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Single-Crystalline Bilayered V2O5 Nanobelts for High-Capacity Sodium-Ion Batteries

Su, Dawei, Wang, Guoxiu·2013·ACS Nano

Abstract

Single-crystalline bilayered vanadium oxide nanobelts were synthesized by a simple solvothermal method. FESEM and AFM analyses identified the nanobelt morphology of the as-prepared vanadium oxide with a rectangular cross-section and a thickness of approximately 50 nm. XRD and TEM characterizations revealed the presence of a large (001) interlayer spacing (∼11.53 Å), which can accommodate Na-ion insertion and extraction. When applied as cathode materials in Na-ion batteries, vanadium oxide nanobelts exhibited a high capacity of 231.4 mA h g(-1) at a current density of 80 mA g(-1). This corresponds to the theoretical capacity to form Na2V2O5 on Na-ion insertion. Vanadium oxide nanobelts also demonstrated an excellent high-rate performance and a satisfactory cyclability. These superior electrochemical performances could be ascribed to the unique bilayered vanadium oxide nanobelts with dominantly exposed {100} crystal planes, which provide large interlayer spacing for facile Na-ion insertion/extraction. Single-crystalline bilayered vanadium oxide nanobelts could be promising cathode materials for high-performance Na-ion batteries.

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Authors
Su, D., & Wang, G.
Venue
ACS Nano
Published
2013-11-14
Volume
7
Issue
12
Pages
11218-11226
ISSN
  • 1936-0851 (ISSN-L)
  • 1936-086X
OpenAlex
W2048417951
Cited by
345
References
0
FWCI
18.97
Type
journal article
Language
en
Open access
closed

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