Thermal properties of Li4/3Ti5/3O4/LiMn2O4 cell

W. Lu, I. Belharouak, J. Liu, K. Amine

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

The thermal properties of Li4/3Ti5/3O4 and Li1+xMn2O4 electrodes were investigated by isothermal micro-calorimetry (IMC). The 150-mAh g-1 capacity of a Li/Li4/3Ti5/3O4 half cell was obtained through the voltage plateau that occurs at 1.55 V during the phase transition from spinel to rock salt. Extra capacity below 1.0 V was attributed to the generation of a new phase. The small and constant entropy change of Li4/3Ti5/3O4 during the spinel/rock-salt phase transition indicated its good thermal stability. Accelerated rate calorimetry confirmed that Li4/3Ti5/3O4 has better thermal characteristics than graphite. The IMC results for a Li/Li1+xMn2O4 half cell indicated less heat variation due to the suppression of the order/disorder change by lithium doping. The heat profiles of the Li4/3Ti5/3O4/Li1+xMn2O4 full cell indicated less heat generation compared with a mesocarbon-microbead graphite/Li1+xMn2O4 cell.

Original languageEnglish
Pages (from-to)673-677
Number of pages5
JournalJournal of Power Sources
Volume174
Issue number2
DOIs
Publication statusPublished - 6 Dec 2007
Externally publishedYes

Fingerprint

Calorimetry
Thermodynamic properties
Graphite
thermodynamic properties
halites
heat measurement
Salts
Phase transitions
cells
Rocks
spinel
Order disorder transitions
graphite
Heat generation
Lithium
heat
heat generation
Thermodynamic stability
Entropy
Doping (additives)

Keywords

  • Entropy change
  • Lithium manganese spinel
  • Lithium titanate spinel
  • Thermal safety

ASJC Scopus subject areas

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

Cite this

Thermal properties of Li4/3Ti5/3O4/LiMn2O4 cell. / Lu, W.; Belharouak, I.; Liu, J.; Amine, K.

In: Journal of Power Sources, Vol. 174, No. 2, 06.12.2007, p. 673-677.

Research output: Contribution to journalArticle

Lu, W. ; Belharouak, I. ; Liu, J. ; Amine, K. / Thermal properties of Li4/3Ti5/3O4/LiMn2O4 cell. In: Journal of Power Sources. 2007 ; Vol. 174, No. 2. pp. 673-677.
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AB - The thermal properties of Li4/3Ti5/3O4 and Li1+xMn2O4 electrodes were investigated by isothermal micro-calorimetry (IMC). The 150-mAh g-1 capacity of a Li/Li4/3Ti5/3O4 half cell was obtained through the voltage plateau that occurs at 1.55 V during the phase transition from spinel to rock salt. Extra capacity below 1.0 V was attributed to the generation of a new phase. The small and constant entropy change of Li4/3Ti5/3O4 during the spinel/rock-salt phase transition indicated its good thermal stability. Accelerated rate calorimetry confirmed that Li4/3Ti5/3O4 has better thermal characteristics than graphite. The IMC results for a Li/Li1+xMn2O4 half cell indicated less heat variation due to the suppression of the order/disorder change by lithium doping. The heat profiles of the Li4/3Ti5/3O4/Li1+xMn2O4 full cell indicated less heat generation compared with a mesocarbon-microbead graphite/Li1+xMn2O4 cell.

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