METHOD FOR RECOVERING POSITIVE ELECTRODE ACTIVE MATERIAL

• Main Author: YOKOYAMA TOMOHIRO
• Format: Patent
• Language: English; Japanese
• Published: 18.07.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide a method for recovering a positive electrode active material in which quality of the recovered positive electrode active material is good and productivity is high.SOLUTION: A method for recovering a positive electrode active material from a battery having a positive electrode plate in which a positive electrode mixture containing a positive electrode active material is laminated on a positive electrode foil includes a step of separating and recovering the positive electrode mixture from the positive electrode plate and supplying at least one of ozone and hydrogen peroxide to a slurry containing the positive electrode mixture to oxidize the positive electrode mixture.SELECTED DRAWING: Figure 1 【課題】回収される正極活物質の品質が良好で、生産性が高い正極活物質の回収方法を提供する。【解決手段】正極電極箔に正極活物質を含む正極合材が積層された正極板を有する電池から正極活物質を回収する方法であって、正極板から正極合材を分離回収し、正極合材を含むスラリーにオゾン及び過酸化水素の少なくとも一方を供給して正極合材を酸化する工程を含む。【選択図】図１