Preparation of Li4Ti5O12 yolk-shell powders by spray pyrolysis and their electrochemical properties

Kwang Min Yang, You Na Ko, Jung Yeul Yun, Yun Chan Kang

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

We have reported for the first time the preparation of yolk-shell- structured Li4Ti5O12 powders for use as anode materials in lithium-ion batteries. One Li4Ti5O 12 yolk-shell-particle powder is directly formed from each droplet containing lithium, titanium, and carbon components inside the hot wall reactor maintained at 900 °C. The precursor Li4Ti5O 12 yolk-shell-particle powders, which are directly prepared by spray pyrolysis, have initial discharge and charge capacities of 155 and 122 mA h g-1, respectively, at a current density of 175 mA g-1. Post-treatment of the yolk-shell-particle powders at temperatures of 700 and 800 °C improves the initial discharge and charge capacities. The initial discharge capacities of the Li4Ti5O12 powders with a yolk-shell structure and a dense structure post-treated at 800 °C are 189 and 168 mA h g-1, respectively. After 100 cycles, the corresponding capacities are 172 and 152 mA h g-1, respectively (retentions of 91 and 90 %).

Original languageEnglish
Pages (from-to)443-446
Number of pages4
JournalChemistry - An Asian Journal
Volume9
Issue number2
DOIs
Publication statusPublished - 2014 Feb 1
Externally publishedYes

Keywords

  • anode materials
  • lithium titanate
  • lithium-ion batteries
  • nanoparticles
  • spray pyrolysis

ASJC Scopus subject areas

  • Chemistry(all)

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