Enhancement of cyclability of urchin-like rutile TiO 2 submicron spheres by nanopainting with carbon

Kyung Soo Park, Kyung Mi Min, Yun Ho Jin, Seung Deok Seo, Gwang Hee Lee, Hyun Woo Shim, Dong-Wan Kim

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Phase-pure urchin-like rutile TiO 2 (U-TiO 2) submicron (<1 μm) spheres composed of numerous single-crystalline nanorods are successfully synthesized using a surfactant-free wet-chemical route. In addition, a reliable mechanism for the formation of U-TiO 2, different from the well-known "growth-then-assembly" mode, is suggested. To provide a highly electron-conducting network, the U-TiO 2 submicron spheres are nanopainted with a conductive amorphous carbon layer. As anodes for Li-ion batteries, the carbon-coated U-TiO 2 submicron sphere electrodes show enhanced cycling performance, maintaining a reversible capacity of 165.7 mA h g -1 after 100 cycles at a rate of 0.2 C; this is attributed to the provision of an efficient electron-transport path by the conductive carbon.

Original languageEnglish
Pages (from-to)15981-15986
Number of pages6
JournalJournal of Materials Chemistry
Volume22
Issue number31
DOIs
Publication statusPublished - 2012 Aug 21
Externally publishedYes

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Carbon
Amorphous carbon
Nanorods
Anodes
Surface active agents
Surface-Active Agents
Crystalline materials
Electrodes
Electrons
titanium dioxide
Electron Transport
Lithium-ion batteries

ASJC Scopus subject areas

  • Materials Chemistry
  • Chemistry(all)

Cite this

Enhancement of cyclability of urchin-like rutile TiO 2 submicron spheres by nanopainting with carbon. / Park, Kyung Soo; Min, Kyung Mi; Jin, Yun Ho; Seo, Seung Deok; Lee, Gwang Hee; Shim, Hyun Woo; Kim, Dong-Wan.

In: Journal of Materials Chemistry, Vol. 22, No. 31, 21.08.2012, p. 15981-15986.

Research output: Contribution to journalArticle

Park, Kyung Soo ; Min, Kyung Mi ; Jin, Yun Ho ; Seo, Seung Deok ; Lee, Gwang Hee ; Shim, Hyun Woo ; Kim, Dong-Wan. / Enhancement of cyclability of urchin-like rutile TiO 2 submicron spheres by nanopainting with carbon. In: Journal of Materials Chemistry. 2012 ; Vol. 22, No. 31. pp. 15981-15986.
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