Super-rapid and energy-saving recovery of spent lithium-ion batteries cathode by dual-functional low-melting mixture solvents

IF 4.3 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science Pub Date : 2025-07-03 DOI:10.1016/j.ces.2025.122156

Xuemin Jing , Pengli Zhang , Zhuojia Shi , Ziheng Dai , Jingfa Yang , Yutong Liu , Yongbo Tan , Yu Chen

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Abstract

Fast and energy-saving recovery of spent lithium-ion batteries (LIBs) cathode with high efficiency by green solvents is the key for sustainable and low-energy industrial applications. Here, we find that super-rapid and low-temperature recovery of LIBs NCM cathode could be achieved with high efficiency by novel dual-functional low-melting mixture solvents (LoMMSs). Results show that leaching efficiencies of Li, Co, Ni, and Mn at 40 °C for 4 h are 87.4 %, 83.0 %, 84.1 % and 78.3 %, respectively. This super-rapid and low-temperature efficiency could be ascribed to the dual functionalization of LoMMSs, namely redox reaction and coordination interaction. The redox reaction induced by the reducibility of acid component in LoMMSs weakens the metal-oxygen bonding force, and the coordination effect between the LoMMSs and metal ions promote the metal ions to detach from the crystal lattice, thus achieving rapid and efficient dissolution under low temperature.

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双功能低熔点混合溶剂超快速节能回收废锂离子电池正极

利用绿色溶剂高效、快速、节能地回收废旧锂离子电池正极是实现可持续低能耗工业应用的关键。本研究发现，新型双功能低熔点混合溶剂（LoMMSs）可以高效地实现LIBs - NCM阴极的超快速低温回收。结果表明：在40 °C条件下4 h， Li、Co、Ni和Mn的浸出效率分别为87.4% %、83.0 %、84.1 %和78.3% %。这种超高速的低温效率可归因于LoMMSs的双重功能化，即氧化还原反应和配位相互作用。LoMMSs中酸组分的可还原性引起的氧化还原反应削弱了金属-氧的结合力，LoMMSs与金属离子之间的配位效应促使金属离子脱离晶格，从而在低温下实现快速高效的溶解。

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来源期刊

Chemical Engineering Science 工程技术-工程：化工

CiteScore

7.50

自引率

8.50%

发文量

1025

审稿时长

50 days

期刊介绍： Chemical engineering enables the transformation of natural resources and energy into useful products for society. It draws on and applies natural sciences, mathematics and economics, and has developed fundamental engineering science that underpins the discipline. Chemical Engineering Science (CES) has been publishing papers on the fundamentals of chemical engineering since 1951. CES is the platform where the most significant advances in the discipline have ever since been published. Chemical Engineering Science has accompanied and sustained chemical engineering through its development into the vibrant and broad scientific discipline it is today.