What’s the difference between recycling anode&cathode sheets of li-batteries?

What’s the difference between recycling anode&cathode sheets of li-batteries?

In the realm of lithium battery recycling, the anode and cathode sheets play different roles. As the demand for sustainable resource management grows, understanding the disparities in recycling these two components becomes of utmost importance. This not only aids in optimizing the li-batteries recycling process but also in recovering valuable materials more efficiently. So, what exactly sets the recycling of anode sheets apart from that of cathode sheets? Let’s explore.

Differences in Recycled Object Composition Between Cathode and Anode Sheets

Anode sheet involve graphite and carbon materials

The anode (negative electrode) materials of lithium – ion batteries commonly include carbon materials such as graphite. During the recycling process, the focus is on separating and recycling graphite and other components, as well as the possible copper foil. When recycling, the separation method of graphite and copper foil needs to be considered, such as physical shredding followed by screening to separate the graphite and copper foil.

Cathode sheet contain metal materials

The cathode (positive electrode) materials contain a variety of metal elements such as cobalt, nickel, manganese, and lithium. During recycling, specific chemical leaching processes are required to extract these metals. The equipment must be able to withstand the corrosion of corresponding chemical reagents and effectively separate and enrich metal ions.

Different Recycling Processes and Principles Between Cathode and Anode Sheets

Anode - Sheet Recycling Machine Mainly Physical Recycling

Physical means such as shredding and crushing are usually used first to break the waste anode sheets into smaller particles for subsequent separation. For example, through mechanical crushing, graphite particles are detached from the copper foil, and then screening and air – flow sorting methods are used to separate the graphite and copper foil.

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Positive electrode sheet crushing process flow chart

Chemical Recycling is the Key for Cathode – Sheet Recycling Machine

For cathode materials containing cobalt, an acidic leaching agent (such as sulfuric acid) may be used under certain temperature, pressure, and reaction – time conditions to leach cobalt and other metal ions into the solution.

Differences in Equipment Structure and Components Between Cathode and Anode Sheets

It generally includes crushers, grinders, screening equipment, and air – flow sorting devices. The crusher is used to preliminarily crush the anode sheets, the grinder further refines the particles, the screening equipment separates different components according to particle size, and the air – flow sorting device separates components such as graphite and copper foil according to their density differences under the action of air – flow.

Leaching Reactor needs to be able to withstand the high – temperature, high – pressure, and corrosive environment during the chemical leaching process. The material of the reactor is usually acid – resistant stainless steel or special alloys.

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