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A vapor-phase carbon-deposition route to efficient inorganic nanosheet-based electrodes

Title
A vapor-phase carbon-deposition route to efficient inorganic nanosheet-based electrodes
Authors
Lee J.M.Kwon N.H.Kim I.Y.Hwang S.-J.
Ewha Authors
황성주
SCOPUS Author ID
황성주scopus
Issue Date
2016
Journal Title
Materials Letters
ISSN
0167-577XJCR Link
Citation
vol. 179, pp. 217 - 221
Keywords
Anode materialsCarbon depositionInorganic nanosheetsLithium ion batteriesNanosize
Publisher
Elsevier
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Efficient inorganic nanosheet-based electrode materials can be synthesized by the calcination of exfoliated Ti5NbO14 nanosheets under C2H2 flow. While the calcination in Ar atmosphere causes a phase transformation from layered Ti5NbO14 to TiO2 and Nb2O5, employing C2H2 atmosphere leads to the maintenance of the original layered structure of Ti5NbO14 upon the heat-treatment, which is attributable to the stabilization of layered lattice by surface passivation by deposited carbon layer. The resulting carbon@titanoniobate materials show mesoporous house-of-cards-type stacking structure of 2D nanosheets. This carbon@titanoniobate material delivers large discharge capacity of ~320 mA h g−1 with excellent cyclability and rate performance, which is much superior to that of carbon-free homologue. The present study clearly demonstrates that the heat-treatment under C2H2 flow provides a simple and effective route to high-performance inorganic nanosheet-based electrode materials. © 2016 Elsevier B.V.
DOI
10.1016/j.matlet.2016.05.021
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자연과학대학 > 화학·나노과학전공 > Journal papers
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