Non-destructive removal technology of lithium battery nickel sheet

How to reuse nickel–cobalt–manganese oxide cathodes extracted from lithium-ion batteries?

In this study, we propose a straightforward method for reusing nickel–cobalt–manganese oxide (NCM) cathodes extracted from spent lithium-ion batteries. This method involves direct separation of the NCM film from the aluminum current collector, which is achieved through anodic oxidation of aluminum with the assistance of oxygen evolution.

Is battery recycling a non-destructive method?

Accordingly, the development of battery recycling has surfaced as a highly researched topic in the battery community. Recently, the structural and electrochemical restoration of recycled electrode materials have been proposed as a non-destructive method to save more energy and chemical agents compared with mature metallurgical methods.

Are surface residual lithium compounds Ni-rich cathode materials useful?

As a result, surface residual lithium compounds Ni-rich cathode materials will reduce their comprehensive properties, complicate the subsequent electrode manufacturing process, and severely limit their practical application. Hence, the study of surface removal of residual lithium compounds has great practical significance.

Can surface coating remove lithium compounds from a cathode?

The research results indicate that the reliable surface coating strategy can efficiently remove the residual lithium compounds on the surface and promote the large-scale commercial application of nickel-rich cathode materials. Fig. 6.

Why are residual lithium compounds formed in nickel-rich cathode materials?

Two primary factors are used to account for the formation of residual lithium compounds. One of the reasons for this is that the nickel-rich cathode materials require the addition of an excess lithium source during the production process to compensate for the loss of lithium during high-temperature sintering.

Does aggregation of surface residual lithium affect performance of nickel-rich cathode material?

A lot of research has shown that the aggregation of surface residual lithium of nickel-rich cathode material has a disadvantageous influence on their performance, since they will severely degrade the material's electrochemical characteristics, structural stability, safety, and follow-up treatment process [, , ]. 3.1.