Regensburg 2022 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 24: Functional Semiconductors for Renewable Energy Solutions (joint session HL/KFM)

HL 24.1: Talk

Wednesday, September 7, 2022, 15:00–15:15, H36

A facile freeze-thaw ultrasonic assisted circulation method of graphite flakes prepared by anode graphite from spent lithium-ion batteries — •Yu Qiao^1,2, Zhonghao Rao^3,4, Huaping Zhao¹, and Yong Lei¹ — ¹Fachgebiet Angewandte Nanophysik, Institut für Physik & IMN MacroNano, Technische Universität Ilmenau, 98693 Ilmenau, Germany — ²School of Electrical and Power Engineering, China University of Mining and Technology, 221116, Xuzhou, China — ³School of Energy and Environmental Engineering, Hebei University of Technology, 300401, Tianjin, China — ⁴Hebei Key Laboratory of Thermal Science and Energy Clean Utilization, Hebei University of Technology, 300401, Tianjin, China

Lithium-ion batteries (LIBs) have been widely employed in fast-growing mobile devices, stationary storage devices and electric vehicles. However, limited by particular service life, the booming increase in LIBs production will result in a large retirement wave. As the most common anode material in LIBs, waste graphite has also developed into a mode of high production capacity with the retirement of spent LIBs. Anode graphite (AG) of spent LIBs has the characteristics of large layer spacing and ease of being intercalated due to the reduced interlamination force after repeated charge and discharge cycles. This study presents a facile freeze-thaw ultrasonicassisted circulation method to prepare two-dimensional low-layer graphite flakes (GFs) using AG from spent LIBs. The results indicate that the freeze-thaw ultrasonic-assisted circulation method is feasible for preparing two-dimensional laminar materials.