Complex sentence: The Vanadium redox battery, a type of flow battery utilises the electrochemical cell formed by aqueous Vanadium ions of different oxidation state-batteries of the type were first proposed in the 1930s and developed commercially from the 1980s onwards.
Split into simpler sentences: The Vanadium redox battery, a type of flow battery utilises the electrochemical cell formed by aqueous Vanadium ions of different oxidation state. Batteries of the type were first proposed in the 1930s and developed commercially from the 1980s onwards.