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Surfactant-Assisted Ultrasonic Separation Process for Copper Foil and Graphite in Anode Sheets of Spent Lithium-Ion Batteries
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Zhiqiang ZHENG1, 2, Yisheng YANG1, 2, Zifang XU1, Lijie DING2, Maoqin QIU3, Wenming LI1, 2
Mining and Metallurgical Engineering | 2026, 46(2) : 150 - 155
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Mining and Metallurgical Engineering | 2026, 46(2): 150-155
• METALLURGY •
Surfactant-Assisted Ultrasonic Separation Process for Copper Foil and Graphite in Anode Sheets of Spent Lithium-Ion Batteries
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Zhiqiang ZHENG1, 2, Yisheng YANG1, 2, Zifang XU1, Lijie DING2, Maoqin QIU3, Wenming LI1, 2
Affiliations
  • 1.Anhui University of Science and Technology, Huainan 232001, Anhui, China
  • 2.Institute of Energy, Hefei Comprehensive National Science Center (Anhui Energy Laboratory), Hefei 230051, Anhui, China
  • 3.Hefei Technology College, Hefei 230012, Anhui, China
doi: 10.3969/j.issn.0253-6099.2026.02.024
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Anode sheets of spent lithium-ion batteries were taken for research, and an L25 (54) orthogonal test was employed to investigate the effects of ultrasonic temperature, ultrasonic time, ultrasonic frequency and solid-liquid ratio on the separation efficiency of graphite and copper foil in a system with an addition of 0.5% surfactant. A system without surfactant was taken as the control group. The results show that the graphite separation efficiency reaches 95.75% in a system with an addition of 0.5% surfactant, by ultrasonic separation at 90 ℃ for 15 min with a frequency of 100 kHz and solid-liquid ratio of 1∶9. The recovered graphite is basically consistent with those of standard graphite in terms of the XRD diffraction peaks and has a low proportion of disordered structure. The recovered copper foil exhibits favorable mechanical properties, with a tensile strength of 180-190 MPa, and its carrier mobility is 35.68 cm2/ (V·s), indicating excellent electrical conductivity.

spent lithium-ion battery  /  ultrasonic separation  /  surfactant  /  anode sheet  /  copper foil  /  graphite
郑志强, 杨义升, 徐子芳, 丁李杰, 邱茂琴, 李文明. 表面活性剂协同超声分离废旧锂离子电池负极片中石墨和铜箔工艺研究. 矿冶工程杂志, 2026 , 46 (2) : 150 -155 . DOI: 10.3969/j.issn.0253-6099.2026.02.024
Zhiqiang ZHENG, Yisheng YANG, Zifang XU, Lijie DING, Maoqin QIU, Wenming LI. Surfactant-Assisted Ultrasonic Separation Process for Copper Foil and Graphite in Anode Sheets of Spent Lithium-Ion Batteries[J]. Mining and Metallurgical Engineering, 2026 , 46 (2) : 150 -155 . DOI: 10.3969/j.issn.0253-6099.2026.02.024
Appendix
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Year 2026 volume 46 Issue 2
118
23
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Article Info
doi: 10.3969/j.issn.0253-6099.2026.02.024
  • Receive Date：2026-01-13
  • Online Date：2026-10-08
Article Data
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  • Received：2026-01-13
Funding
Affiliations
    1.Anhui University of Science and Technology, Huainan 232001, Anhui, China
    2.Institute of Energy, Hefei Comprehensive National Science Center (Anhui Energy Laboratory), Hefei 230051, Anhui, China
    3.Hefei Technology College, Hefei 230012, Anhui, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
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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