Jun 27, 2019 Pageview：15
Today, most electronic devices such as smartphones,Tablet PC, wearable equipment and electric vehicles use rechargeable lithium-ion batteries. Yes, these lithium batteries last two to three years, and the function and efficiency will be degraded, even at the end of their life. At this time, it is necessary to consider the issue of recycling. A recent study published in the International Journal of Energy Technology and Policy describes a new method for extracting lithium and cobalt from these cells, which make up the bulk of the battery pack.
How to recycle lithium batteries? New technology extracts lithium and cobalt from it!
According to Ataur Rahman, Department of Mechanical Engineering, Malaysian International Islamic University, and Rafia Afroz, Department of Economics, the price of these two metals is increasing due to the need for lithium-ion batteries for the manufacture of lithium-ion batteries. Currently, they have developed a new recycling technology that effectively extracts these metals from waste batteries.
The team used hydrometallurgical technology to recover cobalt and lithium from a 48.8 wh lithium battery during laboratory-grade testing. The process consists of first: baking the battery in an oven at 700 degrees Celsius, "calcining" cobalt, lithium and copper, destroying organic compounds such as plastics and foam. This calcined material carries metals and metal compounds (salts and oxides), followed by strong acid, hydrochloric acid and sulfuric acid to extract metal ions. The team used hydrogen peroxide as a reducing agent to test whether the reagent could improve the leaching process. They are able to extract lithium at about 50% efficiency and extract cobalt at about 25% efficiency.
Since these metals represent 41% and 8.5% of the weight of the 48.8 wh battery, respectively, the overall extraction rate is higher, and the combination of heat and acid constitutes a commercially viable solution for Recycle the electrodes of these batteries.
This leaching metal can then be used to make new batteries or for other industrial applications. This contaminated liquid waste can be further safely recycled.
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