Abstract
With rutile TiO2 and NaOH as starting materials, the Na2Ti6O13 nanotubes were prepared by a hydrothermal reaction. The carbon-coated Na2Ti6O13 nanotubes were obtained by treating the Na2Ti6O13 nanotubes for 4 h in glucose aqueous solutions containing 0.1 mol?L-1 NaOH. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microcopy (TEM). The results showed that the dimensions of carbon-coated Na2Ti6O13 nanotubes were 14 ~ 19 nm of outer diameter, 2 ~ 5 nm of inner diameter, and several hundreds nanometers of length with a carbon layer of about 2 nm being coated on outer surface of the nanotubes. As an anode material for lithium ion battery, the carbon-coated Na2Ti6O13 nanotubes exhibited an excellent cycle performance and high rate discharge capability compared with the Na2Ti6O13 nanotubes. At 50 mA?g-1, the reversible capacities of the carbon-coated Na2Ti6O13 nanotubes were 161 mAh?g-1 in the initial cycle and 147 mAh?g-1 after 100 cycles. When the discharge-charge current density was 1600 mA?g-1, the reversible capacity of the carbon-coated Na2Ti6O13 nanotubes still reached 70 mAh?g-1，much higher than that of Na2Ti6O13 nanotubes.
Graphical Abstract
Keywords
Li-ion battery, anode material, Na2Ti6O13 nanotubes, carbon-coated, high-rate capability
Publication Date
2012-04-28
Online Available Date
2012-01-15
Revised Date
2011-12-26
Received Date
2011-11-24
Recommended Citation
Guo-Ran LI, Shuai SUN, Xue-Ping GAO.
Electrochemical Performances of Carbon-coated Na2Ti6O13 Nanotubes[J]. Journal of Electrochemistry,
2012
,
18(2): Article 7.
DOI: 10.61558/2993-074X.2893
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol18/iss2/7
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