The transition towards a low-carbon future hinges on the advancement of Lithium-ion battery (LIBs) technology, which has spurred a significant demand for raw materials and the management of waste batteries containing hazardous substances. Developing efficient and environmentally friendly recycling strategies is essential to tackle these challenges. Here, we introduce a one-step green hydrometallurgical recycling of spent lithium-ion batteries’ cathode on the basis of contact-electro-catalytic (CEC) process. It combines the separation of the cathode materials in pretreatment, and leaching in a single step. Specifically, electrode pieces are directly dealt with the CEC treatment, which can remove organic binders (e.g. Polyvinylidene Fluoride) and reduce high-valence metal ions. Results indicate that the leaching efficiency of lithium, nickel, cobalt, and manganese can reach 99.6 %, 98.3 %, 99.4 %,97.4 %. Plus, SiO2 is a cost-effective and readily available catalyst requiring no modification. Therefore, the CEC-assisted one-step hydrometallurgical recycling exhibits sustainability, rapidness, high efficiency, and eco-friendly for LIBs recycling.

中文翻译：

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废旧锂离子电池阴极的一步绿色湿法冶金回收


向低碳未来的过渡取决于锂离子电池 （LIB） 技术的进步，这刺激了对原材料和含有有害物质的废电池管理的巨大需求。制定高效且环保的回收策略对于应对这些挑战至关重要。在这里，我们介绍了一种基于接触电催化 （CEC） 工艺的废旧锂离子电池阴极的一步绿色湿法冶金回收。它将正极材料的分离、预处理和浸出结合在一个步骤中。具体来说，电极片直接进行 CEC 处理，可以去除有机粘合剂（例如聚偏二氟乙烯）并减少高价金属离子。结果表明，锂、镍、钴和锰的浸出效率可达 99.6 %、98.3 %、99.4 %、97.4 %。此外，SiO2 是一种经济高效且易于使用的催化剂，无需改性。因此，CEC 辅助的一步式湿法冶金回收在 LIBS 回收中表现出可持续性、快速性、高效性和环保性。