Extraction of organic solvents and preferential recovery of lithium from spent lithium-ion batteries by in-situ carbothermal reduction

IF 6.9 2区环境科学与生态学 Q1 ENGINEERING, CHEMICAL

Process Safety and Environmental Protection Pub Date : 2024-04-29 DOI:10.1016/j.psep.2024.04.133

Jian Zou , Ruihan Zhang , Yali Zhang , Linlin Chen , Yaoguo Huang , Xianfu Sun

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引用次数: 0

Abstract

The sorting of spent lithium-ion batteries is not complete, and the types of black powder obtained by crushing are complex, and it is difficult to recycle. In this study, dimethyl carbonate was used to extract the organic solvent cured in the black powder, and then the carbon in the black powder was combined with complex sulfate for in-situ thermal reduction and water leaching to extract Li preferentially from the black powder. The effects of extraction factors on the recovery of organic solvents and the variables on the preferential leaching of Li were systematically studied. The changes of mineral phase during roasting were analyzed by TG-DTG, XRD, XPS and SEM-EDS. After black powder was roasted at 550°C for 3 h under air atmosphere with the synergistic effect of C and inorganic salts, 85.87 % of lithium can be selectively leached at 25°C for 2 h. Li₂CO₃ with high purity can be obtained. This method provides a new idea for the recovery of spent lithium-ion batteries with complex components.

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通过原位碳热还原法提取有机溶剂并优先回收锂离子废电池中的锂

废旧锂离子电池的分选并不彻底，破碎后得到的黑粉种类复杂，难以回收利用。本研究采用碳酸二甲酯萃取黑粉中固化的有机溶剂，然后将黑粉中的碳与复合硫酸盐结合进行原位热还原和水浸出，优先从黑粉中提取锂。系统研究了萃取因素对有机溶剂回收率的影响以及锂优先浸出的变量。通过 TG-DTG、XRD、XPS 和 SEM-EDS 分析了焙烧过程中矿物相的变化。在 C 和无机盐的协同作用下，黑色粉末在 550°C 的空气环境下焙烧 3 小时后，可在 25°C 下选择性浸出 85.87% 的锂，浸出时间为 2 小时。可获得高纯度的 Li2CO3。该方法为回收成分复杂的废锂离子电池提供了新思路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Process Safety and Environmental Protection 环境科学-工程：化工

CiteScore

11.40

自引率

15.40%

发文量

929

审稿时长

8.0 months

期刊介绍： The Process Safety and Environmental Protection (PSEP) journal is a leading international publication that focuses on the publication of high-quality, original research papers in the field of engineering, specifically those related to the safety of industrial processes and environmental protection. The journal encourages submissions that present new developments in safety and environmental aspects, particularly those that show how research findings can be applied in process engineering design and practice. PSEP is particularly interested in research that brings fresh perspectives to established engineering principles, identifies unsolved problems, or suggests directions for future research. The journal also values contributions that push the boundaries of traditional engineering and welcomes multidisciplinary papers. PSEP's articles are abstracted and indexed by a range of databases and services, which helps to ensure that the journal's research is accessible and recognized in the academic and professional communities. These databases include ANTE, Chemical Abstracts, Chemical Hazards in Industry, Current Contents, Elsevier Engineering Information database, Pascal Francis, Web of Science, Scopus, Engineering Information Database EnCompass LIT (Elsevier), and INSPEC. This wide coverage facilitates the dissemination of the journal's content to a global audience interested in process safety and environmental engineering.