Li sub(4)Ti sub(5)O sub(12) modified with Ag nanoparticles as an advanced anode material in lithium-ion batteries
A three-step solid state synthesis was used to produce powders of spinel phase Li sub(4)Ti sub(5)O sub(12) 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 e...
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Veröffentlicht in: | Journal of power sources 2014-01, Vol.245, p.764-771 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | A three-step solid state synthesis was used to produce powders of spinel phase Li sub(4)Ti sub(5)O sub(12) 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 Li sub(4)Ti sub(5)O sub(12)/n-Ag composite powders was examined by chronopotentiometry in three-electrode Swagelok cells. These measurements showed excellent high-rate performance and remarkably good cydability 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. |
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ISSN: | 0378-7753 |