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Experimental study on recovery of lithium cobalt oxide cathode by microwave-assisted deep eutectic solvent extraction
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Xiaogang ZOU1, Wenjun MA2, Guoping NIU1, Zhiyuan LIANG2, Fei ZHOU1, Qinxin ZHAO2, Wenfeng LI1
Thermal Power Generation | 2023, 52(8) : 70 - 80
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Thermal Power Generation | 2023, 52(8): 70-80
• Thermal energy science research •
Experimental study on recovery of lithium cobalt oxide cathode by microwave-assisted deep eutectic solvent extraction
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Xiaogang ZOU1, Wenjun MA2, Guoping NIU1, Zhiyuan LIANG2, Fei ZHOU1, Qinxin ZHAO2, Wenfeng LI1
Affiliations
  • 1.Xi'an TPRI Boiler and Environmental Protection Engineering Co., Ltd., Xi'an 710054, China
  • 2.Key Laboratory of Thermo-Fluid Science and Engineering of MOE, Xi'an Jiaotong University, Xi'an 710049, China
Published: 2023-08-25 doi: 10.19666/j.rlfd.202212209
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The process of conventional hydrometallurgical recovery of lithium batteries not only consumes corrosive acid and long-time reaction, but also produces secondary wastes. In this paper, microwave-assisted deep eutectic solvent (DES) is used to leach and recover valuable metals from cathode material LiCoO2 (LCO). The leaching and recovery process is not only green and low-pollution, but also owns a fast reaction rate, good solubility stability of the valuable metal and high purity of the recovered product. Meanwhile, FT-IR, XRD, ICP-MS, SEM and electrochemical analysis methods are used to explore the mechanism of microwave-assisted DES leaching of valuable metals from LCO. The effects of experimental factors on the extraction efficiency of valuable metals are obtained by orthogonal test method. The degree of influence is DES>temperature>liquid-solid ratio>time. Afterwards, according to the results of orthogonal experiments, the single-factor experiments are successively adopted to explore the optimal experimental conditions for microwave-assisted leaching of valuable metals, 99.86%of Li and 99.05% of Co can be extracted under the condition of choline chlorine-oxalic acid (ChCl-OA), 180 ℃, 10 min and liquid/solid ratio (L/S) of 60 mL/g. At this time, Co exists in the leaching solution as formic acid cobalt. Finally, a green and efficient strategy for extraction of valuable metals from spent LiBs (LCO) through microwave-assisted DES is proposed, which provides an important reference method for recovery of valuable metals from spent lithium-ion batteries.

lithium battery  /  deep eutectic solvent  /  microwave  /  hydrometallurgy recovery  /  lithium cobalt oxide
Xiaogang ZOU, Wenjun MA, Guoping NIU, Zhiyuan LIANG, Fei ZHOU, Qinxin ZHAO, Wenfeng LI. Experimental study on recovery of lithium cobalt oxide cathode by microwave-assisted deep eutectic solvent extraction[J]. Thermal Power Generation, 2023 , 52 (8) : 70 -80 . DOI: 10.19666/j.rlfd.202212209
Funding
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  • Science and Technology Project of China Huaneng Group Co., Ltd.(HNKJ21-HF58)
  • National Key Research and Development Program(2021YFC3001803)
  • Shaanxi Youth Science and Technology Nova Project(2022KJXX-51)
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Year 2023 volume 52 Issue 8
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84
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Article Info
doi: 10.19666/j.rlfd.202212209
  • Online Date：2026-01-26
  • Published：2023-08-25
Article Data
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History
  • Revised：2022-12-30
Funding
Science and Technology Project of China Huaneng Group Co., Ltd.(HNKJ21-HF58)
National Key Research and Development Program(2021YFC3001803)
Shaanxi Youth Science and Technology Nova Project(2022KJXX-51)
Affiliations
    1.Xi'an TPRI Boiler and Environmental Protection Engineering Co., Ltd., Xi'an 710054, China
    2.Key Laboratory of Thermo-Fluid Science and Engineering of MOE, Xi'an Jiaotong University, Xi'an 710049, China
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https://castjournals.cast.org.cn/joweb/rlfd/EN/10.19666/j.rlfd.202212209
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表12种不同金属材料的力学参数
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Number of
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Number of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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