An alternative method to improve the electrochemical performance of a lithium secondary battery with LiMn2O4

Sung Bin Park, Sang Myung Lee, Ho Chul Shin, Won Il Cho, Ho Jang

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The electrochemical properties of the Li-ion battery with a lithium manganese oxide (LiMn2O4) cathode are improved by efficiently reducing the reaction between LiMn2O4 and hydrofluoric acid (HF) produced in the electrolyte. By introducing fine ZrO2 particles in the slurry during fabrication, Mn dissolution of the cathode during the charge-discharge cycles is minimized by scavenging the HF produced in the cell. Results from galvanostatic experiments show that the capacity retention of the LiMn2O4 fabricated with new method is maintained up to 92% after 50 cycles at room temperature and 76% at high temperature without losing initial capacity. The improvement in the electrochemical properties of the cathode prepared by this method is superior to other approaches in terms of fabrication process and it sheds light on the possibility of further improving the electrochemical properties of LiMn2O4.

Original languageEnglish
Pages (from-to)219-225
Number of pages7
JournalJournal of Power Sources
Volume166
Issue number1
DOIs
Publication statusPublished - 2007 Mar 30

Fingerprint

storage batteries
Secondary batteries
lithium batteries
Electrochemical properties
Lithium
Hydrofluoric acid
Cathodes
cathodes
hydrofluoric acid
Hydrofluoric Acid
lithium oxides
Fabrication
cycles
fabrication
Manganese oxide
manganese oxides
Scavenging
scavenging
electric batteries
dissolving

Keywords

  • Capacity retention
  • Hydrofluoric acid
  • Lithium manganese oxide
  • Lithium-ion battery
  • Zirconium oxide particles

ASJC Scopus subject areas

  • Electrochemistry
  • Fuel Technology
  • Materials Chemistry
  • Energy (miscellaneous)

Cite this

An alternative method to improve the electrochemical performance of a lithium secondary battery with LiMn2O4 . / Park, Sung Bin; Lee, Sang Myung; Shin, Ho Chul; Cho, Won Il; Jang, Ho.

In: Journal of Power Sources, Vol. 166, No. 1, 30.03.2007, p. 219-225.

Research output: Contribution to journalArticle

Park, Sung Bin ; Lee, Sang Myung ; Shin, Ho Chul ; Cho, Won Il ; Jang, Ho. / An alternative method to improve the electrochemical performance of a lithium secondary battery with LiMn2O4 In: Journal of Power Sources. 2007 ; Vol. 166, No. 1. pp. 219-225.
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AB - The electrochemical properties of the Li-ion battery with a lithium manganese oxide (LiMn2O4) cathode are improved by efficiently reducing the reaction between LiMn2O4 and hydrofluoric acid (HF) produced in the electrolyte. By introducing fine ZrO2 particles in the slurry during fabrication, Mn dissolution of the cathode during the charge-discharge cycles is minimized by scavenging the HF produced in the cell. Results from galvanostatic experiments show that the capacity retention of the LiMn2O4 fabricated with new method is maintained up to 92% after 50 cycles at room temperature and 76% at high temperature without losing initial capacity. The improvement in the electrochemical properties of the cathode prepared by this method is superior to other approaches in terms of fabrication process and it sheds light on the possibility of further improving the electrochemical properties of LiMn2O4.

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