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Topotactic Conversion Route to Mesoporous Quasi‐Single‐Crystalline Co 3 O 4 Nanobelts with Optimizable Electrochemical Performance

The growth of mesoporous quasi‐single‐crystalline CoO nanobelts by topotactic chemical transformation from ‐Co(OH) nanobelts is realized. During the topotactic transformation process, the primary ‐Co(OH) nanobelt frameworks can be preserved. The phases, crystal structures, morphologies, and growth b... Full description

Journal Title: Advanced Functional Materials 22 February 2010, Vol.20(4), pp.617-623
Main Author: Tian, Li
Other Authors: Zou, Hongli , Fu, Junxiang , Yang, Xianfeng , Wang, Yi , Guo, Hongliang , Fu, Xionghui , Liang, Chaolun , Wu, Mingmei , Shen, Pei Kang , Gao, Qiuming
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 1616-301X ; E-ISSN: 1616-3028 ; DOI: 10.1002/adfm.200901503
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recordid: wj10.1002/adfm.200901503
title: Topotactic Conversion Route to Mesoporous Quasi‐Single‐Crystalline Co 3 O 4 Nanobelts with Optimizable Electrochemical Performance
format: Article
creator:
  • Tian, Li
  • Zou, Hongli
  • Fu, Junxiang
  • Yang, Xianfeng
  • Wang, Yi
  • Guo, Hongliang
  • Fu, Xionghui
  • Liang, Chaolun
  • Wu, Mingmei
  • Shen, Pei Kang
  • Gao, Qiuming
subjects:
  • Layered Materials
  • Porous Materials
  • Nanobelts
  • Spinels
  • Cobalt Oxide
  • Hydrotalcite
  • Batteries
ispartof: Advanced Functional Materials, 22 February 2010, Vol.20(4), pp.617-623
description: The growth of mesoporous quasi‐single‐crystalline CoO nanobelts by topotactic chemical transformation from ‐Co(OH) nanobelts is realized. During the topotactic transformation process, the primary ‐Co(OH) nanobelt frameworks can be preserved. The phases, crystal structures, morphologies, and growth behavior of both the precursory and resultant products are characterized by powder X‐ray diffraction (XRD), electron microscopy—scanning electron (SEM) and transmission electron (TEM) microscopy, and selected area electron diffraction (SAED). Detailed investigation of the formation mechanism of the porous CoO nanobelts indicates topotactic nucleation and oriented growth of textured spinel CoO nanowalls (nanoparticles) inside the nanobelts. CoO nanocrystals prefer [0001] epitaxial growth direction of hexagonal ‐Co(OH) nanobelts due to the structural matching of [0001] ‐Co(OH)//[111] CoO. The surface‐areas and pore sizes of the spinel CoO products can be tuned through heat treatment of ‐Co(OH) precursors at different temperatures. The galvanostatic cycling measurement of the CoO products indicates that their charge–discharge performance can be optimized. In the voltage range of 0.0–3.0 V versus Li/Li at 40 mA g, reversible capacities of a sample consisting of mesoporous quasi‐single‐crystalline CoO nanobelts can reach up to 1400 mA h g, much larger than the theoretical capacity of bulk CoO (892 mA h g). comprising textured spinel CoO nanowalls are fabricated via a versatile topotactic transition route from layered hydrotalcite‐structured ‐Co(OH). The synthesis is made possible by the structural match between (0001) Co(OH) and (111) CoO planes.
language: eng
source:
identifier: ISSN: 1616-301X ; E-ISSN: 1616-3028 ; DOI: 10.1002/adfm.200901503
fulltext: fulltext
issn:
  • 1616-301X
  • 1616301X
  • 1616-3028
  • 16163028
url: Link


