Journal
ELECTROCHIMICA ACTA
Volume 55, Issue 22, Pages 6596-6600Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2010.06.015
Keywords
Sawtooth-like Li4Ti5O12; Layered hydrous lithium titanate; Nanosheet; Hierarchical microsphere; Lithium-ion battery
Categories
Funding
- National Key Project of China for Basic Research [2006CB202600]
- National High Technology Research and Development Program of China [2007AA032222]
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Hierarchical layered hydrous lithium titanate and Li4Ti5O12 microspheres assembled by nanosheets have been successfully synthesized via a hydrothermal process and subsequent thermal treatment. The electrochemical properties of the two samples have been investigated by galvanostatic methods. The former, with the obvious layered structure and a large surface area, delivers a reversible capacity of 180 mAhg(-1) after 200 cycles at 200 mAg(-1). As for Li4Ti5O12, with the intriguing and unique sawtooth-like morphology, it presents exceptional high rate performance and excellent cycling stability. Up to 132 mAhg(-1) is obtained after 200 cycles at 10,000 mAg(-1) (57 C), proving itself promising for high-rate applications. (C) 2010 Elsevier Ltd. All rights reserved.
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