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 1673K for 4h. 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 (0.075mm) and 77.53% graphite under the 300-mesh (0.048mm) 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 mAh g^-1 after 100 cycles at 1C and the retention rate is almost 100%).

利用废锂离子电池（LIB）低成本再生石墨对于解决废石墨的利用和污染问题具有重要意义。在这项研究中，已经开发了一种从废旧LIB中回收石墨的简便方法。首先，将阳极集电器在氮气气氛下于1673K冶炼4小时。然后，通过简单的超声振动和筛分将铜和石墨进一步彼此分离。结果表明，在200目（0.075mm）以上的铜中可回收80％以上的铜，在300目（0.048mm）以下的石墨中可回收77.53％的石墨，回收的石墨的纯度高于99.5％。回收的石墨显示出高容量和良好的循环性能（比容量可高达360.8 mAh g ^-1 在1C下经过100个循环后，保留率几乎达到100％）。