With the increase of electric vehicles, mobile phones and other electronic devices, the problem of excess lithium ion batteries is increasing. Researchers at Rice University have found a way to solve this problem. According to foreign media reports, Rice material scientist Pulickel Ajayan and his colleagues developed an environmentally friendly eutectic solvent made of choline chloride and ethylene glycol that can be extracted from the common metal oxides of positive electrodes in lithium-ion batteries More than 90% cobalt. The researchers say their goal is to simplify the battery recycling process and keep them away from the dump. Rice University graduate student and lead author of the research report Kimmai Tran said: "Someone has tried experiments with acids in the past. Although it is quite effective, it is corrosive and not environmentally friendly. Other experimental methods also have shortcomings. In general, recycling Lithium ion batteries are usually expensive and risky. The advantage of this eutectic solvent is that it can dissolve a variety of metal oxides. It is actually composed of chicken feed additives and ordinary plastic precursors at room temperature Mixing them together will form a transparent, relatively non-toxic solution with good solubility properties. " A eutectic solvent is a mixture of two or more compounds that solidifies at a much lower temperature than the respective precursor. She said that in this way, liquids can be obtained from simple solid combinations. Tran said: "The large drop in freezing point and melting point is due to the formation of hydrogen bonds between different chemicals. By choosing the appropriate precursor, an interesting and cheap 'green' solvent can be made." The researchers made small prototype batteries. Experiments show that the solvent can dissolve cobalt and lithium, and at the same time separate the metal oxide from other compounds in the electrode. They found that cobalt can be recovered from the eutectic solution to the steel mesh by precipitation or even electroplating. The latter method makes it possible to reuse the eutectic solvent itself. Marco Rodrigues, a postdoctoral researcher at Argonne National Laboratory and Rice ’s alumnus, said: “We focus on cobalt. Lithium is also valuable, but cobalt is not only environmentally scarce, but also difficult to obtain from a social perspective.†It is pointed out that the US Department of Energy is stepping up the promotion of battery recycling technology, and recently announced the establishment of a lithium-ion battery recycling center. The road ahead requires continued efforts. Peel Type Blind Rivets With Large Flange Peel Type Blind Rivets With Large Flange,Peel Type Blind Rivets Large Flange,Large Flange Peel Type Blind Rivets,Large Flange Peel Type Blind Rivet KD METALS (JINGJIANG) CO.,LTD , https://www.toprivet.com
(Source: Rice official website)