Xuhui Zhu,Hamidreza Arandiyan,Xue Ma,Yuan Wang,Shun Yang
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引用次数: 0
Abstract
The surge in lithium-ion battery adoption has underscored the critical need for innovative recycling technologies, particularly for lithium iron phosphate (LiFePO4, LFP) cathodes, which dominate the market due to their safety and cost advantages. However, the thermally stable olivine structure of LFP presents formidable challenges for conventional pyrometallurgical recycling, resulting in excessive energy consumption to break down the LFP structure, substantial lithium loss, and diminished economic viability. Herein, we introduce a carbothermal shock process, synergistically enhanced by deep eutectic solvents composed of choline chloride (ChCl) and urea, to address these limitations. This ultrafast approach (∼20 s) overcomes the issue of insufficient contact in solid-solid reactions through the complete encapsulation of spent LFP by ChCl, effectively preventing Li volatilization during the short reaction time. The process yields high-purity Fe2P and Li3PO4, which are efficiently separated using magnetic methods, achieving high recovery efficiencies of Li (97.39%) and Fe (99.17%). Notably, the recovered Fe2P demonstrates enhanced catalytic performance in the alcoholysis of waste polyethylene terephthalate plastics, creating a synergistic valorization pathway. This effective method not only eliminates complex separation processes but also advances the circular economy, enabling high-value resource recovery for the lithium-ion battery ecosystem.
期刊介绍:
ACS Nano, published monthly, serves as an international forum for comprehensive articles on nanoscience and nanotechnology research at the intersections of chemistry, biology, materials science, physics, and engineering. The journal fosters communication among scientists in these communities, facilitating collaboration, new research opportunities, and advancements through discoveries. ACS Nano covers synthesis, assembly, characterization, theory, and simulation of nanostructures, nanobiotechnology, nanofabrication, methods and tools for nanoscience and nanotechnology, and self- and directed-assembly. Alongside original research articles, it offers thorough reviews, perspectives on cutting-edge research, and discussions envisioning the future of nanoscience and nanotechnology.