| 摘要 |
PROBLEM TO BE SOLVED: To provide a positive electrode material recovery method from a secondary battery waste material capable of effectively recovering a metal compound useful as a positive electrode material from the secondary battery waste material at a low cost in a reusable form as it is and to provide a nonaqueous electrolyte secondary wherein the metal compound recovered like this is used for a part or all of its positive electrode material. SOLUTION: This positive electrode material recovery method from a secondary battery waste material is used for recovering a metal compound in an electrode material by thermally decomposing the secondary battery waste material in which the electrode material is applied to metal foil. The method comprises: a peeling process for peeling the electrode material from the metal foil by heating the secondary battery waste material to 300-500 deg.C in an oxygen- containing gas current; a separation process for recovering a powder substance by separating and removing the metal foil from the provided peeled material; a roasting process for burning a combustible substance in the powder substance by heating the recovered powder substance to 500-650 deg.C in the oxygen-containing gas current; and a recovery process for recovering the provided roasted substance as the metal compound for the positive electrode material. This nonaqueous electrolyte secondary includes the metal compound recovered like this as a part or all of its positive electrode material. |
