Cd|KOH|NiOOH

Zn|NH4CI|MnO2

Li|LiClO4|MnO2

Pb|H2SO4|PbO2

H2|KOH|O2

Nanostructured TiO2–TiOF2 composite as anode material for Li-ion battery

TiO2–TiOF2 composite has been synthesized in plasma by the unique method of pulsed high-voltage discharge due to the destruction of Ti electrodes and polytetrafluoroethylene wire. TiO2–TiOF2 features have been investigated by scanning electron microscopy, X-ray diffraction, infrared spectroscopy, energy-dispersive X-ray analysis, Raman spectroscopy, and X-ray photoelectron spectroscopy. It has been shown that composite with a porous surface morphology includes the nanocrystallites of sizes ranging from 40 to 200 nm. The average diameter of the pore is 3–5 nm. Electrochemical characterization of the nanostructured porous TiO2–TiOF2 composite was carried out in view of its application as an anode-active material for Li-ion battery. The initial high specific capacity of the composite is equal up to 1370 mA·h g–1 at a rate of 20 mA g–1. It is higher (due to the TiO2 presence) in comparison with up-to-date TiOF2 anode materials. Galvanostatic charge–discharge cycling of the Li/TiO2–TiOF2 cell in the range of 3.0–0.005 V yields 205 mA·h g–1 after 20 cycles.

Authors: 
Gnedenkov Sergei Vasil'evich, Institute of Chemistry of Far-Easter Branch of RAS, 159d, 100-letiya Ave. of Vladivostok, Vladivostok, 690022, svg21@hotmail.com
Opra Denis Pavlovich, Institute of Chemistry of Far-Easter Branch of RAS, 159d, 100-letiya Ave. of Vladivostok, Vladivostok, 690022, ayacks@mail.ru
Kuryavyi Valerii Georgievich, Institute of Chemistry of Far-Easter Branch of RAS, 159d, 100-letiya Ave. of Vladivostok, Vladivostok, 690022, kvg@ich.dvo.ru
Sinebryukhov Sergei Leonidovich, Institute of Chemistry of Far-Easter Branch of RAS, 159d, 100-letiya Ave. of Vladivostok, Vladivostok, 690022, sls@ich.dvo.ru
Ustinov Aleksandr Yur'evich, Institute of Chemistry of Far-Easter Branch of RAS, 159d, 100-letiya Ave. of Vladivostok, Vladivostok, 690022, les@ich.dvo.ru
Sergienko Valentin Ivanovich, Institute of Chemistry of Far-Easter Branch of RAS, 159d, 100-letiya Ave. of Vladivostok, Vladivostok, 690022, sergienkovi@yandex.ru
Key words: 
titanium oxyfluoride, titanium dioxide, Li-ion battery, nanostructured material
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Journal issue: 
2014. Т. 14, № 2, 
Heading: 
Lithium electrochemical systems
DOI: 
https://doi.org/10.18500/1608-4039-2014-14-2-68-77
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