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Materials 2013, 6(6), 2285-2294; doi:10.3390/ma6062285
Article

Synthesis of Li2Ti3O7 Anode Materials by Ultrasonic Spray Pyrolysis and Their Electrochemical Properties

*  and
Graduate School of Material Science and Engineering, University of Fukui, 3-9-1 Bunkyo, Fukui 910-8507, Japan
* Author to whom correspondence should be addressed.
Received: 26 April 2013 / Revised: 24 May 2013 / Accepted: 28 May 2013 / Published: 3 June 2013
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Abstract

Ramsdellite-type lithium titanate (Li2Ti3O7) powders were synthesized by performing ultrasonic spray pyrolysis, and their chemical and physical properties were characterized by performing Scanning Electron Microscope (SEM), powder X-ray Diffraction (XRD), and Inductively Coupled Plasma (ICP) analyses. The as-prepared Li2Ti3O7 precursor powders had spherical morphologies with hollow microstructures, but an irregularly shaped morphology was obtained after calcination above 900 °C. The ramsdellite Li2Ti3O7 crystal phase was obtained after the calcination at 1100 °C under an argon/hydrogen atmosphere. The first rechargeable capacity of the Li2Ti3O7 anode material was 168 mAh/g at 0.1 C and 82 mAh/g at 20 C, and the discharge capacity retention ratio was 99% at 1 C after the 500th cycle. The cycle performance of the Li2Ti3O7 anode was also highly stable at 50 °C, demonstrating the superiority of Li2Ti3O7 anode materials reported previously.
Keywords: spray pyrolysis; lithium ion battery; powders; anode; oxide spray pyrolysis; lithium ion battery; powders; anode; oxide
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Ogihara, T.; Kodera, T. Synthesis of Li2Ti3O7 Anode Materials by Ultrasonic Spray Pyrolysis and Their Electrochemical Properties. Materials 2013, 6, 2285-2294.

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