Hydrothermal synthesis of Li{sub 4}Ti{sub 5}O{sub 12}/C nanostructured composites: Morphology and electrochemical performance
- Faculty of Physical Chemistry, Belgrade University, Studentski trg 12-16, 11158 Belgrade 118, PAC 105305 (Serbia)
- The Vinča Institute for Nuclear Sciences, Laboratory for Theoretical and Condensed Matter Physics, 11001 Vinča (Serbia)
Graphical abstract: Display Omitted Highlights: ► Nanostructured composite Li{sub 4}Ti{sub 5}O{sub 12}/C was obtained hydrothermally. ► The amount of carbon black influenced significantly the morphology of the composite. ► Rate capability of Li{sub 4}Ti{sub 5}O{sub 12} was improved by the synthesis in presence of carbon black. ► Coulombic capacity of 150 mAh g{sup −1} was obtained at a discharging rate of even 10 C. -- Abstract: Li{sub 4}Ti{sub 5}O{sub 12}/C composites with low (3 wt.%) and high (33 wt.%) carbon black content as well as carbon-free Li{sub 4}Ti{sub 5}O{sub 12} were prepared in two steps under identical conditions: hydrothermal reaction at 130 °C and post-calcination at 400 °C. The X-ray diffraction experiments confirmed the spinel structure of Li{sub 4}Ti{sub 5}O{sub 12} in all samples. The carbon content altered significantly the morphology of obtained micro/nanoparticles. The Li{sub 4}Ti{sub 5}O{sub 12}/C composite with the high carbon content showed the highest electrical conductivity (2.0 S cm{sup −1}), and displayed also extraordinary electrochemical performance: the cyclovoltammograms consisted of well defined reversible redox peaks at a scan rate as high as 10 mV s{sup −1}, while, by galvanostatic cycling, the coulombic capacity of 150 mAh g{sup −1} was evidenced at a discharging rate of 10 C.
- OSTI ID:
- 22215791
- Journal Information:
- Materials Research Bulletin, Vol. 48, Issue 2; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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