Cluster-Variation Method for the Triangular Lattice Gas [Part] 1. Three-Sublattice Point Approximation Page: 4 of 24
This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to Digital Library by the UNT Libraries Government Documents Department.
The following text was automatically extracted from the image on this page using optical character recognition software:
A triangular lattice gas model for the problem of ordering
of Li ions in the system Li TiS2 was recently proposed by
Thompson 1 and studied by Berlinsky et al. through a renor-
malization group calculation. In this and the following
paper (hereafter referred to as II) we use Kikuchi's v cluster-
variation method to explore the problem further, including
a discussion of the effects of three-body potentials on
thermodynamic functions and on the order-disorder phase diagram.
Lithium has been intercalated into the layered transition-
metal dichalcogenides (represented by MX2, where M is a
transition metal and X a chalcogen) to form compounds of the
type Li MX2 (0<x<1), that have found use as cathodes in bat-
teries. The system LixTiS2 has been particularly successful
due to its reversibility and rapid lithium self-diffusion.
In LixTiS2, Li ions reside between two TiS2 layers, at
sites which make themselves a two dimensional triangular
network (these are the octahedral sites found between the
two-dimensional triangular layers of sulphur, each S layer
belonging to a different S-Ti-S sandwich). The practical
uses of this material have prompted a large number of exper-
iments including chemical, electrochemical and nuclear
magnetic resonance studies.
Thompson has performed accurate measurements of the
voltage V versus concentration x relationship in the elec-
trochemical cell where Li TiS is produced. The data showed
well defined peaks in the incremental capacity (-3x/3V) at
constant temperature, the main peaks appearing at x=1/9,
Here’s what’s next.
This article can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Article.
Osorio, R. & Falicov, L. M. Cluster-Variation Method for the Triangular Lattice Gas [Part] 1. Three-Sublattice Point Approximation, article, August 1, 1980; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc844495/m1/4/: accessed February 17, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.