Polyaniline/TiO2 hybrid nanoplates were synthesized via a sol-gel chemical method. We added TiO2 nanocrystallites of 3-5 nm in diameter to the chemical polymerization of aniline. The loading ratio of TiO2 nanocrystallites to polyaniline altered the morphology of the hybrids from plate-like grains to aggregates. The cyclic voltammetry on the obtained hybrid material revealed that the plate-like structure was more advantageous for the electrochemical stability. The chemical bonding established between polyaniline and TiO2, confirmed by Fourier transformed infrared spectroscopy, is likely to be responsible for the enhanced chemical stability. (C) 2012 Elsevier B.V. All rights reserved.