Table of Contents
ISRN Condensed Matter Physics
Volume 2013, Article ID 568191, 8 pages
http://dx.doi.org/10.1155/2013/568191
Research Article

Solid Solutions of () Obtained via a Combustion Synthesis Route and Their Electrochemical Characteristics

1Centre for Nanomaterials Research, Institute of Science, Level 3 Block C, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
2Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
3Institute of Graduate Studies, Universiti Malaya, 50603 Kuala Lumpur, Malaysia

Received 2 December 2012; Accepted 19 December 2012

Academic Editors: S. Bud'ko and R. Rossmanith

Copyright © 2013 Kelimah Elong et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Pure, single-phase and layered materials with good cation ordering are not easy to synthesize. In this work, solid solutions of (x = 0, 0.1, …, 0.9) are synthesized using a self-propagating combustion route and characterized. All the materials are observed to be phase pure giving materials of hexagonal crystal system with R-3m space group. The RIR and R factor values of stoichiometries of (x = 0.1, 0.2, 0.3, 0.4, and 0.5) show good cation ordering. Their electrochemical properties are investigated by a series of charge-discharge cycling in the voltage range of 3.0 to 4.3 V. It is found that some of the stoichiometries exhibit specific capacities comparable or better than those of LiCoO2, but the voltage plateau is slightly more slopping than that for the LiCoO2 reference material.