Vanadium(IV) oxide, also known as vanadium dioxide (VO₂), is a chemical compound composed of vanadium and oxygen. It is notable for its unique properties, including a phase transition that occurs at around 68°C, where it changes from an insulator to a conductor. This transition makes it of interest in various applications, including smart windows and electronic devices. In addition to its electrical properties, vanadium(IV) oxide is also studied for its potential use in energy storage systems, such as batteries. Its ability to undergo reversible changes in conductivity can enhance the efficiency of these systems, making it a valuable material in the field of materials science and engineering.