Electrochemical and thermal investigation of Li4/3 Ti 5/3O4 spinel

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

Research output: Contribution to journalArticle

85 Citations (Scopus)

Abstract

We have studied the electrochemical and thermal properties of Li43 Ti53 O4 spinel as a promising anode material for lithium ion batteries. The spinel/rock-salt two-phase transition process was interpreted using a core-shell model, which provided a good explanation of the different area-specific impedance behaviors during the charge and discharge processes. The constant dE/dT during the spinel/rock-salt phase transition was calculated from the heat-flow profile by isothermal microcalorimeter results and found to be around -0.04 mVK. This very low and constant entropy change indicates that Li43 Ti53 O4 is a good anode material in terms of thermal stability. Also, we propose that there is a new phase generation when more than one lithium atom is inserted into Li43 Ti53 O4. According to the discontinuity of dE/dT results, the order/disorder transition at the low-voltage region (around 0.6 V vs Li) occurs during further lithium insertion.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume154
Issue number2
DOIs
Publication statusPublished - 19 Jan 2007
Externally publishedYes

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spinel
Anodes
Lithium
halites
lithium
Phase transitions
Rocks
Salts
Order disorder transitions
anodes
Electrochemical properties
Thermodynamic stability
Entropy
Thermodynamic properties
Heat transfer
heat transmission
Atoms
low voltage
calorimeters
electric batteries

ASJC Scopus subject areas

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Electrochemical and thermal investigation of Li4/3 Ti 5/3O4 spinel. / Lu, W.; Belharouak, I.; Liu, J.; Amine, K.

In: Journal of the Electrochemical Society, Vol. 154, No. 2, 19.01.2007.

Research output: Contribution to journalArticle

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