▎ 摘　　要

NOVELTY - Producing cathode material comprises (a) preparing a cathode material precursor by coprecipitating a mixture containing nickel salt, cobalt salt, manganese salt, complexing agent, and pH adjusting agent in Taylor vortex state; (b) preparing a pulverized cathode material precursor by pulverizing the cathode material precursor; and (c) mixing the pulverized cathode material precursor with a lithium source and heat-treating to prepare a cathode material. The grinding is grinding using a planetary mixer. The anode material has size of 80-300 nm. USE - The cathode material is useful for producing all-solid-state lithium secondary battery (claimed). ADVANTAGE - The method produces cathode material having high-capacity and small volume change of unit cell of crystal during charging and discharging by pulverizing cathode precursor, enables mass production, improves energy efficiency by applying the cathode material, and is easy to apply to production site by utilizing the co-precipitation method. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for producing all-solid-state lithium secondary battery, comprising (a1) preparing cathode comprising the cathode material, (b1) preparing solid electrolyte layer containing solid electrolyte, and (c1) preparing all-solid-state lithium secondary battery by stacking the positive electrode, the solid electrolyte layer, and the negative electrode. DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart illustrating the method for producing cathode material (Drawing includes non-English language text).