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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
Research Interests
  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis

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High Electrochemical Li Intercalation in Titanate Nanotubes

Cited 12 times inthomson ciCited 10 times inthomson ci
Title
High Electrochemical Li Intercalation in Titanate Nanotubes
Other Titles
High Electrochemical Li Intercalation in Titanate Nanotubes
Author
Kim, Dong HyunJang, Jum SukHan, Sang SooLee, Ki SooChoi, Sun HeeUmar, AhmadLee, Jin WooShin, Dong WookMyung, Seung-TaekLee, Jae SungKim, Sun-JaeSun, Yang KookLee, Kyung Sub
Keywords
TITANIUM-OXIDE NANOTUBES; LITHIUM STORAGE; TIO2; TEMPERATURE; NANOWIRES; NANORODS
Issue Date
2009-08
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF PHYSICAL CHEMISTRY C, v.113, no.31, pp.14034 - 14039
Abstract
Titanate nanotubes and Ni doped titanate nanotubes were synthesized by hydrothermal method using rutile powders as starting materials. The electrochemical lithium storage of the nanotubes were investigated by cyclic voltammetric methods, and the crystal structure of the titanate nanotubes were computed by the density functional theory (DFT). The microstructure and morphology of the synthesized nanotubes were characterized by X-ray diffraction (XRD), high resolution transmission electron microscopy (HR-TEM). Titanate nanotubes were composed of H(2)Ti(2)O(5)center dot H(2)O in accordance with DFT calculation and had outer and inner diameters of similar to 10 nm and 6 nm, and the interlayer spacing was about 0.65-0.74 nm. Also, Ni dopants were completely doped in the nanotube matrix. The undoped and the Ni doped nanotubes showed initial electrochemical lithium discharge capacity of 303 and 318 mAh/g, respectively; however, the Ni doped nanotubes revealed poor reversibility due to a large interlayer spacing compared with the undoped nanotubes. On the other hand, the undoped nanotubes exhibited good cycling performance because of the open-end and rolled layers with suitable spacing. The relationships between morphology and electrochemical properties have been discussed
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DOI
10.1021/jp903344e
ISSN
1932-7447
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ECHE_Journal Papers
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