Recovery method for active matter from waste material containing lithium ionic cell anode active matter

Abstract

The invention relates to a method for recovering active material in waste of anode active material of a lithium ion battery. The waste contains anode active material of the lithium ion battery, binder and conductive agent. The method includes the processes: removing most of the binder and the conductive agent in the waste of the anode active material of the lithium ion battery, and then further removing small part of the binder and the conductive agent remained in the anode active material, wherein the method for removing small part of the binder and the conductive agent remained in the anode active material includes washing the anode active material in which the small part of the binder and the conductive agent is remained with cleaning agent, which is one or more selected from alcohol, aqueous solution of alcohol, aldehyde, aqueous solution of aldehyde, ketone, aqueous solution of ketone and aether. The method in the invention has a high recovery rate, and the recovered cathode active material has high purity and good performance and can be directly used for the preparation of a lithium ion secondary battery.

Description

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AI Technical Summary

Benefits of technology

This patented technology uses different chemicals together from water-based solutions like ethylene glycol monomethylethermal acid ammonia (EGTA) and acetonitrile to effectively extract tiny parts called binders that remain on the surface of anode materials without sticking them onto other components inside these battery cells. These techniques improve the efficiency and quality of Lithium production processes while reducing costs associated with separating excess binder after create certain types of impurities.

Problems solved by technology

Layered nickel sulphoferrite (LNS)-based negative elec trodes have been developed due to their ability to store energy without losing them when they go back up overtime. However, there has always existed issues related to how efficiently recover spent lithiated cells containing LS-, LCO_{2/Li, MnO1.2 /Pb2. It involves separating certain components beforehand, followed by thermal treatments like burning off excess parts while leaving behind only those needed for good quality products. Additionally, current methods require expensive equipment and long periods of processing times.}

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