▎ 摘　　要

NOVELTY - Microsphere nano-material comprises trisodium divanadium tris(orthophosphate)reduced graphene oxide, the diameter of microsphere is 1-4 mu m, and crystalline with a lattice spacing of 0.372 nm. USE - The nano-material is useful in aqueous zinc ion battery as active material (claimed). ADVANTAGE - The method has high reversible capacity, good circulation stability, and high performance rate. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing microsphere nano-material, comprising (i) adding sodium source, phosphorus source, and vanadium source powder into de-ionized water, and dissolving completely, (ii) adding reduced graphene oxide into the obtained solution, and stirring continuously, and (iii) spray-drying the obtained solution, and calcining.