Simplified solvent extraction process for high-purity Ni/Co mixed solution for lithium–ion batteries

IF 2.3 4区工程技术 Q3 CHEMISTRY, MULTIDISCIPLINARY

Separation Science and Technology Pub Date : 2023-07-16 DOI:10.1080/01496395.2023.2232094

Gogwon Choe, Y. Lim, Younghyun Kim, Go-Gi Lee, Yong‐Tae Kim

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引用次数: 0

Abstract

ABSTRACT The demands for Ni-based raw materials increase as Ni–Co–Mn ternary cathode materials become the main axis of the battery industry. Conventional hydrometallurgical process to produce raw materials from Ni ore for battery application is as follows: (i) leaching of metal ions by acid, (ii) solvent extraction process to extract target metals, and (iii) crystallization process to produce final single-metal compound as powder products. The conventional solvent extraction process is a three-circuit process comprising impurity removal, Co extraction, and Ni extraction circuits. Unlike conventional process, in this work, we suggest a simplified two-circuit process to simultaneously extract Ni and Co to produce Ni/Co mixed solution for cathode material precursor production. Accordingly, the efficiency of site utilization can be maximized by reducing the investment cost for the manufacturing process and downsizing mixer-settler facilities. Further, eco-friendly effects such as reducing the consumption of titrants and cutting down the process costs and wastewater discharge can be realized.

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锂离子电池用高纯镍钴混合溶液的简化溶剂萃取工艺

随着Ni-Co-Mn三元正极材料成为电池工业的主轴，对镍基原材料的需求不断增加。从镍矿石中生产电池用原料的常规湿法冶金工艺是:(1)用酸浸出金属离子，(2)用溶剂萃取法提取目标金属，(3)用结晶法生产最终的单一金属化合物作为粉末产品。传统的溶剂萃取过程是一个三回路过程，包括杂质去除、Co萃取和Ni萃取回路。与传统工艺不同，本文提出了一种简化的双回路工艺，同时提取Ni和Co，制备Ni/Co混合溶液，用于正极材料前驱体的生产。因此，通过减少制造过程的投资成本和缩小混合-沉淀设施的规模，可以最大限度地提高场地利用效率。此外，还可以实现诸如减少滴定剂消耗、降低工艺成本和废水排放等环保效果。

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

Separation Science and Technology 工程技术-工程：化工

CiteScore

6.10

自引率

3.60%

发文量

131

审稿时长

5.7 months

期刊介绍： This international journal deals with fundamental and applied aspects of separation processes related to a number of fields. A wide range of topics are covered in the journal including adsorption, membranes, extraction, distillation, absorption, centrifugation, crystallization, precipitation, reactive separations, hybrid processes, continuous separations, carbon capture, flocculation and magnetic separations. The journal focuses on state of the art preparative separations and theoretical contributions to the field of separation science. Applications include environmental, energy, water, and biotechnology. The journal does not publish analytical separation papers unless they contain new fundamental contributions to the field of separation science.