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Lithium-Ion Battery Anode Properties of TiO2 Nanotubes Prepared by the Hydrothermal Synthesis of Mixed (Anatase and Rutile) Particles
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- Authors
- Min Gyu Choi, Young-Gi Lee, Seung-Wan Song, Kwang Man Kim
- Issue Date
- 2010-08
- Citation
- Electrochimica Acta, v.55, no.20, pp.5975-5983
- ISSN
- 0013-4686
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Abstract
- From mixed (anatase and rutile) bulk particles, anatase TiO2 nanotubes are synthesized in this study by an alkaline hydrothermal reaction and a consequent annealing at 300.400°C. The physical and electrochemical properties of the TiO2 nanotube are investigated for use as an anode active material for lithium-ion batteries. Upon the first discharge.charge sweep and simultaneous impedance measurements at local potentials, this study shows that interfacial resistance decreases significantly when passing lithium ions through a solid electrolyte interface layer at the lithium insertion/deinsertion plateaus of 1.75/2.0 V, corresponding to the redox potentials of anatase TiO2 nanotubes. For an anatase TiO2 nanotube containing minor TiO2(B) phase obtained after annealing at 300°C, the high-rate capability can be strongly enhanced by an isotropic dispersion of TiO2 nanotubes to yield a discharge capacity higher than 150mAhg -1, even upon 100 cycles of 10 C-rate discharge.charge operations. This is suitable for use as a high-power anode material for lithium-ion batteries. © 2010 Elsevier Ltd. All rights reserved.
- KSP Keywords
- Anatase and rutile, Anode active material, High power, Hydrothermal reaction, Hydrothermal synthesis, Interfacial resistance, Lithium insertion, Lithium-ion batteries(LIBs), Lithium-ion battery anode, Physical and electrochemical properties, Redox potentials