Facile synthesis of nano-Li4Ti5O12 for high-rate Li-ion battery anodes

Yun Ho Jin, Kyung Mi Min, Hyun Woo Shim, Seung Deok Seo, In Sung Hwang, Kyung Soo Park, Dong Wan Kim

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

One of the most promising anode materials for Li-ion batteries, Li4Ti5O12, has attracted attention because it is a zero-strain Li insertion host having a stable insertion potential. In this study, we suggest two different synthetic processes to prepare Li4Ti5O12 using anatase TiO2 nanoprecursors. TiO2 powders, which have extraordinarily large surface areas of more than 250 m2 g-1, were initially prepared through the urea-forced hydrolysis/precipitation route below 100°C. For the synthesis of Li4Ti5O12, LiOH and Li2CO3 were added to TiO2 solutions prepared in water and ethanol media, respectively. The powders were subsequently dried and calcined at various temperatures. The phase and morphological transitions from TiO2 to Li4Ti5O12 were characterized using X-ray powder diffraction and transmission electron microscopy. The electrochemical performance of nanosized Li4Ti5O12 was evaluated in detail by cyclic voltammetry and galvanostatic cycling. Furthermore, the high-rate performance and long-term cycle stability of Li4Ti5O12 anodes for use in Li-ion batteries were discussed.

Original languageEnglish
Article number10
JournalNanoscale Research Letters
Volume7
DOIs
Publication statusPublished - 2012

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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