Journal
ELECTROCHIMICA ACTA
Volume 53, Issue 22, Pages 6351-6355Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2008.04.048
Keywords
lithium-ion batteries; carbon nanotubes; TiO2; cycling performance; AC impedance
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Carbon nanotubes (CNTs) loaded with Ag and Ti02 nanoparticles (Ag-Ti02/CNTs) are a composite showing promise as an anode material in lithium-ion batteries. Here we prepare Ag-Ti02/CNTs via hydrolysis and reduction processes. The morphology, structure, and electrochemical performance of the composite were investigated by transmission electron microscopy, X-ray diffraction, and a variety of electrochemical techniques. The results show that the Ti02 and Ag nanoparticles were uniformly deposited on the surface of CNTs with crystallite sizes of -12 and 30 nm, respectively. The Ag-Ti02/CNTs anode materials showed superior cycling stability and a high reversible capacity of 172 mAh/g after 30 cycles. Ag addition not only increases the electronic conductivity of the composites, but also allows convenient transfer of Li-ion in the composite structure. (c) 2008 Elsevier Ltd. All rights reserved.
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