期刊
JOURNAL OF CLEANER PRODUCTION
卷 277, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2020.123585
关键词
Spent lithium-ion batteries; Regenerated graphite; Recycling; Electrochemical performance
资金
- National Key Research and Development Program [2019YFC1907804, 2018YFC1901901]
- Young Elite Scientists Sponsorship Program by China Association for Science and Technology (CAST) [2018QNRC001]
Low-cost regeneration of graphite from spent lithium ion batteries (LIBs) enjoys great significance in solving the problems of utilization and pollution of spent graphite. In this study, a facile approach for recycling graphite from spent LIBs has been developed. Firstly, anode current collector is smelted under nitrogen atmosphere at 1673 K for 4 h. Then, copper and graphite are further separated from each other by simple ultrasonic vibration and sieving. The results show that more than 80% copper above the 200-mesh (0.075 mm) and 77.53% graphite under the 300-mesh (0.048 mm) can be recovered, and the purity of the recovered graphite is higher than 99.5%. The recycled graphite shows high capacity and good cycle performance (specific capacity can be high up to 360.8 mA h g(-1) after 100 cycles at 1C and the retention rate is almost 100%). (C) 2020 Elsevier Ltd. All rights reserved.
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