A vapor-phase carbon-deposition route to efficient inorganic nanosheet-based electrodes
Date
2016
Authors
Lee, J.M.
Kwon, N.H.
Kim, I.Y.
Hwang, S.J.
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Journal article
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Materials Letters, 2016; 179:217-221
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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.
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Data source: Supplementary material, http://www.sciencedirect.com/science/article/pii/S0167577X1630742X#appd002
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Copyright 2016 Elsevier B.V.