METHOD FOR MANUFACTURING NEGATIVE ELECTRODE MATERIAL

PROBLEM TO BE SOLVED: To achieve further enhancement of the function of a negative electrode material including a silicon material.SOLUTION: A method for manufacturing a negative electrode material comprises: a granulating step of spraying and drying a slurry containing particles of a silicon material having a structure in which a plurality of platy silicon bodies are laminated in a thickness direction, a pitch and a solvent, thereby obtaining a granulated material of 1.5-50.0 μm in average particle diameter; and a heating step of heating the granulated material to a temperature equal to or higher than a carbonization temperature of the pitch to obtain a negative electrode material.SELECTED DRAWING: Figure 1 【課題】シリコン材料を含有する負極材料について機能の更なる向上を図ること。【解決手段】複数枚の板状シリコン体が厚さ方向に積層されてなる構造を有するシリコン材料の粒子と、ピッチと、溶剤と、を含むスラリーを噴霧乾燥して、平均粒子径１．５〜５０．０μｍの造粒体を得る造粒工程と、前記造粒体を前記ピッチの炭化温度以上に加熱して負極材料を得る加熱工程と、を有する、負極材料の製造方法。【選択図】図１