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 language | English |
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Pages (from-to) | 40188-40192 |
Number of pages | 5 |
Journal | RSC Advances |
Volume | 4 |
Issue number | 76 |
DOIs | |
Publication status | Published - 2014 Jan 1 |
ASJC Scopus subject areas
- Chemical Engineering(all)
- Chemistry(all)