Regensburg 2022 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 18: Poster Session 2

MM 18.21: Poster

Tuesday, September 6, 2022, 17:30–20:00, P2

Recycling of anode graphite from spent lithium-ion batteries and reused in heat transfer medium — •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, LIBs face a large wave of retirement because of a certain life. Graphite is the most common anode material in LIBs, amount of waste graphite will also be produced with the retirement of spent LIBs. Anode graphite (AG) from spent LIBs has the characteristics of large layer spacing and ease of being intercalated due to reducing the interlamination force after repeated charge and discharge cycles. In this study, two-dimensional graphite flakes (GFs) were prepared from spent AG through a freeze-thaw ultrasonic-assisted circulation method. The heat transfer ability of as-obtained GFs dispersed in ethylene glycol was investigated experimentally. The results indicated that GFs could enhance the heat transfer coefficient and the maximum enhancement is about 30%.