Please use this identifier to cite or link to this item:
Title: Synthesis and Cathodic Properties of LiCo1-yRhyO2 (0 ≤ y ≤ 0.2) and LiRhO2
Authors: Madhavi, S.
Subba Rao, G.V.
Chowdari, B.V.R. 
Li, S.F.Y. 
Issue Date: Nov-2001
Citation: Madhavi, S., Subba Rao, G.V., Chowdari, B.V.R., Li, S.F.Y. (2001-11). Synthesis and Cathodic Properties of LiCo1-yRhyO2 (0 ≤ y ≤ 0.2) and LiRhO2. Journal of the Electrochemical Society 148 (11) : A1279-A1286. ScholarBank@NUS Repository.
Abstract: Compounds of the formula LiCo1-yRhyO2 (0.0 ≤ y ≤ 0.20 and y = 1.0) have been synthesized by high temperature solid-state reaction and characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy, and infrared spectroscopy. Single-phase materials were obtained for y ≤ 0.10 and y = 1.0 as observed by XRD. However, IR and electrochemical data indicate that the true solid solubility may be y ≤ 0.05. Their cathodic behavior in coin cells with Li metal as anode and a liquid electrolyte has been examined. Cyclic voltammograms and galvanostatic charge/discharge curves show that for y = 0.05, the phase transformation occurring at x = 0.5 in Li1-xCoO2 is suppressed and the deintercalation voltage is decreased. The compositions with y = 0.05 and 0.10 show improved cathodic behavior and discharge capacity retention compared to LiCoO2 (y = 0) at 0.14C rate in the voltage range 2.7-4.3 V up to 18 cycles. Electrochemical studies on LiRhO2 show that phase transitions occur on charge/ discharge cycling (varying x in Li1-xRhO2) in the voltage window 3.2-3.7 V and these are reversible. This compound shows an initial charge capacity of 162 mAh/g when charged to 4.0 V (vs. Li metal), corresponding to x = 0.85 in Li1-xRhO2. After an initial loss of 40 mAh/g in capacity, the discharge capacity retention corresponds to 90% after 18 cycles with respect to the initial discharge capacity in the voltage window, 2.7-4.0 V. © 2001 The Electrochemical Society. All rights reserved.
Source Title: Journal of the Electrochemical Society
ISSN: 00134651
DOI: 10.1149/1.1410968
Appears in Collections:Staff Publications

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


checked on Jan 13, 2022


checked on Jan 13, 2022

Page view(s)

checked on Jan 13, 2022

Google ScholarTM



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