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

Journal Article · Mon Jan 01 04:00:00 EST 2007 · J. Electrochem. Soc.

DOI:https://doi.org/10.1149/1.2402117· OSTI ID:935913

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

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.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: EE
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 935913
• Report Number(s): ANL/CMT/JA-57039
• Journal Information: J. Electrochem. Soc., Journal Name: J. Electrochem. Soc. Journal Issue: 2 ; 2007 Vol. 154; ISSN JESOAN; ISSN 0013-4651
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ANODES
ATOMS
ENTROPY
HEAT FLUX
IMPEDANCE
LITHIUM
LITHIUM IONS
SPINELS
STABILITY
THERMODYNAMIC PROPERTIES