Positive electrode material

A positive-electrode material includes lithium vanadium phosphate particles having an average primary particle diameter from 0.3 µm to 2.6 µm and crystallite sizes from 24 nm to 33 nm. The lithium vanadium phosphate particles are coated with a conductive carbon in a range of 0.5 mass-% to 2.4 mass-% with respect to the total lithium vanadium phosphate particles.