Comparison of the electrochemical properties of yolk-shell and dense structured CoFe2O4powders prepared by a spray pyrolysis process

You Na Ko, Seung Bin Park, Jong Heun Lee, Yun Chan Kang

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

CoFe2O4powders with yolk-shell and dense structures are both prepared by a simple spray pyrolysis process with the same preparation conditions. Sucrose dissolved in the spray solution changes the morphology from a dense structure into a yolk-shell structure. In the initial cycle, the yolk-shell CoFe2O4powders exhibit discharge and charge capacities of 1158 and 902 mA h g-1respectively, at a current density of 1 A g-1, while the dense CoFe2O4powders exhibit capacities of 1071 and 677 mA h g-1, respectively. After 200 cycles, the capacity retentions of the yolk-shell and dense powders after the first cycles are 83 and 47%. The yolk-shell powders exhibit not only good cycling stability but also good rate performance compared with the dense powders because of their structural advantages. This journal is

Original languageEnglish
Pages (from-to)40188-40192
Number of pages5
JournalRSC Advances
Volume4
Issue number76
DOIs
Publication statusPublished - 2014 Jan 1

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

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