Coatings based on reduced stoichiometries of titanium dioxide obtained by Atmospheric Plasma Spray
are presented for their application as electrodes in devices such as lead acid batteries, redox
flow bat-teries and electrochemical reactors. A study of their microstructure, composition and mechanical
properties is first presented in this paper to show that the layers are compact, free of cracking and well
adhered to the substrate. The presence of Magnéli phase oxides, particularly Ti8O15 was identified in the
coatings, which enhances their electrical conductivity. In order to understand the behaviour of this
material as an electrode, an electrochemical analysis of the coatings was also done. The coated samples
showed higher oxygen and hydrogen evolution overpotentials and lower electrochemical corrosion
compared to typically used commercial stainless steel and carbon-polymer composite electrodes