Effects of preparation conditions on the electrochemical and morphological characteristics of Li4Ti5O12 powders prepared by spray pyrolysis

Seo Hee Ju, Yun Chan Kang

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Li4Ti5O12 anode powders were prepared by post-treatment of the precursor powders obtained by spray pyrolysis at various preparation conditions. The precursor powders had fine size, narrow size distribution, dense inner structure and homogeneous composition when the flow rate of the carrier gas and the preparation temperature were 10 l min-1 and 800 °C. The spherical shapes of the precursor powders obtained at the optimum preparation conditions maintained after post-treatment at a temperature of 800 °C. The mean sizes of the Li4Ti5O12 powders were controlled by changing the concentrations of the spray solution. The initial discharge capacities and cycle properties of the Li4Ti5O12 powders were strongly affected by the preparation temperatures of the precursor powders. The optimum preparation temperature of the precursor powders was 800 °C when the flow rate of the carrier gas was 10 l min-1. The discharge capacities and cycle properties of the Li4Ti5O12 powders were not affected by flow rates of the carrier gas. The Li4Ti5O12 powders had good cycle properties irrespective of the concentrations of the spray solution. However, the Li4Ti5O12 powders obtained from the spray solutions with high concentration above 0.5 M had high discharge capacities than those obtained from the spray solutions with low concentration below 0.1 M.

Original languageEnglish
Pages (from-to)185-190
Number of pages6
JournalJournal of Power Sources
Volume189
Issue number1
DOIs
Publication statusPublished - 2009 Apr 1
Externally publishedYes

Fingerprint

Spray pyrolysis
Powders
pyrolysis
sprayers
preparation
Discharge (fluid mechanics)
flow velocity
Gases
Flow rate
cycles
gases
Temperature
temperature
low concentrations
Anodes
anodes

Keywords

  • Anode materials
  • Lithium secondary battery
  • Lithium titanate
  • Spray pyrolysis

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Physical and Theoretical Chemistry

Cite this

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abstract = "Li4Ti5O12 anode powders were prepared by post-treatment of the precursor powders obtained by spray pyrolysis at various preparation conditions. The precursor powders had fine size, narrow size distribution, dense inner structure and homogeneous composition when the flow rate of the carrier gas and the preparation temperature were 10 l min-1 and 800 °C. The spherical shapes of the precursor powders obtained at the optimum preparation conditions maintained after post-treatment at a temperature of 800 °C. The mean sizes of the Li4Ti5O12 powders were controlled by changing the concentrations of the spray solution. The initial discharge capacities and cycle properties of the Li4Ti5O12 powders were strongly affected by the preparation temperatures of the precursor powders. The optimum preparation temperature of the precursor powders was 800 °C when the flow rate of the carrier gas was 10 l min-1. The discharge capacities and cycle properties of the Li4Ti5O12 powders were not affected by flow rates of the carrier gas. The Li4Ti5O12 powders had good cycle properties irrespective of the concentrations of the spray solution. However, the Li4Ti5O12 powders obtained from the spray solutions with high concentration above 0.5 M had high discharge capacities than those obtained from the spray solutions with low concentration below 0.1 M.",
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AU - Ju, Seo Hee

AU - Kang, Yun Chan

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AB - Li4Ti5O12 anode powders were prepared by post-treatment of the precursor powders obtained by spray pyrolysis at various preparation conditions. The precursor powders had fine size, narrow size distribution, dense inner structure and homogeneous composition when the flow rate of the carrier gas and the preparation temperature were 10 l min-1 and 800 °C. The spherical shapes of the precursor powders obtained at the optimum preparation conditions maintained after post-treatment at a temperature of 800 °C. The mean sizes of the Li4Ti5O12 powders were controlled by changing the concentrations of the spray solution. The initial discharge capacities and cycle properties of the Li4Ti5O12 powders were strongly affected by the preparation temperatures of the precursor powders. The optimum preparation temperature of the precursor powders was 800 °C when the flow rate of the carrier gas was 10 l min-1. The discharge capacities and cycle properties of the Li4Ti5O12 powders were not affected by flow rates of the carrier gas. The Li4Ti5O12 powders had good cycle properties irrespective of the concentrations of the spray solution. However, the Li4Ti5O12 powders obtained from the spray solutions with high concentration above 0.5 M had high discharge capacities than those obtained from the spray solutions with low concentration below 0.1 M.

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