Enabling multi-electron reaction of ε-VOPO₄ to reach theoretical capacity for lithium-ion batteries

Abstract

By controlling the morphology and particle size of the epsilon polymorph of vanadyl phosphate, ε-VOPO4, it can fully reversibly intercalate two Li-ions and reach the theoretical capacity of 305 mA h g-1 over two voltage plateaus at about 4.0 and 2.5 V.