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

Jang Mee Lee, Nam Hee Kwon, In Young Kim, Seong Ju Hwang

Research output: Contribution to journalArticle

1 Citation (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.

Original languageEnglish
Pages (from-to)217-221
Number of pages5
JournalMaterials Letters
Volume179
DOIs
Publication statusPublished - 2016 Sep 15

Fingerprint

Nanosheets
Carbon
Vapors
routes
vapor phases
Electrodes
electrodes
carbon
electrode materials
Calcination
roasting
heat treatment
Heat treatment
atmospheres
Mesoporous materials
Passivation
passivity
maintenance
phase transformations
Stabilization

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Lee, Jang Mee ; Kwon, Nam Hee ; Kim, In Young ; Hwang, Seong Ju. / A vapor-phase carbon-deposition route to efficient inorganic nanosheet-based electrodes. In: Materials Letters. 2016 ; Vol. 179. pp. 217-221.
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A vapor-phase carbon-deposition route to efficient inorganic nanosheet-based electrodes. / Lee, Jang Mee; Kwon, Nam Hee; Kim, In Young; Hwang, Seong Ju.

In: Materials Letters, Vol. 179, 15.09.2016, p. 217-221.

Research output: Contribution to journalArticle

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AB - 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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