Journal
ELECTROCHIMICA ACTA
Volume 156, Issue -, Pages 38-44Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.12.117
Keywords
Li4Ti5O12; nanaowires; carbon-coating; anode materials; Li-ion batteries
Categories
Funding
- State Key Basic Research Program of PRC [2011CB935903]
- National High Technology Research and Development Program(863 Program) of China [2013AA050902]
- Shanghai Science Technology Committee [13JC1407900]
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Nanostructured Li4Ti5O12 is always synthesized under relatively low temperature to prevent crystal growth, however, low-temperature treatment leads to low crystallinity. In this work, we use a chemical vapor deposition strategy to synthesis uniformly carbon layer coated Li4Ti5O12 nanowire. This method allows calcining Li4Ti5O12 nanowire under high temperature to obtain high crystallinity of Li4Ti5O12 without destroying its morphology. The Li4Ti5O12 displays excellent rate capacity. Also, the carbon coated layer could protect the Li4Ti5O12 surface from side reaction with electrolyte. The carbon coated Li4Ti5O12 nanowire shows excellent capacity retention during charge/discharge under elevated temperature of 55 degrees C due to high crystallinity and reduced side-reaction. (C) 2015 Elsevier Ltd. All rights reserved.
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