Structural and electrochemical investigation of LiNi0.8Co0.2-xMxO2 (M = Al, Al plus Mg, Al plus Mg plus Fe) synthesized by solid-state method
Document Type
Article
Publication Date
1-1-2008
Abstract
Lithium nickel cobalt oxide materials doped with Al, Mg, and Fe were synthesized by solid-state reaction at 800 degrees C for 18 h to study the effects of adding transition and nontransition metals to the structure. Crystalline compounds were obtained as revealed by powder X-ray diffraction (XRD). Energy dispersive analysis of X-rays (EDAX) was used to determine the elemental ratio of all the samples. Impedance measurements showed that all samples have decreasing conductivities at higher temperatures and gave negative activation energies. The addition of nontransition metals actually decreased the conductivities of the materials.
Keywords
Cathode materials, Lithium nickel oxide, Lithium nickel cobalt oxide, Secondary lithium cells, Li-ion batteries, Linio2, Lini0.7co0.3o2, Substitution, Behavior
Divisions
CHEMISTRY
Publication Title
Ionics
Volume
14
Issue
6
Publisher
Springer Verlag (Germany)
Additional Information
Department of Chemistry, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA