Reassembled Octatitanate/Carbon-Fiber Composites as High-Rate Lithium Insertion Electrode

Abstract:

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Composites of octatitanate and carbon-fibers were prepared through reassembling tetratitanate nanosheets, synthesized through exfoliation / reassembly process, by the reaction with HCl in colloidal suspension mixed with carbon- fibers, followed by heat treatment. High-rate lithium intercalation properties were examined for the reassembled octatitanate / carbon-fiber composites, and compared with those of reassembled octatitanate simply mixed with carbon-particles. The reversible capacity and the energy efficiency of the reassembled octatitanate / carbon-fiber composites were 190 mAh/g and 94 %, respectively, larger than those of a conventional octatitanate or a reassembled octatitanate. Relatively large capacity of 135 mAh/g still remained at a large current density of 10 A/g, which corresponds to about 70 % of the discharge capacity at a relatively small current density of 100 mA/g. Reassembled octatitanate / carbon- fiber composites exhibited an excellent performance as a high-rate lithium insertion electrode.

Info:

Periodical:

Edited by:

P. VINCENZINI

Pages:

1890-1895

DOI:

10.4028/www.scientific.net/AST.45.1890

Citation:

S. Suzuki and M. Miyayama, "Reassembled Octatitanate/Carbon-Fiber Composites as High-Rate Lithium Insertion Electrode", Advances in Science and Technology, Vol. 45, pp. 1890-1895, 2006

Online since:

October 2006

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$35.00

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