Effects of cobalt-ion doping on the electrochemical properties of spinel lithium manganese oxide prepared via a reverse-micelle route
Resource
Journal of the European Ceramic Society 23(6), 865–871
Journal
Journal of the European Ceramic Society
Pages
-
Date Issued
2003
Date
2003
Author(s)
Wang, Hsien-Cheng
DOI
246246/2006111501243887
Abstract
Monophasic, ultrafine cobalt ion-doped lithium manganate powders have been prepared via a reverse-micelle process. LiMn1.8Co0.2O4
powders were obtained after heating at 500 C for 2 h. Both the required reaction temperature and duration for synthesizing this
compound were greatly reduced, compared to those in the conventional technique involving solid-state reaction. Increasing the
water to oil (W/O) volume ratio resulted in an increase in the particle size of LiMn1.8Co0.2O4 as well as the formation of impure
Li2MnO3 phase. Nanosized, monophasic powders were obtained when the W/O volume ratio was 1/5. Raising the heating temperature
led to an increase in the crystallite size as well as the particle size of LiMn1.8Co0.2O4. Based on the analytic results of
electrochemical properties, the derived cobalt ion-doped spinel phase was confirmed to exhibit moderate discharge capacity and
improved cycleability at ambient as well as elevated temperatures.
Subjects
Batteries
Electrochemical properties
Li(Mn
Co)2O4
Lithium batteries
Spinels
Publisher
Taipei:National Taiwan University Dept Chem Engn
Type
journal article
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