Effect of Mn source and peculiar cycle characterization for LiAl0.1Mn1.9O4material in the 3 V region

Authors
Citation
Ys. Lee et M. Yoshio, Effect of Mn source and peculiar cycle characterization for LiAl0.1Mn1.9O4material in the 3 V region, EL SOLID ST, 4(10), 2001, pp. A155-A158
Citations number
13
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
ELECTROCHEMICAL AND SOLID STATE LETTERS
ISSN journal
1099-0062 → ACNP
Volume
4
Issue
10
Year of publication
2001
Pages
A155 - A158
Database
ISI
SICI code
1099-0062(200110)4:10<A155:EOMSAP>2.0.ZU;2-4
Abstract
LiAl0.1Mn1.9O4 was synthesized using LiOH, Al(NO3)(3), and two different Mn 3O4 sources (Tosoh and Chuodenki, Japan). Rietveld analysis revealed that t he two Mn3O4 and LiAl0.1Mn1.9O4 compounds exhibited the same structures, re spectively. LiAl0.1Mn1.9O4 materials showed similar physicochemical propert ies, but they presented very different cycle retention rates in the 3 V reg ion after 50 cycles (Tosoh, 36.2%; Chuodenki, 98.6%). The ex situ X-ray pow der diffraction measurements also revealed that the two LiAl0.1Mn1.9O4 mate rials showed different X-ray patterns after discharge to 2.2 V after 50 cyc les. It was seen that LiAl0.1Mn1.9O4 synthesized using Tosoh Mn3O4 showed a mixture of distinct cubic and many tetragonal phases, but the other one us ing Chuodenki Mn3O4 maintained an almost perfect cubic phase after cycling. We found that the LiAl0.1Mn1.9O4 material might show an entirely different cycle characterization in the 3 V region although it was synthesized using the Mn source of the same crystal structure. (C) 2001 The Electrochemical Society.