Gu Shuai, He Ting, Kong Jiao, Fu Tongtong, Guo Zirui, Cui Jingzhi, Chen Zhihao
National Engineering Research Center for Integrated Utilization of Salt Lake Resources, East China University of Science and Technology Shanghai 200237 China
Joint International Laboratory for Potassium and Lithium Strategic Resources, East China University of Science and Technology Shanghai 200237 China.
RSC Adv. 2023 Jan 4;13(2):906-913. doi: 10.1039/d2ra06937g. eCollection 2023 Jan 3.
The boom of the electric vehicle industry significantly aggravates the demand for lithium-ion batteries (LIBs), especially the ternary cathode materials, however, the majority of end-of-life (EOL) LIBs on the market are batteries utilized in customer electronics. Here, we utilized the mixed EOL LIBs from cell phones and laptops to manufacture the LiNiCo0MnO (NCM622) cathode material. A feasible, high efficiency (99.98% Co, 99.98% Ni, 99.99% Mn, and 99.99% Li), and ultra-fast leaching of EOL LIB cathodes was achieved. Thermodynamic calculations suggested that the coordination number, coordination species concentrations, and fractions have significant effects on the apparent activation energy and the equilibrium of the leaching reactions. The remanufactured NCM622 cathode material demonstrated a well-ordered layered hexagonal structure with a low Li/Ni mixing ratio, which facilitated reliable reversible capacity, low polarization, high rate capabilities (163.8 mA h g), and capacity retention ratio (94.3%).
电动汽车行业的蓬勃发展显著加剧了对锂离子电池（LIBs）的需求，尤其是对三元正极材料的需求。然而，市场上大多数报废（EOL）锂离子电池是用于消费电子产品的电池。在此，我们利用来自手机和笔记本电脑的混合报废锂离子电池来制造LiNiCo0MnO（NCM622）正极材料。实现了对报废锂离子电池正极可行、高效（钴99.98%、镍99.98%、锰99.99%、锂99.99%）且超快速的浸出。热力学计算表明，配位数、配位物种浓度和分数对浸出反应的表观活化能和平衡有显著影响。再制造的NCM622正极材料呈现出有序的层状六方结构，锂/镍混合比低，这有利于可靠的可逆容量、低极化、高倍率性能（163.8 mA h g）和容量保持率（94.3%）。
