A flexible, porous TiOxNy sheet consisting of numerous conductive fibers was synthesized by nitridation of titanate and further used as an electrochemical electrode. The high surface area and mixed-oxidation state of titanium make TiOxNy sheets to be promising candidates for a good supercapacitor.

Cobalt titanate (CoTiO3) powder was prepared by a modified sol‐gel method. The precursor solution could be prepared by cobalt acetate and titanium isopropoxide using various solvents either with or without HCl. After post‐heat treatment in air from 500 to 900 °C, CoTiO3 powder with increasing crystallinity was obtained. The fundamental properties of the powder were characterized by X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS), and Brunauer‐Emmett‐Teller (BET) analysis. The effects of post‐heat treatment at different temperatures were discussed based on results of these analyses. The results showed that single‐phase CoTiO3 can be prepared by straightforward sol‐gel spin‐coating method followed by heat treatment at fairly low temperature of 550 °C. The dielectric constant of the CoTiO3 powder thus prepared was found to be 34.5 by C‐V analysis. High‐k material application is promising for the CoTiO3 powder thus prepared.