Thermal treatment process for the recovery of valuable metals from spent lithium-ion batteries

Yang, Yue, Huang, Guoyong, Xu, Shengming, He, Yinghe, and Liu, Xin (2016) Thermal treatment process for the recovery of valuable metals from spent lithium-ion batteries. Hydrometallurgy, 165 (Part 2). pp. 390-396.

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In this paper, a process based on reducing thermal treatment before acid leaching for the recovery of valuable materials from spent lithium-ion batteries is developed. The thermodynamic behavior of the active cathode materials is investigated through analyzing the gases evolved from the thermal treatment with a thermogravimetric–mass spectrometry (TG–MS) instrument. Scanning electron microscopy (SEM) with energy dispersive x-ray (EDX) spectroscopy analyses are also performed on the solid cathode and anode materials to determine their physicochemical changes from the thermal treatment. The results show that the thermal treatment significantly improves the clean separation of the active materials from the current collectors and the complete removal of the binder and carbonaceous conductor. It also alters the molecular structures of, and partially reduces the transition metals in, the active cathode materials, which increases the leaching efficiency of the transition metals in the subsequent leaching step. After thermal treatment, the leaching efficiency of nickel, cobalt and manganese from the active cathode materials has reached over 98%, 99% and 84%, respectively.

Item ID: 43496
Item Type: Article (Research - C1)
ISSN: 1879-1158
Keywords: spent lithium-ion battery; reducing thermal treatment; leaching; valuable material recovery
Funders: National Natural Science Foundation of China (NNSF), National Natural Science Commission (NNSC), Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT)
Projects and Grants: NNSF No. 51074096, NNSC Yunnan Joint Project No. U1402274, PCSIRT IRT13026
Date Deposited: 14 Apr 2016 03:47
FoR Codes: 40 ENGINEERING > 4016 Materials engineering > 401607 Metals and alloy materials @ 100%
SEO Codes: 85 ENERGY > 8506 Energy Storage, Distribution and Supply > 850699 Energy Storage, Distribution and Supply not elsewhere classified @ 100%
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