Superior cycling and rate performances of rattle-type CoMoO4 microspheres prepared by one-pot spray pyrolysis

You Na Ko, Yun Chan Kang, Seung Bin Park

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Rattle-type CoMoO4 and CoMoO4-carbon composite microspheres were prepared by one-pot spray pyrolysis at temperatures of 850 and 700 °C, respectively. The XRD patterns of both the samples corresponded to the pure crystal structure of β-CoMoO4. The CoMoO 4-carbon composite microspheres exhibited broad diffraction peaks with relatively lower intensities, when compared to those of rattle-type CoMoO4 microspheres. This indicates the poor crystallinity of the carbon composite powders, despite the similar preparation conditions. In the initial cycles, the rattle-type CoMoO4 microspheres and CoMoO 4-carbon composite microspheres delivered discharge capacities of 1221 and 1245 mA h g-1, respectively at a current density of 500 mA g-1, and charge capacities of 1019 and 896 mA h g-1, respectively, corresponding to Coulombic efficiencies of 83 and 72%, respectively. After 150 cycles, the discharge capacities of the rattle-type and carbon composite microspheres were 1065 and 833 mA h g-1, respectively, and the corresponding capacity retentions measured after the first cycles were 100 and 90%, respectively. The morphology of the rattle-type CoMoO4 microsphere was maintained, despite repeated Li+ insertion and extraction processes, even at a high current density of 500 mA g-1. This journal is

Original languageEnglish
Pages (from-to)17873-17878
Number of pages6
JournalRSC Advances
Volume4
Issue number34
DOIs
Publication statusPublished - 2014 Jan 1
Externally publishedYes

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Spray pyrolysis
Microspheres
Carbon
Composite materials
Current density
Powders
Diffraction
Crystal structure

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Superior cycling and rate performances of rattle-type CoMoO4 microspheres prepared by one-pot spray pyrolysis. / Ko, You Na; Kang, Yun Chan; Park, Seung Bin.

In: RSC Advances, Vol. 4, No. 34, 01.01.2014, p. 17873-17878.

Research output: Contribution to journalArticle

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