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Hierarchical Graphene-Encapsulated Hollow SnO2@SnS2 Nanostructures with Enhanced Lithium Storage Capability.

Complex hierarchical structures have received tremendous attention due to their superior properties over their constitute components. In this study, hierarchical graphene-encapsulated hollow SnO2@SnS2 nanostructures are successfully prepared by in situ sulfuration on the backbones of hollow SnO2 sph... Full description

Journal Title: ACS applied materials & interfaces October 14, 2015, Vol.7(40), pp.22533-22541
Main Author: Xu, Wangwang
Other Authors: Xie, Zhiqiang , Cui, Xiaodan , Zhao, Kangning , Zhang, Lei , Dietrich, Grant , Dooley, Kerry M , Wang, Ying
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: E-ISSN: 1944-8252 ; DOI: 1944-8252 ; DOI: 10.1021/acsami.5b06765
Link: http://search.proquest.com/docview/1722420174/?pq-origsite=primo
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title: Hierarchical Graphene-Encapsulated Hollow SnO2@SnS2 Nanostructures with Enhanced Lithium Storage Capability.
format: Article
creator:
  • Xu, Wangwang
  • Xie, Zhiqiang
  • Cui, Xiaodan
  • Zhao, Kangning
  • Zhang, Lei
  • Dietrich, Grant
  • Dooley, Kerry M
  • Wang, Ying
subjects:
  • Anode
  • Graphene
  • Hierarchical Nanostructure
  • Lithium Ion Battery
  • Tin Dioxide
  • Tin Disulfide
ispartof: ACS applied materials & interfaces, October 14, 2015, Vol.7(40), pp.22533-22541
description: Complex hierarchical structures have received tremendous attention due to their superior properties over their constitute components. In this study, hierarchical graphene-encapsulated hollow SnO2@SnS2 nanostructures are successfully prepared by in situ sulfuration on the backbones of hollow SnO2 spheres via a simple hydrothermal method followed by a solvothermal surface modification. The as-prepared hierarchical SnO2@SnS2@rGO nanocomposite can be used as anode material in lithium ion batteries, exhibiting excellent cyclability with a capacity of 583 mAh/g after 100 electrochemical cycles at a specific current of 200 mA/g. This material shows a very low capacity fading of only 0.273% per cycle from the second to the 100th cycle, lower than the capacity degradation of bare SnO2 hollow spheres (0.830%) and single SnS2 nanosheets (0.393%). Even after being cycled at a range of specific currents varied from 100 mA/g to 2000 mA/g, hierarchical SnO2@SnS2@rGO nanocomposites maintain a reversible capacity of 664 mAh/g, which is much higher than single SnS2 nanosheets (374 mAh/g) and bare SnO2 hollow spheres (177 mAh/g). Such significantly improved electrochemical performance can be attributed to the unique hierarchical hollow structure, which not only effectively alleviates the stress resulting from the lithiation/delithiation process and maintaining structural stability during cycling but also reduces aggregation and facilitates ion transport. This work thus demonstrates the great potential of hierarchical SnO2@SnS2@rGO nanocomposites for applications as a high-performance anode material in next-generation lithium ion battery technology.
language: eng
source:
identifier: E-ISSN: 1944-8252 ; DOI: 1944-8252 ; DOI: 10.1021/acsami.5b06765
fulltext: no_fulltext
issn:
  • 19448252
  • 1944-8252
url: Link


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titleHierarchical Graphene-Encapsulated Hollow SnO2@SnS2 Nanostructures with Enhanced Lithium Storage Capability.
creatorXu, Wangwang ; Xie, Zhiqiang ; Cui, Xiaodan ; Zhao, Kangning ; Zhang, Lei ; Dietrich, Grant ; Dooley, Kerry M ; Wang, Ying
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descriptionComplex hierarchical structures have received tremendous attention due to their superior properties over their constitute components. In this study, hierarchical graphene-encapsulated hollow SnO2@SnS2 nanostructures are successfully prepared by in situ sulfuration on the backbones of hollow SnO2 spheres via a simple hydrothermal method followed by a solvothermal surface modification. The as-prepared hierarchical SnO2@SnS2@rGO nanocomposite can be used as anode material in lithium ion batteries, exhibiting excellent cyclability with a capacity of 583 mAh/g after 100 electrochemical cycles at a specific current of 200 mA/g. This material shows a very low capacity fading of only 0.273% per cycle from the second to the 100th cycle, lower than the capacity degradation of bare SnO2 hollow spheres (0.830%) and single SnS2 nanosheets (0.393%). Even after being cycled at a range of specific currents varied from 100 mA/g to 2000 mA/g, hierarchical SnO2@SnS2@rGO nanocomposites maintain a reversible capacity of 664 mAh/g, which is much higher than single SnS2 nanosheets (374 mAh/g) and bare SnO2 hollow spheres (177 mAh/g). Such significantly improved electrochemical performance can be attributed to the unique hierarchical hollow structure, which not only effectively alleviates the stress resulting from the lithiation/delithiation process and maintaining structural stability during cycling but also reduces aggregation and facilitates ion transport. This work thus demonstrates the great potential of hierarchical SnO2@SnS2@rGO nanocomposites for applications as a high-performance anode material in next-generation lithium ion battery technology.
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