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Abstract：
Rational reusing the waste materials in spent batteries play a key role in the sustainable development for the future lithium-ion batteries. In this work, we propose an effective and facile solid-state-calcination strategy for the recycling and regeneration of the cathode materials in spent LiNi0.5Co0.2Mn0.3O2 (NCM523) ternary lithium-ion batteries. By systemic physicochemical characterizations, the stoichiometry, phase purity and elemental composition of the regenerated material were deeply investigated. The electrochemical tests confirm that the material characteristics and performances got recovered after the regeneration process. The optimal material was proved to exhibit the excellent capacity with a discharge capacity of 147.9 mAh g-1 at 1 C and an outstanding capacity retention of 86% after 500 cycles at 1 C, which were comparable to those of commercial NCM materials.
摘要：
废旧电池中废料的合理再利用对未来锂离子电池的可持续发展起着关键作用。在这项工作中,我们提出了一种有效且简便的固态煅烧策略，用于回收和再生废LiNi0.5Co0.2Mn0.3O2（NCM523）三元锂离子电池中的正极材料。通过系统的物理化学表征，化学计量，对再生材料的相纯度和元素组成进行了深入研究。电化学测试证实,在再生过程之后,材料特性和性能得到恢复。证明最佳材料具有出色的容量，在1C下的放电容量为147.9mAhg-1，在1C下500次循环后的出色容量保持率为86％，与商业NCM材料相当。
