Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.electacta.2008.12.049
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dc.titleCarbothermal synthesis, spectral and magnetic characterization and Li-cyclability of the Mo-cluster compounds, LiYMo3O8 and Mn2Mo3O8
dc.contributor.authorDas, B.
dc.contributor.authorReddy, M.V.
dc.contributor.authorKrishnamoorthi, C.
dc.contributor.authorTripathy, S.
dc.contributor.authorMahendiran, R.
dc.contributor.authorRao, G.V.S.
dc.contributor.authorChowdari, B.V.R.
dc.date.accessioned2014-10-16T09:17:27Z
dc.date.available2014-10-16T09:17:27Z
dc.date.issued2009-04-30
dc.identifier.citationDas, B., Reddy, M.V., Krishnamoorthi, C., Tripathy, S., Mahendiran, R., Rao, G.V.S., Chowdari, B.V.R. (2009-04-30). Carbothermal synthesis, spectral and magnetic characterization and Li-cyclability of the Mo-cluster compounds, LiYMo3O8 and Mn2Mo3O8. Electrochimica Acta 54 (12) : 3360-3373. ScholarBank@NUS Repository. https://doi.org/10.1016/j.electacta.2008.12.049
dc.identifier.issn00134686
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/95926
dc.description.abstractThe molybdenum cluster compounds, LiYMo3O8 and Mn2Mo3O8 are prepared by the carbothermal reduction method and characterized by various techniques. The FT-IR at ambient temperature (RT), and Raman spectra at various temperatures (78-450 K) are reported for the first time and results are interpreted. Magnetic studies on Mn2Mo3O8 in the temperature range, 10-350 K confirm that it is ferrimagnetic, with TC = 39 K. Magnetic hysteresis and magnetization data at various fields and temperatures are presented. The Li-cyclability is investigated by galvanostatic cycling in the voltage range, 0.005-3.0 V vs. Li at 30 mA/g (0.08 C). LiYMo3O8 shows a total first-discharge capacity of 305 ±5 mAh/g whereas the first-charge capacity is only 180 mAh/g at RT. However, both values increased systematically with an increase in the cycle number and yielded a reversible capacity of 385 ±5 mAh/g at the end of 120th cycle. At 50 °C, the reversible capacity is 418 ±5 mAh/g at the 60th cycle. The coulombic efficiency ranges from 94% to 98%. The Li-cyclability behavior of Mn2Mo3O8 is entirely different from that of LiYMo3O8. The total first-discharge and charge capacities are 710 ± 5 and 565 ±5 mAh/g, but drastic capacity-fading occurs during cycling. The reversible capacity at the end of 50th cycle is only 205 ±5 mAh/g. Plausible reaction mechanisms are proposed and discussed based on the galavanostatic cycling, cyclic voltammetry, ex situ XRD, ex situ TEM and impedance spectral data. © 2009.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.electacta.2008.12.049
dc.sourceScopus
dc.subjectCarbothermal reduction
dc.subjectFT-IR spectra
dc.subjectLi-cycling
dc.subjectLiYMo3O8
dc.subjectMagnetic properties
dc.subjectMn2Mo3O8
dc.subjectRaman spectra
dc.typeArticle
dc.contributor.departmentPHYSICS
dc.description.doi10.1016/j.electacta.2008.12.049
dc.description.sourcetitleElectrochimica Acta
dc.description.volume54
dc.description.issue12
dc.description.page3360-3373
dc.description.codenELCAA
dc.identifier.isiut000265011700017
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