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 language | English |
|---|---|
| Pages (from-to) | 17873-17878 |
| Number of pages | 6 |
| Journal | RSC Advances |
| Volume | 4 |
| Issue number | 34 |
| DOIs | |
| Publication status | Published - 2014 Jan 1 |
| Externally published | Yes |
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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 journal › Article
}
TY - JOUR
T1 - Superior cycling and rate performances of rattle-type CoMoO4 microspheres prepared by one-pot spray pyrolysis
AU - Ko, You Na
AU - Kang, Yun Chan
AU - Park, Seung Bin
PY - 2014/1/1
Y1 - 2014/1/1
N2 - 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
AB - 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
UR - http://www.scopus.com/inward/record.url?scp=84898772273&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84898772273&partnerID=8YFLogxK
U2 - 10.1039/c4ra01278j
DO - 10.1039/c4ra01278j
M3 - Article
AN - SCOPUS:84898772273
VL - 4
SP - 17873
EP - 17878
JO - RSC Advances
JF - RSC Advances
SN - 2046-2069
IS - 34
ER -