Electrochemical properties of LiNi0.5Mn1.5O4 cathode after Cr doping

Sung Bin Park, Won Sob Eom, Won Il Cho, Ho Jang

Research output: Contribution to journalArticle

73 Citations (Scopus)

Abstract

The structure and electrochemical properties of Cr doped LiNi0.5-xMn1.5CrxO4 cathodes with different Cr contents (x = 0.00, 0.01, 0.03, and 0.05) were investigated by X-ray diffraction, SEM, cyclic voltammetry, charge-discharge tests, and thermogravimetric analysis. In particular, restoration of Li in the cathode during intercalation was carefully analyzed by employing heating-cooling cycles of thermogravimetric technique. Results showed that the initial discharge capacity and capacity retention of the LiNi0.5-xMn1.5CrxO4 cathode were improved as the Cr content was increased. Thermal analysis and CV test results suggested that the improvement of the electrochemical properties of the Cr doped LiNi0.5-xMn1.5CrxO4 cathode was attributed to the high oxygen affinity of the Cr, which reduced oxygen deficiency and improved structural stability of the cathode.

Original languageEnglish
Pages (from-to)679-684
Number of pages6
JournalJournal of Power Sources
Volume159
Issue number1 SPEC. ISS.
DOIs
Publication statusPublished - 2006 Sep 13

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Electrochemical properties
Cathodes
cathodes
Doping (additives)
Oxygen
hypoxia
structural stability
Intercalation
intercalation
restoration
Thermoanalysis
Restoration
Cyclic voltammetry
affinity
Thermogravimetric analysis
thermal analysis
Cooling
cooling
Heating
X ray diffraction

Keywords

  • Chromium
  • Doping
  • LiNiMnO
  • Lithium-ion batteries

ASJC Scopus subject areas

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

Cite this

Electrochemical properties of LiNi0.5Mn1.5O4 cathode after Cr doping. / Park, Sung Bin; Eom, Won Sob; Cho, Won Il; Jang, Ho.

In: Journal of Power Sources, Vol. 159, No. 1 SPEC. ISS., 13.09.2006, p. 679-684.

Research output: Contribution to journalArticle

Park, Sung Bin ; Eom, Won Sob ; Cho, Won Il ; Jang, Ho. / Electrochemical properties of LiNi0.5Mn1.5O4 cathode after Cr doping. In: Journal of Power Sources. 2006 ; Vol. 159, No. 1 SPEC. ISS. pp. 679-684.
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