Direct and Rapid High-Temperature Upcycling of Degraded Graphite

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dc.contributor.authorLi, Tangyuan
dc.contributor.authorTao, Lei
dc.contributor.authorXu, Lin
dc.contributor.authorMeng, Taotao
dc.contributor.authorClifford, Bryson Callie
dc.contributor.authorLi, Shuke
dc.contributor.authorZhao, Xinpeng
dc.contributor.authorRao, Jiancun
dc.contributor.authorLin, Feng
dc.contributor.authorHu, Liangbing
dc.date.accessioned2023-10-09T14:54:39Z
dc.date.available2023-10-09T14:54:39Z
dc.date.issued2023-06-27
dc.description.abstractRecycling the degraded graphite is becoming increasingly important, which can helped conserve natural resources, reduce waste, and provide economic and environmental benefits. However, current regeneration methods usually suffer from the use of harmful chemicals, high energy and time consumption, and poor scalability. Herein, we report a continuously high-temperature heating (≈2000 K) process to directly and rapidly upcycle degraded graphite containing impurities. A sloped carbon heater is designed to provide the continuous heating source, which enables robust control over the temperature profile, eliminating thermal barrier for heat transfer compared to conventional furnace heating. The upcycling process can be completed within 0.1 s when the degraded graphite rolls down the sloped heater, allowing us to produce the upcycled graphite on a large scale. High-temperature heating removes impurities and enhances the graphitization degree and (002) interlayer spacing, making the upcycled graphite more suitable for lithium intercalation and deintercalation. The assembled upcycled graphite||Li cell displays a high reversible capacity of ≈320 mAh g−1 at 1 C with a capacity retention of 96% after 500 cycles, comparable to current state-of-the-art recycled graphite. The method is a chemical-free, rapid, and scalable way to upcycle degraded graphite, and is adaptable to recycle other electrode materials.
dc.description.urihttps://doi.org/10.1002/adfm.202302951
dc.identifierhttps://doi.org/10.13016/dspace/7wf8-71sk
dc.identifier.citationLi, T., Tao, L., Xu, L., Meng, T., Clifford, B. C., Li, S., Zhao, X., Rao, J., Lin, F., Hu, L., Direct and Rapid High-Temperature Upcycling of Degraded Graphite. Adv. Funct. Mater. 2023, 2302951.
dc.identifier.urihttp://hdl.handle.net/1903/30876
dc.language.isoen_US
dc.publisherWiley
dc.relation.isAvailableAtA. James Clark School of Engineeringen_us
dc.relation.isAvailableAtMaterials Science & Engineeringen_us
dc.relation.isAvailableAtDigital Repository at the University of Marylanden_us
dc.relation.isAvailableAtUniversity of Maryland (College Park, MD)en_us
dc.subjectdegraded graphite
dc.subjectdirect and rapid upcycling
dc.subjecthigh-temperature heating
dc.subjectlithium-ion batteries
dc.titleDirect and Rapid High-Temperature Upcycling of Degraded Graphite
dc.typeArticle
local.equitableAccessSubmissionNo

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