TiN/VN composites with core/shell structure for supercapacitors

TiN/VN core–shell composites are prepared by a two-step strategy involving coating of commercial TiN nanoparticles with V2O5·nH2O sols followed by ammonia reduction. The highest specific capacitance of 170 F g−1 is obtained when scanned at 2 mV s−1 and a promising rate capacity performance is maintained at higher voltage sweep rates. These results indicate that these composites with good electronic conductivity can deliver a favorable capacity performance.

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► Vanadium and titanium nitride nanocomposite with core–shell structure was prepared.
► TiN/VN composites with different V:Ti molar ratios were obtained.
► TiN/VN composites can provide promising electronic conductivity and favorable capacity storage.