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A facile route to synthesize sheet-like Na2Ti3O7 with improved sodium storage properties

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Abstract

A high purity sheet-like Na2Ti3O7 material was synthesized by a new facile solid-state method with hollow sphere TiO2 as titanium source. X-Ray diffraction(XRD) measurement proves that no impurity phase existed when the sample was heated at 900 °C. Charge/discharge measurement was performed in a potential range of 0.01–2.5 V at different current-rates(C-rates). The initial charge/discharge capacities are 191/424 mA·h/g at 0.1 C and still remain as high as 101 mA·h/g after 50 cycles. CV test proves that the large irreversible capacity in the initial cycle results from the formation of the solid electrolyte interface(SEI). However, the electrode presents an increased initial coulombic efficiency in a 1 mol/L NaPF6 electrolyte compared to that in a 1 mol/L NaClO4 electrolyte.

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Authors and Affiliations

  1. Beijing Key Laboratory of Environmental Science and Engineering, School of Chemical Engineering and Environment, Beijing, 100081, P. R. China

    Man Xie, Kangkang Wang, Renjie Chen, Li Li & Feng Wu

  2. National Development Center of High Technology Green Materials, Beijing Institute of Technology, Beijing, 100081, P. R. China

    Man Xie, Renjie Chen, Li Li & Feng Wu

Authors
  1. Man Xie
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  2. Kangkang Wang
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  3. Renjie Chen
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  4. Li Li
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  5. Feng Wu
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Corresponding author

Correspondence to Renjie Chen.

Additional information

Supported by the National Natural Science Foundation of China(No.21373028).

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Xie, M., Wang, K., Chen, R. et al. A facile route to synthesize sheet-like Na2Ti3O7 with improved sodium storage properties. Chem. Res. Chin. Univ. 31, 443–446 (2015). https://doi.org/10.1007/s40242-015-4422-x

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  • DOI: https://doi.org/10.1007/s40242-015-4422-x

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