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N-Doped Graphene–VO2(B) Nanosheet-Built 3D Flower Hybrid for Lithium Ion Battery

Nethravathi, C., Rajamathi, Catherine R., Rajamathi, Michael, Gautam, Ujjal K., Wang, Xi, Golberg, Dmitri, Bando, Yoshio·2013·ACS Applied Materials & Interfaces

Abstract

Recently, we have shown that the graphene-VO2(B) nanotube hybrid is a promising lithium ion battery cathode material (Nethravathi et al. Carbon, 2012, 50, 4839-4846). Though the observed capacity of this material was quite satisfactory, the rate capability was not. To improve the rate capability we wanted to prepare a graphene-VO2(B) hybrid in which the VO2(B) would be built on 2D nanosheets that would enable better electrode-electrolyte contact. Such a material, a N-doped graphene-VO2(B) nanosheet-built 3D flower hybrid, is fabricated by a single-step hydrothermal reaction within a mixture of ammonium vanadate and colloidal dispersion of graphite oxide. The 3D VO2(B) flowers which are uniformly distributed on N-doped graphene are composed of ultrathin 2D nanosheets. When used in lithium ion batteries, this material exhibits a large capacity, high rate capability, and excellent cycling stability. The enhanced performance results from its unique features: excellent electronic conductivity associated with the N-doped graphene, short transportation length for lithium ions related to ultrathin nanosheets, and improved charge transfer due to the anchoring of the VO2(B) flowers to N-doped graphene.

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Crossref · 10.1021/am400202v

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Metadata

Authors
Nethravathi, C., Rajamathi, C. R., Rajamathi, M., Gautam, U. K., Wang, X., Golberg, D., & Bando, Y.
Venue
ACS Applied Materials & Interfaces
Published
2013-03-27
Volume
5
Issue
7
Pages
2708-2714
ISSN
  • 1944-8244 (ISSN-L)
  • 1944-8252
OpenAlex
W2329136286
Cited by
179
References
2
FWCI
14.18
Type
journal article
Language
en
Open access
closed

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