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Nanostructured TiO2-TiOF2 composite synthesized by the original method of pulsed high-voltage discharge as anode material for Li-ion battery

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Abstract

It has been demonstrated for the first time that an original method of pulsed high-voltage discharge is efficient for the preparing of nanostructures promising for application in Li-ion batteries. In particular, a nanostructured TiO2-TiOF2 composite is synthesized as a result of destructing Ti electrodes and polytetrafluoroethylene in plasma. It is established that TiO2-TiOF2 is a porous structure composed of TiO2 and TiOF2 nanocrystallites 40–200 nm in size. The diameter of pores varies from 3 to 5 nm. The discharge capacity of a Li/TiO2-TiOF2 half-cell during a first cycle at a current density of 20 mA/g in voltage range from 3 to 0.005 V amounted to 1370 mA h/g, which exceeds (due to the presence of TiO2) the theoretical capacity of TiOF2. The cycling of Li/TiO2-TiOF2 characterizes the stability of the capacity about 205 mA h/g after the 20th cycle.

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Authors and Affiliations

  1. Institute of Chemistry, Far Eastern Branch, Russian Academy of Sciences, pr. 100-Letiya Vladivostoka 159, Vladivostok, 690022, Russia

    S. V. Gnedenkov, D. P. Opra, V. G. Kuryavyi, S. L. Sinebryukhov, A. Yu. Ustinov & V. I. Sergienko

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  1. S. V. Gnedenkov
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  2. D. P. Opra
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  3. V. G. Kuryavyi
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  4. S. L. Sinebryukhov
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  5. A. Yu. Ustinov
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  6. V. I. Sergienko
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Correspondence to S. V. Gnedenkov.

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Original Russian Text © S.V. Gnedenkov, D.P. Opra, V.G. Kuryavyi, S.L. Sinebryukhov, A.Yu. Ustinov, V.I. Sergienko, 2015, published in Rossiiskie Nanotekhnologii, 2015, Vol. 10, Nos. 5–6.

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Gnedenkov, S.V., Opra, D.P., Kuryavyi, V.G. et al. Nanostructured TiO2-TiOF2 composite synthesized by the original method of pulsed high-voltage discharge as anode material for Li-ion battery. Nanotechnol Russia 10, 353–356 (2015). https://doi.org/10.1134/S1995078015030076

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  • DOI: https://doi.org/10.1134/S1995078015030076

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