Carbon-coated nanophase CaMoO4 as anode material for Li ion batteries

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Carbon-coated nanophase CaMoO4 as anode material for Li ion batteries

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dc.contributor.author Sharma, N.
dc.contributor.author Shaju, K. M.
dc.contributor.author Rao, G. V. Subba
dc.contributor.author Chowdari, Bobba V. R.
dc.contributor.author Dong, Zhili
dc.contributor.author White, Timothy John
dc.date.accessioned 2012-01-06T03:51:08Z
dc.date.available 2012-01-06T03:51:08Z
dc.date.copyright 2004
dc.date.issued 2012-01-06
dc.identifier.citation Sharma, N., Shaju, K. M., Rao, G. V. S., Chowdari, B. V. R., Dong, Z. L., & White, T. J. (2004). Carbon-Coated Nanophase CaMoO4 as Anode Material for Li Ion Batteries, Chemistry of Materials, 16(3), 504-512.
dc.identifier.uri http://hdl.handle.net/10220/7447
dc.description.abstract Pure and carbon (C)-coated CaMoO4 were synthesized by solution precipitation and solgel 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 CaMoO4 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.
dc.language.iso en
dc.relation.ispartofseries Chemistry of materials
dc.rights © 2004 American Chemical Society.
dc.subject DRNTU::Engineering::Materials::Nanostructured materials.
dc.title Carbon-coated nanophase CaMoO4 as anode material for Li ion batteries
dc.type Journal Article
dc.contributor.school School of Materials Science and Engineering
dc.identifier.doi http://dx.doi.org/10.1021/cm0348287

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