Tailoring oriented TiO2 nanotube morphology for improved Li storage kinetics

Authors
Kim, Jae-HunZhu, KaiKim, Jin YoungFrank, Arthur J.
Issue Date
2013-01-15
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
ELECTROCHIMICA ACTA, v.88, pp.123 - 128
Abstract
We report on the syntheses of oriented TiO2 nanotube (NT) arrays having different geometries and the electrochemical properties as electrodes for lithium rechargeable batteries. The morphology of the NT arrays, which were prepared by electrochemical anodization of Ti foil, is investigated by scanning electron microscopy. X-ray diffraction analysis indicates that annealing the as-grown NT films at a temperature of 400 degrees C transforms them from an amorphous phase to anatase TiO2. Analyses of cyclic voltammograms indicate that there is significant capacitive Li+ storage associated with the NT surface in addition to the Li+ storage within the bulk material. The NT morphological parameters (e.g. pore diameter, wall thickness, and roughness factor) are found to have significant effects on the Li-ion insertion/extraction kinetics and the performance of the electrodes in lithium-ion batteries. (C) 2012 Elsevier Ltd. All rights reserved.
Keywords
LITHIUM INSERTION; ENERGY-STORAGE; ANATASE TIO2; ELECTRODE; INTERCALATION; PERFORMANCE; ARRAYS; SIZE; LITHIUM INSERTION; ENERGY-STORAGE; ANATASE TIO2; ELECTRODE; INTERCALATION; PERFORMANCE; ARRAYS; SIZE; TiO2; Nanotube; Anodization; Li storage kinetics; Li-ion battery
ISSN
0013-4686
URI
https://pubs.kist.re.kr/handle/201004/128452
DOI
10.1016/j.electacta.2012.10.013
Appears in Collections:
KIST Article > 2013
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