Cathode material manufactured by a method comprising: a first process including a step of applying shearing stress and centrifugal force inside a spinning reaction container to an aqueous solution of a mixture including a vanadium source, conductive carbon material, an organic compound having a plurality of carboxyl groups, and alcohol having a plurality of hydrogen groups, to bond vanadium oxide to a surface of the conductive carbon material; and a second process including a step of adding a phosphate source and a lithium source to the mixture and applying shearing stress and centrifugal force to the mixture inside the spinning reaction container, to produce lithium vanadium phosphate with particle shapes bonded to the surface of the conductive carbon material, wherein the first process further includes, after the step of bonding the vanadium oxide to the surface of the conductive carbon material: a step of drying the mixture; and a step of sintering the mixture, and the second process further includes, after the step of producing the lithium vanadium phosphate with particle shapes bonded to the surface of the conductive carbon material: a step of drying the lithium vanadium phosphate; and a step of sintering the lithium vanadium phosphate, wherein the cathode material comprises: lithium vanadium phosphate including vanadium with a valence that changes between 3 and 5 due to removal and insertion of lithium ions; and conductive carbon material; the lithium vanadium phosphate is bonded to a surface of the conductive carbon material, the lithium vanadium phosphate includes a metal M selected from among aluminum, gallium, and indium, the metal forms a solid solution in the lithium vanadium phosphate, the lithium vanadium phosphate including the metal is expressed by a general formula of Li 3 V 2-x M x (PO 4) 3 or LiV 2-x M x (PO 4) 3, where 0 < x ≤ 0.5, and 90% or more of the lithium vanadium phosphate by total weight is particle-shaped crystals with diameters from 10 nm to 200 nm. a first process including a step of applying shearing stress and centrifugal force inside a spinning reaction container to an aqueous solution of a mixture including a vanadium source, conductive carbon material, an organic compound having a plurality of carboxyl groups, and alcohol having a plurality of hydrogen groups, to bond vanadium oxide to a surface of the conductive carbon material; and a second process including a step of adding a phosphate source and a lithium source to the mixture and applying shearing stress and centrifugal force to the mixture inside the spinning reaction container, to produce lithium vanadium phosphate with particle shapes bonded to the surface of the conductive carbon material, wherein the first process further includes, after the step of bonding the vanadium oxide to the surface of the conductive carbon material: a step of drying the mixture; and a step of sintering the mixture, and the second process further includes, after the step of producing the lithium vanadium phosphate with particle shapes bonded to the surface of the conductive carbon material: a step of drying the lithium vanadium phosphate; and a step of sintering the lithium vanadium phosphate, wherein a step of drying the mixture; and a step of sintering the mixture, and the second process further includes, after the step of producing the lithium vanadium phosphate with particle shapes bonded to the surface of the conductive carbon material: a step of drying the lithium vanadium phosphate; and a step of sintering the lithium vanadium phosphate, wherein a step of drying the lithium vanadium phosphate; and a step of sintering the lithium vanadium phosphate, wherein lithium vanadium phosphate including vanadium with a valence that changes between 3 and 5 due to removal and insertion of lithium ions; and conductive carbon material; the lithium vanadium phosphate is bonded to a surface of the conductive carbon material, the lithium vanadium phosphate includes a metal M selected from among aluminum, gallium, and indium, the metal forms a solid solution in the lithium vanadium phosphate, the lithium vanadium phosphate including the metal is expressed by a general formula of Li 3 V 2-x M x (PO 4) 3 or LiV 2-x M x (PO 4) 3, where 0 < x ≤ 0.5, and 90% or more of the lithium vanadium phosphate by total weight is particle-shaped crystals with diameters from 10 nm to 200 nm.