Please use this identifier to cite or link to this item:
https://doi.org/10.1021/cm0348287
Title: | Carbon-Coated Nanophase CaMoO4 as Anode Material for Li Ion Batteries | Authors: | Sharma, N. Shaju, K.M. Subba Rao, G.V. Chowdari, B.V.R. Dong, Z.L. White, T.J. |
Issue Date: | 10-Feb-2004 | Citation: | Sharma, N., Shaju, K.M., Subba Rao, G.V., Chowdari, B.V.R., Dong, Z.L., White, T.J. (2004-02-10). Carbon-Coated Nanophase CaMoO4 as Anode Material for Li Ion Batteries. Chemistry of Materials 16 (3) : 504-512. ScholarBank@NUS Repository. https://doi.org/10.1021/cm0348287 | Abstract: | Pure and carbon (C)-coated CaMoO4 were synthesized by solution precipitation and sol-gel methods, and their electrochemical properties were studied vs Li by galvanostatic cycling and cyclic voltammetry (CV). Combined X-ray diffraction, SEM, and TEM results revealed the formation of nanocrystalline particles with the scheelite structure, the morphology being a function of the synthetic procedure. TEM of 10% C-coated CaMoO4 shows the amorphous nature of carbon on the crystalline particles with a thickness of 8-12 nm. Galvanostatic data in the voltage range of 0.005-2.5 V up to 50 cycles at a rate of 60 mA/g revealed that the 10% C-coated CaMoO 4 gave the highest reversible capacities. At the 20th discharge cycle, the capacity values (mA h/g) are as follows: solution precipitated, 190; sol-gel, 268; 5% C-coated, 401; and 10% C-coated, 508. The latter value corresponds to 3.8 mol of recyclable Li. The improvement in the interparticle electronic conductivity imparted by the C-coating led to superior performance. The Coulombic efficiency for all the compositions is >98%. Galvanostatic cycling results are supplemented by the CV data. A plausible mechanism for charge-discharge cycling has been proposed. | Source Title: | Chemistry of Materials | URI: | http://scholarbank.nus.edu.sg/handle/10635/95925 | ISSN: | 08974756 | DOI: | 10.1021/cm0348287 |
Appears in Collections: | Staff Publications |
Show full item record
Files in This Item:
There are no files associated with this item.
SCOPUSTM
Citations
128
checked on Jan 31, 2023
WEB OF SCIENCETM
Citations
128
checked on Jan 31, 2023
Page view(s)
186
checked on Feb 2, 2023
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.