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A NOVEL CLOSED LOOP PROCESS FOR RECYCLING SPENT Li-ION BATTERY CATHODE MATERIALS
International Journal of Green Energy ( IF 3.3 ) Pub Date : 2021-07-10 , DOI: 10.1080/15435075.2021.1914631
Joey Chung-Yen Jung 1 , Norman Chow 2 , Anca Nacu 3 , Mariam Melashvili 3 , Alex Cao 3 , Luka Khorbaladze 3 , Zarko Meseldzija 4 , Jay Pang-Chieh Sui 5 , Jiujun Zhang 1
Affiliation  

ABSTRACT

Hydrometallurgical recycling of spent lithium cathode material commonly uses sodium hydroxide (NaOH) and sodium carbonate (Na2CO3) as reagents for impurity removal, metal extraction, and lithium recovery, which results a final processing solution containing high concentration of Na+ that needs to be treated before discharge or reuse. The present study reports the development of a novel closed-loop hydrometallurgical recycling of spent lithium cathode material process by adapting lithium hydroxide (LiOH) or lithium carbonate (Li2CO3) to replace in impurity removal and metal extraction, as well as using a three-compartment electrodialysis cell to regenerate LiOH and sulfuric acid (H2SO4) in recovering lithium. The regenerated LiOH and H2SO4 can be reused in the hydrometallurgical recycling process, making this a closed-loop process. Three different scales are studied to understand the reaction kinetics: 1-l batch, 40-l batch, and 73-l continuous batch. With LiOH as a reagent, impurities, such as Al and Fe, can be removed at pH 4.0–5.5. Metal extraction of Ni, Co, and Mn as carbonate or hydroxide can be achieved at pH 8–10. Up to 0.9 M of LiOH can be generated with a three-compartment electrodialysis cell with a 78% current efficiency. The proposed closed-loop hydrometallurgical process reduces costs through reagent regeneration, offering economic attractiveness, and provides an environmentally friendlier approach to recycling spent lithium-ion battery cathode material.



中文翻译:

一种用于回收废锂离子电池阴极材料的新型闭环工艺

摘要

废锂正极材料湿法冶金回收常用氢氧化钠(N一种H) 和碳酸钠 (N一种2C3) 作为杂质去除、金属提取和锂回收的试剂,最终处理溶液中含有高浓度的 N一种+ 在排放或再利用前需要进行处理。本研究报告了通过采用氢氧化锂开发了一种新型闭环湿法冶金废锂正极材料回收工艺。一世H) 或碳酸锂 (一世2C3) 取代杂质去除和金属提取,以及使用三室电渗析池进行再生 一世H 和硫酸(H24) 回收锂。重生的一世HH24 可以在湿法冶金回收过程中重复使用,使其成为一个闭环过程。研究了三种不同的规模以了解反应动力学:1-l 批次、40-l 批次和 73-l 连续批次。和一世H 作为试剂,Al 和 Fe 等杂质可以在 pH 4.0-5.5 范围内去除。可以在 pH 8-10 下以碳酸盐或氢氧化物形式提取 Ni、Co 和 Mn。高达 0.9 M一世H 可以用电流效率为 78% 的三室电渗析池产生。所提出的闭环湿法冶金工艺通过试剂再生降低了成本,提供了经济吸引力,并提供了一种更环保的回收废锂离子电池阴极材料的方法。

更新日期:2021-07-10
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