Journal
ELECTROCHIMICA ACTA
Volume 94, Issue -, Pages 294-299Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.01.132
Keywords
Lithium titanate; Acetylene black; Multi-wall carbon nano-tubes; High rate performance; Lithium-ion batteries
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Funding
- Special Foundation for Scientific and Technological Innovation of China Harbin Talents [2009RFQXG047]
- Natural Science Foundation of China [50902038]
- National Hi Tech Research and Development Program of China (863 Program) [2012AA110203]
- Education Department of Jilin Province [2010216]
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Li4Ti5O12/AB/MWCNTs material was fabricated through a facile solid-state reaction. The structure and morphology of Li4Ti5O12/AB/MWCNTs material were determined by XRD and SEM. The electrical conductivity of the composite is improved by imbedding Li4Ti5O12 particles into the conductive AB/MWCNTs network. The electrochemical properties of the Li4Ti5O12/AB/MWCNTs composite was measured by charge-discharge tests, cyclic voltammogram (CV) and electrochemical impedance spectroscopy (EIS). Compared with the pristine Li4Ti5O12 sample, Li4Ti5O12/AB/MWCNTs material exhibits an excellent high rate performance and cycling performance, which is due to the decrease of particle size and the increase of electrical conductivity of the material. The discharge capacities were 116 and 102 mAh g(-1) at the charge-discharge rates of 20 and 30 C, respectively. After 1000 cycles at 2 C, the discharge capacity of the composite maintained 163 mAh g(-1). Crown Copyright (C) 2013 Published by Elsevier Ltd. All rights reserved.
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