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Waste lithium-ion batteries contain precious metals, which is difficult to separate each other in order to recycle. Waste batteries are sustainable sources of these metals, especially cobalt and nickel, but currently used to isolate defects in environmental and efficiency. A new technique uses electrochemistry to effectively separate and recover the metal, so that the waste battery has a highly sustainable secondary source of cobalt and nickel, and the reserves of cobalt and nickel are currently decreasing.
A new study of Xiao Su, a new study, a new study, a new study, a new study, a new study, a new study, a new study, a selection electrodeposition, a commercial source, a commercial source, is recovered, a valuable metal is recovered in a battery electrode. This method publishes the final product of cobalt and nickel from a purity of about 96.4% and 94.
1% from the waste NMC electrode waste. Su said, cobalt and nickel have similar electrochemical properties - or standard reduction potential - this makes chemists difficult to recover the pure form of each metal from battery electrodes. "There are many ways to be used to recover cobalt and nickel from the battery electrodes, but they all have a disadvantage.
" Su said. "Most of the need for energy-intensive high temperature technology or strong solvent, which will bring handling challenges. The industry needs methods that do not cause additional problems, such as high energy consumption or toxic waste.
"The uniqueness of this study is that the team has developed a regulated liquid electrolyte and a polymer coating on the electrode. In the laboratory, the researchers combined the electrolyte-polymer method with the removal, leaching and liquefaction assembly of the fully discharged NMC battery electrode. By adjusting the salt concentration of the electrolyte and the thickness of the polymer coating, the researchers noted that different cobalt and nickel sediments were accumulated by continuous electrodeposition on the surface of the electrode.
At the end of this process, the electrodes have been collected with high purity cobalt and nickel coatings. The research report said that economic analysis of new methods suggests that once considers material revenue, material cost and energy consumption, it is competitive than current lithium battery recovery methods. "The future needs further engineering optimization, but the first concept verification study confirmed that low temperature cobalt and nickel electrochemical recovery is possible," Su said.
"We are very excited because this study shows a good example, indicating that sustainable power drive separation is used to recycle electrochemical cells. "Su is also affiliated to the Institute of Advanced Science and Technology, Beckman, is also a professor of Civil and Environmental Engineering, Illinois. This work was contributed by the Leaders of the Postdoctoral Research Assistant, Illinois.
Graduate DarienrayMond and Riccardocandeago also made. .
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