Novel strategy towards in-situ recycling of valuable metals from spent lithium-ion batteries through endogenous advanced oxidation process

Leaching Li from mixed cathode materials of spent lithium-ion batteries via carbon thermal reduction

“…Mn 2p 3/2 and Mn 2p 1/2 in the roasted raw materials and filter residue belong to Mn 2+ . 13,14 Secondly, the Co 2p 3/2 (779.88 eV) peak and Co 2p 1/2 (794.68 eV) peak in the Co 2p spectrum of unburned raw materials belong to Co 3+ , while the Co 2p 3/2 (780.34 eV) peak, Co 2p 1/2 (792.3 eV), and Co (771.91 eV) peaks in the Co 2p spectrum of roasted raw materials and filter residue belong to Co 2+ and Co. At this point, some of the nickel is reduced to elemental nickel, which is consistent with the metal phase distribution diagram and XRD diagram we mentioned earlier. The Ni 2p 3/2 peak (854.86 eV) and Ni 2p 1/2 peak (872.31 eV) in the Ni 2p spectrum of the unburned raw material belong to Ni 2+ .…”

“…13 , 29,30 The process involves roasting and extracting lithium based on different types of LIBs. 2,14,15 However, when faced with a large variety and quantity of S-LIBs, it is difficult to accurately classify them. 10,16 Specifically, the acid leaching process uses some organic acids such as malic acid, formic acid, and oxalic acid and inorganic acids such as HCl, H 2 SO 4 , and H 3 PO 4 as leaching agents.…”