Please use this identifier to cite or link to this item:
Title: Lithiated O2 phase, Li(2/3)+x(Co0.15Mn0.85)O2 as cathode for Li-ion batteries
Authors: Shaju, K.M. 
Subba Rao, G.V. 
Chowdari, B.V.R. 
Keywords: Cathode material
Layered O2-structure
Li-ion cell and XPS
Issue Date: Dec-2002
Citation: Shaju, K.M., Subba Rao, G.V., Chowdari, B.V.R. (2002-12). Lithiated O2 phase, Li(2/3)+x(Co0.15Mn0.85)O2 as cathode for Li-ion batteries. Solid State Ionics 152-153 : 69-81. ScholarBank@NUS Repository.
Abstract: Synthesis, characterization and cathodic behaviour of O2-phase layered manganese oxides, Li2/3(Co0.15Mn0.85)O2 (O2(Li)) and Li(2/3)+x(Co0.15Mn0.85)O2 (O2(Li+x)) have been reported. The precursor compound for the synthesis is Na2/3(Co0.15Mn0.85)O2. X-ray diffraction (XRD), infra-red (IR) and X-ray photoelectron spectra (XPS) data are consistent with that expected for both the compounds with regard to the structure and valence state. The first-charge capacities of O2(Li) and O2(Li+x) are 129 and 210 mA h/g, respectively, at 0.1 C rate and 2.5-4.6 V (vs. Li). Reversible capacities of 140-150 mA h/g were obtained for both the above compounds and the voltage vs. capacity profile shows an irreversible plateau at 4.3-4.6 V for the first charge, which is in accord with the cyclic voltammograms. An irreversible capacity loss (ICL) of 62 mA h/g is encountered in O2(Li+x) during the first charge and discharge. Performance of the Li-ion cell, C/electrolyte/O2(Li+x) has been evaluated and shows that the ICL of the compound is effectively utilized for the irreversible consumption of lithium by the graphite anode in the Li-ion cell, thereby demonstrating that the compound O2(Li+x) is a viable cathode material. © 2002 Published by Elsevier Science B.V.
Source Title: Solid State Ionics
ISSN: 01672738
DOI: 10.1016/S0167-2738(02)00340-5
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Mar 5, 2021


checked on Mar 5, 2021

Page view(s)

checked on Feb 28, 2021

Google ScholarTM



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