Anjali V. Nair, Silpasree S. Jayasree, Dona Susan Baji, Shantikumar Nair and Dhamodaran Santhanagopalan
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引用次数: 0
摘要
为了建设一个清洁和可持续发展的世界,锂离子电池(LIBs)等储能系统因其广泛的应用而发挥着至关重要的作用。因此,回收利用在减少电子垃圾和减少原始材料开采方面发挥着至关重要的作用。在此,我们展示了一种减少电子垃圾的战略方法,通过再生电池有效地重复使用相同的材料,从而实现循环经济。研究重点是通过水冶工艺,用两种不同的环境友好型酸回收和再生 LiNi0.5Mn0.3Co0.2O2 (NMC532)正极材料。通过 X 射线衍射、透射电子显微镜和 X 射线光电子能谱对再生材料进行了表征。再生的混合金属磷化物和氧化物阳极在 LIB 系统中表现出优异的电化学性能。这项工作开辟了一种简单、可扩展的方法,用于开发 NMC 电池的回收和再生,促进循环经济,从而为这一领域的更多发展开辟了道路。
Environment-friendly acids for leaching transition metals from spent-NMC532 cathode and sustainable conversion to potential anodes†
For a clean and sustainable world, energy storage systems like Li-ion batteries (LIBs) will play a vital role due to their wide range of applications. The exponential growth of batteries will lead to the generation of a substantial number of failed batteries in the near future. As a consequence, recycling will play a crucial role to reduce e-waste and to scale down the mining of virgin materials. Herein, we demonstrate a strategic approach to reduce e-waste and effectively reuse the same materials by regenerating batteries, enabling a circular economy. The study focuses on the recycling and regeneration of LiNi0.5Mn0.3Co0.2O2 (NMC532) cathode material via a hydrometallurgical process with two different environmentally friendly acids. The regenerated materials were characterized by X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy. Regenerated mixed metal phosphide and oxide anodes exhibited excellent electrochemical performance in an LIB system. This work opens up the scope for a simple and scalable approach to develop the recycling and regeneration of NMC batteries, which will facilitate a circular economy, thereby leading the way for more developments in this field.