Issue 4, 2011
From the journal:

Energy & Environmental Science

Microscale spherical carbon-coated Li4Ti5O12 as ultra high power anode material for lithium batteries†

Hun-Gi Jung,‡ab   Seung-Taek Myung,‡c   Chong Seung Yoon,d   Seoung-Bum Son,a   Kyu Hwan Oh,e   Khalil Amine,*f   Bruno Scrosati*ag  and  Yang-Kook Sun*ab  

* Corresponding authors

a Department of WCU Energy Engineering, Hanyang University, Seoul, Republic of Korea
E-mail: yksun@hanyang.ac.kr
Fax: +82 2 2282 7329
Tel: +82 2 2220 0524

b Department of Chemical Engineering, Hanyang University, Seoul, Republic of Korea

c Department of Chemical Engineering, Iwate University, 4-3-5 Ueda, Morioka, Iwate, Japan

d Department of Material Science and Engineering, Hanyang University, Seoul, Republic of Korea

e Department of Materials Science and Engineering, Seoul National University, Seoul, Republic of Korea

f Electrochemical Technology Program, Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois, USA
E-mail: amine@anl.gov
Fax: +1 630 972 4451
Tel: +1 630 252 3838

g Department of Chemistry, University of Rome “La Sapienza”, Aldo Moro 5, Piazza, Italy
E-mail: bruno.scrosati@uniroma1.it
Fax: +39 06 49 17 69
Tel: +39 06 49 17 69

Abstract

Microscale C-Li4Ti5O12 particles with high tap density were synthesized by a simple solid-state reaction using TiO2, Li2CO3, and pitch. The effect of the carbon content on the physicochemical and electrochemical properties of this material was extensively studied. On calcination of the particles at high temperature in an inert atmosphere, the uniformly coated carbon layer from pitch inhibited the growth of primary particles, maintaining the spherical morphology, similar to the TiO2 precursor in size and shape, and also enabling partial reduction of the starting Ti4+ to Ti3+. Excellent electronic conductivity of the C-coated Li4Ti5O12 resulted from the presence of the highly conducting carbon coating layer and the mixed valence state of Ti3+ and Ti4+. Both the nanoporous morphology and highly conducting carbon coating layer in Li4Ti5O12 particles gave rise to ultra high rate capability.

Graphical abstract: Microscale spherical carbon-coated Li4Ti5O12 as ultra high power anode material for lithium batteries

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Article information

DOI
https://doi.org/10.1039/C0EE00620C
Article type
Paper
Submitted
02 Nov 2010
Accepted
06 Jan 2011
First published
03 Feb 2011

Energy Environ. Sci., 2011,4, 1345-1351

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Microscale spherical carbon-coated Li4Ti5O12 as ultra high power anode material for lithium batteries

H. Jung, S. Myung, C. S. Yoon, S. Son, K. H. Oh, K. Amine, B. Scrosati and Y. Sun, Energy Environ. Sci., 2011, 4, 1345 DOI: 10.1039/C0EE00620C

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