Table of Contents Author Guidelines Submit a Manuscript
Journal of Nanomaterials
Volume 2015, Article ID 613124, 6 pages
http://dx.doi.org/10.1155/2015/613124
Research Article

Palladium-Gold Nanoalloy Surface Modified LiMn2O4 Cathode for Enhanced Li-Ion Battery

SensorLab, Department of Chemistry, University of Western Cape, Private Bag X17, Bellville, Cape Town 7535, South Africa

Received 13 January 2015; Accepted 6 April 2015

Academic Editor: Wei Chen

Copyright © 2015 Natasha Ross 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

Au with Pd nanoparticles were synthesized and coated onto the spinel LiMn2O4 via a coprecipitation calcination method with the objective to improve the microstructure, conductivity, and electrochemical activities of pristine LiMn2O4. The novel composite cathode had high phase purity, well crystallized particles, and more regular morphological structures with narrow size distributions. At enlarged cycling potential ranges the sample delivered 90 mAh g−1 discharge capacity compared to LiMn2O4 (45 mAh g−1). It was concluded that even a small amount of the Pd and Au enhanced both the lithium diffusivity and electrochemical conductivity of the host sample due to the beneficial properties of their synergy.