Tailoring high-surface-area nanocrystalline TiO2 polymorphs for high-power Li ion battery electrodes

Yun Ho Jin, Seung Hun Lee, Hyun Woo Shim, Kyung Hyun Ko, Dong Wan Kim

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The crystallization and morphology of brookite and anatase titania (TiO2) were controlled using the urea-mediated hydrolysis/ precipitation route in the presence of the Ti3+ ions. Without the strong complexing agents and the non-hydrothermal conditions, simple alterations to the urea concentration led to the synthesis from brookite nanorods to anatase nanoflowers at a low temperature below 100 °C, whereas the BET specific surface area evolved from 102 to 268 m2 g-1, respectively. A possible formation mechanism was also proposed for these TiO2 nanostructures. The excellent reversible capacity and rate capability were achieved for the anatase nanoflowers because of the small crystallite size and significantly large surface area.

Original languageEnglish
Pages (from-to)7315-7321
Number of pages7
JournalElectrochimica Acta
Volume55
Issue number24
DOIs
Publication statusPublished - 2010 Oct 1
Externally publishedYes

Keywords

  • Anatase
  • Li-ion batteries
  • Nanostructures
  • Rate capability
  • TiO

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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