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Synthesis, Structure, and Electrochemical Properties of Li4Ti5O12

Published online by Cambridge University Press:  26 February 2011

Chintalapalle V Ramana ,
Satoshi Utsunomiya ,
Rodney C Ewing ,
Udo Becker ,
Karim Zaghib  and
Christian M Julien
Chintalapalle V Ramana
Affiliation:
ramanacv@umich.edu, University of Michigan, Geological Sciences, 1100 N. Univ. Ave., CC Little,, Ann Arbor, MI, 48109, United States, 7347635344, 7347634690
Satoshi Utsunomiya
Affiliation:
utu@umich.edu, University of Michigan, Geological Sciences, 1100 N. Univ. Ave., CC Little, Ann Arbor, MI, 48109, United States
Rodney C Ewing
Affiliation:
rodewing@umich.edu, University of Michigan, Geological Sciences, 1100 N. Univ. Ave., CC Little, Ann Arbor, MI, 48109, United States
Udo Becker
Affiliation:
ubecker@umich.edu, University of Michigan, Geological Sciences, 1100 N. Univ. Ave., CC Little, Ann Arbor, MI, 48109, United States
Karim Zaghib
Affiliation:
zaghib.karim@ireq.ca, Institut de Recherches d'Hydro-Québec, Chemical and Environmental Technologies, 1800 Boul. Lionel-Boulet, Varennes, Quebec, J3X 1S1, Canada
Christian M Julien
Affiliation:
cjul@ccr.jussieu.fr, Université Pierre et Marie Curie, Institut des Nano-Sciences de Paris, Campus Boucicaut, 140 rue de Lourmel, Paris, 75015, France
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Abstract

Lithium titanium oxide (Li4Ti5O12) spinels are promising negative electrode materials for application in energy technology. In this work, we have synthesized Li4Ti5O12 and investigated its structure, electronic properties, and electrochemical features using several analytical spectroscopy and microscopy techniques. The equally spaced lattice fringes obtained using by the high-resolution transmission electron microscopy (HRTEM) along with electron diffraction reveal that the grown Li4Ti5O12 is well crystallized in the spinel structure without any indication of crystallographic defects such as dislocations or misfits. The electronic structure determination using high-resolution X-ray photoelectron spectroscopy (XPS) coupled with compositional studies using energy dispersive X-ray spectrometry (EDS) indicate excellent chemical quality of the Li4Ti5O12. Under the optimal synthetic condition, the sample delivers a discharge capacity of 161 mAh/g at C/12. The good cyclability of Li4Ti5O12 is attributed to the small expansion (δV≈1%) of the elementary unit-cell.

Keywords

energy-storagetransmission electron microscopy (TEM)microstructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 973: Symposium BB – Mobile Energy , 2006 , 0973-BB05-09
Copyright
Copyright © Materials Research Society 2007

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References

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