Abstract
A continuous one-pot method was employed to synthesize yolk-shell and single-crystalline cubic NiO powders in a few seconds. Submicrometer-sized NiO yolk-shell particles were prepared by spray pyrolysis at 900 C. Single-crystalline cubic NiO nanopowders were prepared by one-pot flame spray pyrolysis from NiO vapors. Particle surface areas of the yolk-shell and single-crystalline cubic NiO powders as obtained using the Brunauer-Emmett- Teller method were 8 and 5 m2 g-1, respectively. The mean crystallite sizes of the yolk-shell-structured and cubic NiO powders were 50 and 80 nm, respectively. The yolk-shell and single-crystalline cubic NiO powders delivered discharge capacities of 951 and 416 mA h g-1, respectively, after 150 cycles, and the corresponding capacity retentions measured after the first cycle were 106 and 66%, respectively. The yolk-shell-structured NiO powders showed rate performance better than that of the single-crystalline cubic NiO nanopowders. Even at a high current density of 1 A g-1, the discharge capacity of the yolk-shell-structured NiO powders was as high as 824 mA h g-1 after 50 cycles, in which the current densities were increased stepwise.
| Original language | English |
|---|---|
| Pages (from-to) | 2312-2316 |
| Number of pages | 5 |
| Journal | ACS Applied Materials and Interfaces |
| Volume | 6 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2014 Feb 26 |
| Externally published | Yes |
Fingerprint
Keywords
- anode material
- flame spray pyrolysis
- lithium ion battery
- nanocubic
- spray pyrolysis
- yolk shell
ASJC Scopus subject areas
- Materials Science(all)
Cite this
Ultrafast synthesis of yolk-shell and cubic NiO nanopowders and application in lithium ion batteries. / Choi, Seung Ho; Kang, Yun Chan.
In: ACS Applied Materials and Interfaces, Vol. 6, No. 4, 26.02.2014, p. 2312-2316.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Ultrafast synthesis of yolk-shell and cubic NiO nanopowders and application in lithium ion batteries
AU - Choi, Seung Ho
AU - Kang, Yun Chan
PY - 2014/2/26
Y1 - 2014/2/26
N2 - A continuous one-pot method was employed to synthesize yolk-shell and single-crystalline cubic NiO powders in a few seconds. Submicrometer-sized NiO yolk-shell particles were prepared by spray pyrolysis at 900 C. Single-crystalline cubic NiO nanopowders were prepared by one-pot flame spray pyrolysis from NiO vapors. Particle surface areas of the yolk-shell and single-crystalline cubic NiO powders as obtained using the Brunauer-Emmett- Teller method were 8 and 5 m2 g-1, respectively. The mean crystallite sizes of the yolk-shell-structured and cubic NiO powders were 50 and 80 nm, respectively. The yolk-shell and single-crystalline cubic NiO powders delivered discharge capacities of 951 and 416 mA h g-1, respectively, after 150 cycles, and the corresponding capacity retentions measured after the first cycle were 106 and 66%, respectively. The yolk-shell-structured NiO powders showed rate performance better than that of the single-crystalline cubic NiO nanopowders. Even at a high current density of 1 A g-1, the discharge capacity of the yolk-shell-structured NiO powders was as high as 824 mA h g-1 after 50 cycles, in which the current densities were increased stepwise.
AB - A continuous one-pot method was employed to synthesize yolk-shell and single-crystalline cubic NiO powders in a few seconds. Submicrometer-sized NiO yolk-shell particles were prepared by spray pyrolysis at 900 C. Single-crystalline cubic NiO nanopowders were prepared by one-pot flame spray pyrolysis from NiO vapors. Particle surface areas of the yolk-shell and single-crystalline cubic NiO powders as obtained using the Brunauer-Emmett- Teller method were 8 and 5 m2 g-1, respectively. The mean crystallite sizes of the yolk-shell-structured and cubic NiO powders were 50 and 80 nm, respectively. The yolk-shell and single-crystalline cubic NiO powders delivered discharge capacities of 951 and 416 mA h g-1, respectively, after 150 cycles, and the corresponding capacity retentions measured after the first cycle were 106 and 66%, respectively. The yolk-shell-structured NiO powders showed rate performance better than that of the single-crystalline cubic NiO nanopowders. Even at a high current density of 1 A g-1, the discharge capacity of the yolk-shell-structured NiO powders was as high as 824 mA h g-1 after 50 cycles, in which the current densities were increased stepwise.
KW - anode material
KW - flame spray pyrolysis
KW - lithium ion battery
KW - nanocubic
KW - spray pyrolysis
KW - yolk shell
UR - http://www.scopus.com/inward/record.url?scp=84896876116&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84896876116&partnerID=8YFLogxK
U2 - 10.1021/am404232x
DO - 10.1021/am404232x
M3 - Article
VL - 6
SP - 2312
EP - 2316
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
SN - 1944-8244
IS - 4
ER -