Tailoring oriented TiO2 nanotube morphology for improved Li storage kinetics

Title
Tailoring oriented TiO2 nanotube morphology for improved Li storage kinetics
Authors
Jae-Hun KimKai Zhu김진영Arthur J. Frank
Keywords
TiO2; Nanotube; Anodization; Li storage kinetics; Li-ion battery
Issue Date
2013-01
Publisher
Electrochimica acta
Citation
VOL 88, 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 °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.
URI
http://pubs.kist.re.kr/handle/201004/44445
ISSN
00134686
Appears in Collections:
KIST Publication > Article
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