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 -