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Synthesis and electrochemical properties of Ni doped titanate nanotubes for lithium ion storage |
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| Authors: | Dong Hyun Kim Ki Soo Lee Jum Suk Jang Yang-Kook Sun Kyung Sub Lee |
| Institution: | a Division of Materials Science and Engineering, Hanyang University, 17 Heangdang-dong, Seongdong-gu, Seoul, Republic of Korea b Department of Chemical Engineering, Hanyang University, 17 Heangdang-dong, Seongdong-gu, Seoul, Republic of Korea c Department of Chemical Engineering/School of Environmental Engineering, Pohang University of Science and Technology, San 31 Hyoja-dong, Pohang, 790-784, Republic of Korea d Institute/Faculty of Nanotechnology and Advanced Materials Engineering, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul, 143-747, Republic of Korea |
| Abstract: | Ni doped titanate nanotubes were synthesized by hydrothermal method using Ni doped rutile TiO2 nanopowders as a starting material. The electrochemical properties were investigated by cyclic voltammmetric methods. The microstructure and morphology of the synthesized powders were characterized by XRD (X-ray diffraction), and HRTEM (high resolution transmission electron microscopy). Ni doped nanotubes were composed of H2Ti2O5·H2O with outer and inner diameter of ∼10 nm and 6 nm and showed a initial discharge capacity of 305 mAh/g with poor cycling performance. However, after firing, the Ni doped nanotubes revealed better cycling performance due to lower reaction with hydrate and smaller diameter of the tubes. |
| Keywords: | 82 45 Yz |
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