Improved electrode performance of LiAlyCo1-yO2 prepared via sol-gel process

Won Sub Yoon, Kyung Keun Lee, Kwang Bum Kim

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

A significant improvement in capacity and cyclability of Al-doped LiCoO2 cathode has been achieved by sol-gel process using acrylic acid as a chelating agent. The structure and electrochemical properties of the Al-doped LiCoO2 powders at various calcination temperatures were investigated. The X-ray diffraction pattern for the Al-doped LiCoO2 powders calcined at 600°C or above shows that these materials are a well-developed, layered HT-LiCoO2 structures. The capacity fading of the Al-doped LiCoO2 electrodes greatly reduced as the calcination temperature decreased. The sol-gel process makes possible the synthesis of Al-doped LiCoO2 with α-NaFeO2 structure at lower temperatures than solid-state synthesis, and thereby the enhancement of the capacity and cyclability of Al-doped LiCoO2 electrode.

Original languageEnglish
JournalElectrochemical and Solid-State Letters
Volume4
Issue number4
DOIs
Publication statusPublished - 2001 Apr 1

Fingerprint

sol-gel processes
Sol-gel process
Powders
Calcination
roasting
Electrodes
electrodes
acrylic acid
fading
synthesis
Chelating Agents
Chelation
Electrochemical properties
Temperature
Diffraction patterns
Acrylics
Cathodes
diffraction patterns
cathodes
solid state

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering

Cite this

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abstract = "A significant improvement in capacity and cyclability of Al-doped LiCoO2 cathode has been achieved by sol-gel process using acrylic acid as a chelating agent. The structure and electrochemical properties of the Al-doped LiCoO2 powders at various calcination temperatures were investigated. The X-ray diffraction pattern for the Al-doped LiCoO2 powders calcined at 600°C or above shows that these materials are a well-developed, layered HT-LiCoO2 structures. The capacity fading of the Al-doped LiCoO2 electrodes greatly reduced as the calcination temperature decreased. The sol-gel process makes possible the synthesis of Al-doped LiCoO2 with α-NaFeO2 structure at lower temperatures than solid-state synthesis, and thereby the enhancement of the capacity and cyclability of Al-doped LiCoO2 electrode.",
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Improved electrode performance of LiAlyCo1-yO2 prepared via sol-gel process. / Yoon, Won Sub; Lee, Kyung Keun; Kim, Kwang Bum.

In: Electrochemical and Solid-State Letters, Vol. 4, No. 4, 01.04.2001.

Research output: Contribution to journalArticle

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AB - A significant improvement in capacity and cyclability of Al-doped LiCoO2 cathode has been achieved by sol-gel process using acrylic acid as a chelating agent. The structure and electrochemical properties of the Al-doped LiCoO2 powders at various calcination temperatures were investigated. The X-ray diffraction pattern for the Al-doped LiCoO2 powders calcined at 600°C or above shows that these materials are a well-developed, layered HT-LiCoO2 structures. The capacity fading of the Al-doped LiCoO2 electrodes greatly reduced as the calcination temperature decreased. The sol-gel process makes possible the synthesis of Al-doped LiCoO2 with α-NaFeO2 structure at lower temperatures than solid-state synthesis, and thereby the enhancement of the capacity and cyclability of Al-doped LiCoO2 electrode.

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