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Title: Electrochemical and thermal investigation of Li{sub 3}Ti{sub 5/3}O{sub 4} spinel.

Abstract

We have studied the electrochemical and thermal properties of Li{sub 4/3}T{sub 5/3}O{sub 4} 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 mV/K. This very low and constant entropy change indicates that Li{sub 4/3}T{sub 5/3}O{sub 4} 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 Li{sub 4/3}T{sub 5/3}O{sub 4}. 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.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
EE
OSTI Identifier:
935913
Report Number(s):
ANL/CMT/JA-57039
Journal ID: ISSN 0013-4651; JESOAN; TRN: US0804763
DOE Contract Number:
DE-AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: J. Electrochem. Soc.; Journal Volume: 154; Journal Issue: 2 ; 2007
Country of Publication:
United States
Language:
ENGLISH
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ANODES; ATOMS; ENTROPY; HEAT FLUX; IMPEDANCE; LITHIUM; LITHIUM IONS; SPINELS; STABILITY; THERMODYNAMIC PROPERTIES

Citation Formats

Lu, W., Belharouak, I., Liu, J., Amine, K., and Chemical Engineering. Electrochemical and thermal investigation of Li{sub 3}Ti{sub 5/3}O{sub 4} spinel.. United States: N. p., 2007. Web. doi:10.1149/1.2402117.
Lu, W., Belharouak, I., Liu, J., Amine, K., & Chemical Engineering. Electrochemical and thermal investigation of Li{sub 3}Ti{sub 5/3}O{sub 4} spinel.. United States. doi:10.1149/1.2402117.
Lu, W., Belharouak, I., Liu, J., Amine, K., and Chemical Engineering. Mon . "Electrochemical and thermal investigation of Li{sub 3}Ti{sub 5/3}O{sub 4} spinel.". United States. doi:10.1149/1.2402117.
@article{osti_935913,
title = {Electrochemical and thermal investigation of Li{sub 3}Ti{sub 5/3}O{sub 4} spinel.},
author = {Lu, W. and Belharouak, I. and Liu, J. and Amine, K. and Chemical Engineering},
abstractNote = {We have studied the electrochemical and thermal properties of Li{sub 4/3}T{sub 5/3}O{sub 4} 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 mV/K. This very low and constant entropy change indicates that Li{sub 4/3}T{sub 5/3}O{sub 4} 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 Li{sub 4/3}T{sub 5/3}O{sub 4}. 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.},
doi = {10.1149/1.2402117},
journal = {J. Electrochem. Soc.},
number = 2 ; 2007,
volume = 154,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}