Journal
JOURNAL OF POWER SOURCES
Volume 245, Issue -, Pages 764-771Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2013.07.048
Keywords
Li4Ti5O12; Silver nanoparticles; Li-ion battery; Anode; Solid-state synthesis
Funding
- National Science Centre (NCN) [DEC-2011/03/N/ST5/04389]
- Mazovia Voivodeship Office
- Foundation for Polish Science International PhD Projects Programme
- EU European Regional Development Fund
- US Department of Energy EPSCoR Program
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A three-step solid state synthesis was used to produce powders of spinel phase Li4Ti5O12 with crystallite size in a few hundred nanometers range. This was followed by surface modification through the deposition of 2-10 nm Ag nanoparticles, as verified by scanning and transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and Raman spectroscopy. The electrochemical performance of these Li4Ti5O12/n-Ag composite powders was examined by chronopotentiometry in three-electrode Swagelok cells. These measurements showed excellent high-rate performance and remarkably good cyclability of the fabricated powders. Specifically, capacity retention in excess of 86% after raising the discharge current from 1C to 10C and less than 6% of capacity loss after 50 charge/discharge cycles at 1C current rate were measured. (C) 2013 Elsevier B.V. All rights reserved.
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