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Synthesis and Electrochemical Properties of Hollandite-Type KXTiO2

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Abstract:

Single phase specimen of K0.12TiO2 with hollandite-type structure was successfully synthesized by the solid-state reaction under Ar/H2 atomosphere. K+ ions were partially extracted from the parent K0.12TiO2 specimen by the HCl treatment. The K+-extracted K0.08TiO2 specimen worked as a rechargeable electrode material. An initial capacity of 92 mAh/g (cut-off voltage: 1.0 V) could be achieved, which approximately correspond to the composition Li0.28TiO2. A reversible capacity after 50 cycles was about 50 mAh/g.

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Periodical:

Key Engineering Materials (Volume 485)

Pages:

123-126

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.485.123

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Online since:

July 2011

Authors:

Mitsumasa Sakao, Norihito Kijima, Kunimitsu Kataoka, Junji Akimoto, Takeshi Okutani

Keywords:

Charge-Discharge Property, Hollandite-Type Structure, TiO2, Tunnel Structure

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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