Abstract
Freestanding and highly ordered TiO2 nanotube membranes were prepared via anodization and annealed at 450, 600, and 800 °C in air and Ar, respectively. Based on the results of XRD and SEM, the membranes annealed in Ar and air possessed different morphology and crystalline phases. Compared with the sample annealed in air, a trace amount of carbon on TiO2 membrane annealed in Ar was detected by EDS spectrum. Electrochemical measurements showed that TiO2 membrane annealed in Ar exhibited better discharge capacity and cyclic stability. The noticeably improved electrochemical performances were attributed to the presence of carbon which enhanced the surface electronic conductivity, the crystalline transformation, and the appropriate morphology, such as large pore, thin wall, and well tube structure.
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This work was supported by National Science Foundation of China (No. 50972165) and Open-End Fund for the Valuable and Precision Instruments of Central South University.
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Wang, Y., Liu, S., Huang, K. et al. Electrochemical properties of freestanding TiO2 nanotube membranes annealed in Ar for lithium anode material. J Solid State Electrochem 16, 723–729 (2012). https://doi.org/10.1007/s10008-011-1417-5
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DOI: https://doi.org/10.1007/s10008-011-1417-5