conductivities of the sample increased with Cd content. For LiCo1-xCdxO2 (x = 0, 0.01, 0.03, 0.05 and 0.1), the first discharge capacity increased with increase in Cd content. Among these samples, LiCo0.95Cd0.05O2 had good cycling performance (discharge capacity 195 mAh g-1 at n = 30).
Keywords: LiCo1-xCdxO2; Structural studies; Surface morphology; Conductivity; Discharge capacity.
© 2010 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.
DOI: 10.3329/jsr.v2i3.3877 J. Sci. Res. 2 (3), 443-452 (2010)
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