Waste lithium battery positive and negative materials and recycling
Release Time：2022-11-08 Source：Battery Recycling Machine Share：
The main components of lithium batteries include electrolyte, diaphragm materials, positive and negative electrode materials, etc.. With the rapid development of China's economy, the increasing demand for new materials for lithium batteries in the field of electronic digital and new energy vehicles will bring new opportunities for lithium battery materials. This will bring new opportunities for lithium battery materials. It also brings business opportunities for the recycling of end-of-life lithium battery positive and negative resources.
Since we talk about lithium batteries we have to talk about the positive and negative materials of lithium batteries, let us understand the characteristics of positive and negative materials and how to recycle waste lithium battery positive and negative pieces?
Lithium battery cathode material.
The performance of lithium battery cathode material directly affects the performance of lithium-ion batteries, and its cost directly determines the cost of the battery. Currently developed and applied cathode materials are lithium cobaltate, lithium iron phosphate, lithium manganate, ternary materials lithium nickel cobalt manganate (NCM) and lithium nickel cobalt aluminum acid (NCA) and so on. Lithium iron phosphate is one of the most popular anode materials, with a theoretical specific capacity of 170mAh/g and an actual specific capacity of 150mAh/g or more.
Li-ion battery cathode material.
The negative electrode material of Li-ion battery mainly affects the first time efficiency and cycle performance of Li-ion battery. According to the proportion of lithium-ion battery cost, the cathode material accounts for 25% to 28% of the total cost of lithium battery. With the progress of technology, the current lithium-ion battery anode materials have developed from a single artificial graphite to a situation where natural graphite, intermediate phase carbon microspheres, artificial graphite is the main, soft carbon/hard carbon, amorphous carbon, lithium titanate, silicon-carbon alloy and other anode materials coexist.
Waste lithium battery positive and negative flake through the waste lithium battery positive and negative equipment to resource recovery:.
1, the waste lithium battery positive and negative piece crushing and sorting equipment through the combination of hammering crushing, vibration screening and airflow sorting process to achieve the resource utilization of metal aluminum and positive powder in the waste lithium battery cathode material, and metal copper and carbon powder in the negative material;
2, the negative electrode material through the hammering crushing can effectively achieve mutual stripping between the carbon powder and copper foil, after the vibration sieving based on the size and shape difference between the particles can make the initial separation of copper foil and carbon powder. The results of hammering stripping and sieving separation show that the copper and carbon powder are set in the particle size range of more than 0.250 mm and less than 0.125 mm, with the grade up to 92.4% and 96.6% respectively, which can be directly sent to downstream enterprises for recycling;
3, for the particle size of 0.125 - 0.250mm and low copper grade broken particles, can be used to achieve effective separation between copper and carbon powder, when the airflow speed of 1.00 m / s can achieve good recovery results, the recovery rate of copper metal up to 92.3%, the grade of 84.4% The equipment is mainly used for lithium-ion battery manufacturers, waste lithium battery recycling treatment plant for The equipment is mainly used by lithium-ion battery manufacturers and waste lithium battery recycling plants to separate the aluminum and copper from the positive and negative electrode materials in the scrap positive and negative electrode pieces for the purpose of recycling. The scrap lithium battery positive and negative pieces crushing and sorting equipment operates in the negative pressure state, no dust outflow, the separation efficiency can reach more than 98%.
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