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Nanocrystalline TiN Derived by a Two-Step Halide Approach for Electrochemical Capacitors

Titanium nitride (TiN) nanocrystallites exhibiting high specific surface area (~128 m2/g) for electrochemical capacitor application were obtained by a two-step halide approach comprised of a room-temperature TiCl4(l)-NH3(g) reaction followed by heat-treatment under NH3 atmosphere. The synthesized ni...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 2006, Vol.153 (12), p.A2298-A2303
Main Authors: Choi, Daiwon, Kumta, Prashant N.
Format: Article
Language:English
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Summary:Titanium nitride (TiN) nanocrystallites exhibiting high specific surface area (~128 m2/g) for electrochemical capacitor application were obtained by a two-step halide approach comprised of a room-temperature TiCl4(l)-NH3(g) reaction followed by heat-treatment under NH3 atmosphere. The synthesized nitride powders were agglomerates containing spherical crystallites ~10 nm in diam and exhibit a specific surface area ranging from 128 to 23 m2/g depending on the heat-treatment temperature. The specific capacitance evaluated by cyclic voltammetry in 1 M KOH electrolyte ranged from 238 to 24 F/g depending on the heat-treatment temperature and the scan rates employed. Structural characterization was performed using X-ray diffraction, helium pycnometry, N2 adsorption for specific surface area measurements using the Brunauer-Emmett-Teller method, Fourier transform infrared spectroscopy, and high-resolution transmission electron microscopy. Results of these studies are presented and discussed.
ISSN:0013-4651
DOI:10.1149/1.2359692