Methods and Conclusions of Waste Power Wall Battery Recycling

The amount of scrapped power batteries will increase year by year, and the peak of power battery retirement will follow. It is estimated that the scrapped amount of power batteries will exceed 220,000 tons (about 20 GWh) in 2020. Power wall Battery cathode material has the advantages of high specific energy, long cycle life, and good safety. It is widely used in various new energy vehicles, especially the power battery of pure electric buses with high safety requirements. At present, battery backup solar occupies a large market share in power batteries, which means that a large part of power batteries that will be scrapped in the future will be Power wall batteries. Therefore, it is very necessary to carry out harmless treatment and recycling of waste Power wall Batteries.

Here is the content list:

• There are three main categories of methods for recycling waste Power wall Battery cathode materials.

• The conclusion of the recycling of waste Power wall Battery cathode materials.

There are three main categories of methods for recycling waste Power wall Battery cathode materials

Although the Power wall Battery does not contain heavy metal pollutants such as lead and mercury, the discarded Power wall Battery is still harmful to the environment. At present, most of the research on the recycling of waste Power wall batteries is aimed at positive electrode materials, which are mainly composed of lithium iron phosphate, conductive carbon black, PVDF, and so on. Waste Power wall Battery positive electrode materials are rich in metals such as iron and lithium, among which the element with the most recycling value is lithium, iron also has a certain recycling value, and the recycling value of other parts is relatively low. Since the waste Power wall Battery cathode material does not contain high-value metals such as cobalt and nickel, its recycling value is lower than that of other types of waste lithium-ion batteries such as NCM ternary materials. Therefore, the waste solar charger battery has higher requirements for high efficiency and low cost of the recycling process. At present, there are three main methods of recycling waste Power wall Battery positive electrode materials: one is the wet process of waste lithium iron phosphate to recover valuable metals; the other is the repair and regeneration of waste lithium iron phosphate; the third is the decomposition and recycling of waste Power wall Battery synthesis.

The conclusion of the recycling of waste Power wall Battery cathode materials

Scrap Power wall Battery does not contain high-value metals such as cobalt and nickel, and their economic value is low. At present, there is no more economical and environmentally friendly process for large-scale recycling of waste lithium iron phosphate battery cathode materials. Although the traditional wet full-component leaching process has a high metal recovery rate and high product purity, the process is long, the operation is complicated, the consumption of acid and alkali is large, waste liquid is generated, causing secondary pollution, and the economic benefits of process recovery are poor. In contrast, the wet selective leaching of the lithium process is simplified, the consumption of reagents is small, and the selectivity of lithium leaching is high. It has attracted much attention, and some enterprises have begun to apply it industrially. However, the main problems that need to be solved in the future this process are:

1. Continue to improve the leaching rate of lithium.

2. Replace reagents such as hydrogen peroxide and organic acids with cheaper and environmentally friendly reagents.

3. Continue to reduce the leaching rate of iron and simplify the recovery process.

4. High-value utilization of leaching slag iron phosphate.

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