期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 908, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2022.116087
关键词
Regeneration; Spent lithium-ion batteries; Anode; Spent graphite; Microwave calcination
资金
- Guangdong Key Area RD Pro-gram [2020B090919003]
- National Natural Science Foundation of China [51834008, 51874040]
- Fundamental Research Funds for the Central Universities [FRF-GF-20-02B]
An efficient and economical recycling method for spent anode graphite via microwave has been proposed in this study. The regenerated graphite obtained by microwave calcination has a neat graphite surface and significantly improved electrochemical performance. Microwave calcination has the advantages of selective heating and fast heating rate.
An efficient and economical recycling method for spent anode graphite via microwave has been proposed in this study. The spent graphite (SG) was firstly treated by sulfuric acid curing-acid leaching, and then regenerated by microwave calcination. The effects of microwave calcination temperature and time on electrochemical performance were systematically studied. The morphology and structure of graphite were analyzed by SEM, FT-IR and XRD. The results show that compared with the SG, regenerated graphite (RG) obtained by microwave calcination has a neat graphite surface and a significantly improved electrochemical performance, such as the initial coulombic efficiency and the charge specific capacity at 0.1 C are 83.4% and 354.1 mAh-g(-1), and the capacity retention rate after 60 cycles at 0.1 C increases to 98.3%. In addition, microwave calcination has the advantages of selective heating and fast heating rate. Therefore, this method can realize efficient regeneration of spent anode graphite with low-energy consumption, which provides new light on the recycling of spent graphite.
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