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titleTopotactic Conversion Route to Mesoporous Quasi‐Single‐Crystalline Co 3 O 4 Nanobelts with Optimizable Electrochemical Performance
creatorTian, Li ; Zou, Hongli ; Fu, Junxiang ; Yang, Xianfeng ; Wang, Yi ; Guo, Hongliang ; Fu, Xionghui ; Liang, Chaolun ; Wu, Mingmei ; Shen, Pei Kang ; Gao, Qiuming
ispartofAdvanced Functional Materials, 22 February 2010, Vol.20(4), pp.617-623
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subjectLayered Materials ; Porous Materials ; Nanobelts ; Spinels ; Cobalt Oxide ; Hydrotalcite ; Batteries
descriptionThe growth of mesoporous quasi‐single‐crystalline CoO nanobelts by topotactic chemical transformation from ‐Co(OH) nanobelts is realized. During the topotactic transformation process, the primary ‐Co(OH) nanobelt frameworks can be preserved. The phases, crystal structures, morphologies, and growth behavior of both the precursory and resultant products are characterized by powder X‐ray diffraction (XRD), electron microscopy—scanning electron (SEM) and transmission electron (TEM) microscopy, and selected area electron diffraction (SAED). Detailed investigation of the formation mechanism of the porous CoO nanobelts indicates topotactic nucleation and oriented growth of textured spinel CoO nanowalls (nanoparticles) inside the nanobelts. CoO nanocrystals prefer [0001] epitaxial growth direction of hexagonal ‐Co(OH) nanobelts due to the structural matching of [0001] ‐Co(OH)//[111] CoO. The surface‐areas and pore sizes of the spinel CoO products can be tuned through heat treatment of ‐Co(OH) precursors at different temperatures. The galvanostatic cycling measurement of the CoO products indicates that their charge–discharge performance can be optimized. In the voltage range of 0.0–3.0 V versus Li/Li at 40 mA g, reversible capacities of a sample consisting of mesoporous quasi‐single‐crystalline CoO nanobelts can reach up to 1400 mA h g, much larger than the theoretical capacity of bulk CoO (892 mA h g). comprising textured spinel CoO nanowalls are fabricated via a versatile topotactic transition route from layered hydrotalcite‐structured ‐Co(OH). The synthesis is made possible by the structural match between (0001) Co(OH) and (111) CoO planes.
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titleTopotactic Conversion Route to Mesoporous Quasi‐Single‐Crystalline Co 3 O 4 Nanobelts with Optimizable Electrochemical Performance
descriptionThe growth of mesoporous quasi‐single‐crystalline CoO nanobelts by topotactic chemical transformation from ‐Co(OH) nanobelts is realized. During the topotactic transformation process, the primary ‐Co(OH) nanobelt frameworks can be preserved. The phases, crystal structures, morphologies, and growth behavior of both the precursory and resultant products are characterized by powder X‐ray diffraction (XRD), electron microscopy—scanning electron (SEM) and transmission electron (TEM) microscopy, and selected area electron diffraction (SAED). Detailed investigation of the formation mechanism of the porous CoO nanobelts indicates topotactic nucleation and oriented growth of textured spinel CoO nanowalls (nanoparticles) inside the nanobelts. CoO nanocrystals prefer [0001] epitaxial growth direction of hexagonal ‐Co(OH) nanobelts due to the structural matching of [0001] ‐Co(OH)//[111] CoO. The surface‐areas and pore sizes of the spinel CoO products can be tuned through heat treatment of ‐Co(OH) precursors at different temperatures. The galvanostatic cycling measurement of the CoO products indicates that their charge–discharge performance can be optimized. In the voltage range of 0.0–3.0 V versus Li/Li at 40 mA g, reversible capacities of a sample consisting of mesoporous quasi‐single‐crystalline CoO nanobelts can reach up to 1400 mA h g, much larger than the theoretical capacity of bulk CoO (892 mA h g). comprising textured spinel CoO nanowalls are fabricated via a versatile topotactic transition route from layered hydrotalcite‐structured ‐Co(OH). The synthesis is made possible by the structural match between (0001) Co(OH) and (111) CoO planes.
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abstractThe growth of mesoporous quasi‐single‐crystalline CoO nanobelts by topotactic chemical transformation from ‐Co(OH) nanobelts is realized. During the topotactic transformation process, the primary ‐Co(OH) nanobelt frameworks can be preserved. The phases, crystal structures, morphologies, and growth behavior of both the precursory and resultant products are characterized by powder X‐ray diffraction (XRD), electron microscopy—scanning electron (SEM) and transmission electron (TEM) microscopy, and selected area electron diffraction (SAED). Detailed investigation of the formation mechanism of the porous CoO nanobelts indicates topotactic nucleation and oriented growth of textured spinel CoO nanowalls (nanoparticles) inside the nanobelts. CoO nanocrystals prefer [0001] epitaxial growth direction of hexagonal ‐Co(OH) nanobelts due to the structural matching of [0001] ‐Co(OH)//[111] CoO. The surface‐areas and pore sizes of the spinel CoO products can be tuned through heat treatment of ‐Co(OH) precursors at different temperatures. The galvanostatic cycling measurement of the CoO products indicates that their charge–discharge performance can be optimized. In the voltage range of 0.0–3.0 V versus Li/Li at 40 mA g, reversible capacities of a sample consisting of mesoporous quasi‐single‐crystalline CoO nanobelts can reach up to 1400 mA h g, much larger than the theoretical capacity of bulk CoO (892 mA h g). comprising textured spinel CoO nanowalls are fabricated via a versatile topotactic transition route from layered hydrotalcite‐structured ‐Co(OH). The synthesis is made possible by the structural match between (0001) Co(OH) and (111) CoO planes.
copWeinheim
pubWILEY‐VCH Verlag
doi10.1002/adfm.200901503
pages617-623
date2010-02-22