Abstract
Three-dimensional (3D) carbon nanotube (CNT)-multicomponent metal oxide composite microspheres with non-aggregation characteristics are prepared using a simple one-pot spray pyrolysis process, applying water-soluble metal salt and oxidized CNT fibers. The hierarchical porous 3D structure of the CNT is formed by networking the flexible CNTs with a high aspect ratio during the drying stage of a droplet. Subsequently, the Zn and Ge salts are deposited over the CNTs to form the ZnO-CNT and GeO 2 -CNT composite microsphere. Decomposition of Zn and Ge salts into their respective oxides and the conversion reaction to form Zn 2 GeO 4 at 700 °C, produce the Zn 2 GeO 4 -CNT composite microsphere. The initial discharge capacities of the Zn 2 GeO 4 , Zn 2 GeO 4 -CNT, ZnO-CNT, and GeO 2 -CNT microspheres, at a current density of 1.5 A g -1 , are 1351, 1211, 1387, and 1631 mA h g -1 , respectively, and their discharge capacities at the 300 th cycle are 415, 762, 261, and 480 mA h g -1 , respectively. The CNT-Zn 2 GeO 4 composite microspheres, selected as the first target material, show electrochemical properties superior to those of the bare Zn 2 GeO 4 , CNT-ZnO, and CNT-GeO 2 composite microspheres. The synergetic effect of the multicomponent composition of Zn 2 GeO 4 and the CNT support result in excellent Li-ion storage properties of the Zn 2 GeO 4 -CNT composite microspheres.
| Original language | English |
|---|---|
| Pages (from-to) | 766-774 |
| Number of pages | 9 |
| Journal | Electrochimica Acta |
| Volume | 190 |
| DOIs | |
| Publication status | Published - 2016 Feb 1 |
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Keywords
- anode material
- carbon composite
- carbon nanotube
- lithium ion battery
ASJC Scopus subject areas
- Chemical Engineering(all)
- Electrochemistry
Cite this
One-pot Aerosol Synthesis of Carbon Nanotube-Zn 2 GeO 4 Composite Microspheres for Enhanced Lithium-ion Storage Properties . / Choi, Seung Ho; Kim, Jong Hwa; Choi, Yun Ju; Kang, Yun Chan.
In: Electrochimica Acta, Vol. 190, 01.02.2016, p. 766-774.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - One-pot Aerosol Synthesis of Carbon Nanotube-Zn 2 GeO 4 Composite Microspheres for Enhanced Lithium-ion Storage Properties
AU - Choi, Seung Ho
AU - Kim, Jong Hwa
AU - Choi, Yun Ju
AU - Kang, Yun Chan
PY - 2016/2/1
Y1 - 2016/2/1
N2 - Three-dimensional (3D) carbon nanotube (CNT)-multicomponent metal oxide composite microspheres with non-aggregation characteristics are prepared using a simple one-pot spray pyrolysis process, applying water-soluble metal salt and oxidized CNT fibers. The hierarchical porous 3D structure of the CNT is formed by networking the flexible CNTs with a high aspect ratio during the drying stage of a droplet. Subsequently, the Zn and Ge salts are deposited over the CNTs to form the ZnO-CNT and GeO 2 -CNT composite microsphere. Decomposition of Zn and Ge salts into their respective oxides and the conversion reaction to form Zn 2 GeO 4 at 700 °C, produce the Zn 2 GeO 4 -CNT composite microsphere. The initial discharge capacities of the Zn 2 GeO 4 , Zn 2 GeO 4 -CNT, ZnO-CNT, and GeO 2 -CNT microspheres, at a current density of 1.5 A g -1 , are 1351, 1211, 1387, and 1631 mA h g -1 , respectively, and their discharge capacities at the 300 th cycle are 415, 762, 261, and 480 mA h g -1 , respectively. The CNT-Zn 2 GeO 4 composite microspheres, selected as the first target material, show electrochemical properties superior to those of the bare Zn 2 GeO 4 , CNT-ZnO, and CNT-GeO 2 composite microspheres. The synergetic effect of the multicomponent composition of Zn 2 GeO 4 and the CNT support result in excellent Li-ion storage properties of the Zn 2 GeO 4 -CNT composite microspheres.
AB - Three-dimensional (3D) carbon nanotube (CNT)-multicomponent metal oxide composite microspheres with non-aggregation characteristics are prepared using a simple one-pot spray pyrolysis process, applying water-soluble metal salt and oxidized CNT fibers. The hierarchical porous 3D structure of the CNT is formed by networking the flexible CNTs with a high aspect ratio during the drying stage of a droplet. Subsequently, the Zn and Ge salts are deposited over the CNTs to form the ZnO-CNT and GeO 2 -CNT composite microsphere. Decomposition of Zn and Ge salts into their respective oxides and the conversion reaction to form Zn 2 GeO 4 at 700 °C, produce the Zn 2 GeO 4 -CNT composite microsphere. The initial discharge capacities of the Zn 2 GeO 4 , Zn 2 GeO 4 -CNT, ZnO-CNT, and GeO 2 -CNT microspheres, at a current density of 1.5 A g -1 , are 1351, 1211, 1387, and 1631 mA h g -1 , respectively, and their discharge capacities at the 300 th cycle are 415, 762, 261, and 480 mA h g -1 , respectively. The CNT-Zn 2 GeO 4 composite microspheres, selected as the first target material, show electrochemical properties superior to those of the bare Zn 2 GeO 4 , CNT-ZnO, and CNT-GeO 2 composite microspheres. The synergetic effect of the multicomponent composition of Zn 2 GeO 4 and the CNT support result in excellent Li-ion storage properties of the Zn 2 GeO 4 -CNT composite microspheres.
KW - anode material
KW - carbon composite
KW - carbon nanotube
KW - lithium ion battery
UR - http://www.scopus.com/inward/record.url?scp=84954286272&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84954286272&partnerID=8YFLogxK
U2 - 10.1016/j.electacta.2015.12.163
DO - 10.1016/j.electacta.2015.12.163
M3 - Article
AN - SCOPUS:84954286272
VL - 190
SP - 766
EP - 774
JO - Electrochimica Acta
JF - Electrochimica Acta
SN - 0013-4686
ER -