ANSTO Publications Online >
Journal Publications >
Journal Articles >

Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/1456

Title: Investigation of cell parameters, microstructures and electrochemical behaviour of LiMn2O4 normal and nano powders.
Authors: Kamarulzaman, N
Yusoff, R
Kamarudin, N
Shaari, NH
Aziz, NAA
Bustam, MA
Blagojevic, N
Elcombe, MM
Blackford, MG
Avdeev, M
Arof, AK
Keywords: Neutron Diffraction
Chemical Reactions
Lithium Oxides
Manganese Oxides
Sol-Gel Process
Grain Size
Issue Date: 1-Mar-2009
Publisher: Elsevier
Citation: Kamarulzaman, N., Yusoff, R., Kamarudin, N., Shaari, N. H., Aziz, N. A. A., Bustam, M. A., et al. (2009). Investigation of cell parameters, microstructures and electrochemical behaviour of LiMn2O4 normal and nano powders. Journal of Power Sources, 188(1), 274-280.
Abstract: Nano materials are usually difficult to prepare. This work presents a simple way of preparing LiMn2O4 nano powders using the high-energy ball milling method. This method has the advantage of producing pure, single-phase and crystalline nano powders. The milling method is carefully controlled to avoid unwanted chemical reactions that may change the stoichiometry of the material. Nano powders of between 30 and 50 nm are obtained. Structural studies of the nano powders, as well as the more-conventional micron-sized LiMn2O4, are made using X-ray diffraction and neutron diffraction methods. Electrochemical evaluation of the materials is undertaken with a three-probe cyclic voltammetry technique and galvanostatic charge-discharge measurements. Structural studies reveal that not only are the crystallites of the nano powders much reduced in size from the normal powders, but their cell parameters are also smaller. The performance characteristics of the nano material show an improvement over that of the micron-sized material by about 17% in the 1st cycle and 70.6% in the 5th cycle, at which the capacity is 132 mAh g(-1). The normal material suffers from severe capacity fading but the nano material shows much improved capacity retention. © 2008, Elsevier Ltd.
URI: http://dx.doi.org/10.1016/j.jpowsour.2008.10.139
http://apo.ansto.gov.au/dspace/handle/10238/1456
ISSN: 0378-7753
Appears in Collections:Journal Articles

Files in This Item:

There are no files associated with this item.

Items in APO are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback