One-pot Aerosol Synthesis of Carbon Nanotube-Zn
                        2
                        GeO
                        4
                         Composite Microspheres for Enhanced Lithium-ion Storage Properties

Seung Ho Choi; Jong Hwa Kim; Yun Ju Choi; Yun Chan Kang

doi:10.1016/j.electacta.2015.12.163

One-pot Aerosol Synthesis of Carbon Nanotube-Zn ₂ GeO ₄ Composite Microspheres for Enhanced Lithium-ion Storage Properties

Seung Ho Choi, Jong Hwa Kim, Yun Ju Choi, Yun Chan Kang

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

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	https://doi.org/10.1016/j.electacta.2015.12.163
Publication status	Published - 2016 Feb 1

Keywords

anode material
carbon composite
carbon nanotube
lithium ion battery

ASJC Scopus subject areas

Chemical Engineering(all)
Electrochemistry

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10.1016/j.electacta.2015.12.163

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Choi, S. H., Kim, J. H., Choi, Y. J., & Kang, Y. C. (2016). One-pot Aerosol Synthesis of Carbon Nanotube-Zn ₂ GeO ₄ Composite Microspheres for Enhanced Lithium-ion Storage Properties Electrochimica Acta, 190, 766-774. https://doi.org/10.1016/j.electacta.2015.12.163

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 › peer-review

Choi, SH, Kim, JH, Choi, YJ & Kang, YC 2016, ' One-pot Aerosol Synthesis of Carbon Nanotube-Zn ₂ GeO ₄ Composite Microspheres for Enhanced Lithium-ion Storage Properties ', Electrochimica Acta, vol. 190, pp. 766-774. https://doi.org/10.1016/j.electacta.2015.12.163

Choi SH, Kim JH, Choi YJ, Kang YC. One-pot Aerosol Synthesis of Carbon Nanotube-Zn ₂ GeO ₄ Composite Microspheres for Enhanced Lithium-ion Storage Properties Electrochimica Acta. 2016 Feb 1;190:766-774. https://doi.org/10.1016/j.electacta.2015.12.163

Choi, Seung Ho ; Kim, Jong Hwa ; Choi, Yun Ju ; Kang, Yun Chan. / One-pot Aerosol Synthesis of Carbon Nanotube-Zn ₂ GeO ₄ Composite Microspheres for Enhanced Lithium-ion Storage Properties In: Electrochimica Acta. 2016 ; Vol. 190. pp. 766-774.

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title = " One-pot Aerosol Synthesis of Carbon Nanotube-Zn 2 GeO 4 Composite Microspheres for Enhanced Lithium-ion Storage Properties ",

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. ",

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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

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