From spent lithium ion battery to supercapacitors: a green and facile approach for recovering carbon-based anode materials

• Published in: Journal of physics. Conference series Vol. 2713; no. 1; pp. 12073 - 12077
• Main Authors: Song, Shanshan, Deng, Danli, Lu, Yingjun, Fan, Wenjie, Xu, Wanli
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.02.2024
• Subjects: Anodes; Ball milling; Capacitance; Carbon; Electric vehicles; Electrode materials; Graphene; Lithium; Lithium-ion batteries; Rechargeable batteries; Recycling; Supercapacitors; Waste utilization
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/2713/1/012073

Abstract With the rapid development of electric vehicles and boosting lithium-ion battery production, recycling waste lithium-ion batteries has been the focus for researchers all over the world. In this study, carbon material was recovered via forming lithium graphite intercalated compound through charging and followed by high energy ball milling. The recovered carbon sample was then prepared as electrodes for symmetric supercapacitors. Electrochemical tests and material characterizations showed that the recovered carbon has a porous graphene-like sheet structure, and the specific surface area and specific capacitance can be effectively increased to 155 m²/g, which is over 10 times higher than that of the untreated carbon. The maximum specific capacitance of recovered carbon material was 41.66 F/g at a scan rate of 100 mV/s with a voltage range of 0-2V, which is 10 times higher than that of untreated carbon. The green and facile recovery method of batteries proposed in this paper provides a new idea and method for the recycling and utilization of waste lithium-ion battery anode materials.