Work

Selective recovery of lithium from spent lithium iron phosphate batteries using oxidation pressure sulfuric acid leaching system

Year: 2022

Type: article

Abstract: Oxidation pressure leaching was proposed to selectively dissolve Li from spent LiFePO4 batteries in a stoichiometric sulfuric acid solution. Using O2 as an oxidant and stoichiometric sulfuric acid as leaching agent, above 97% of Li was leached into the solution, whereas more than 99% of Fe remained in the leaching residue, enabling a relatively low cost for one-step separation of Li and Fe. And then, by adjusting the pH of leachate, above 95% of Li was recovered in the form of the Li3PO4 product through iron removal and chemical precipitation of phosphate.

Source: Transactions of Nonferrous Metals Society of China

DOI: 10.1016/s1003-6326(22)65931-4

Authors: De-you WU, Dong-xing WANG, Zhi-qiang LIU, Shuai RAO, Kui-fang ZHANG

Institutions: Guangdong Academy of Sciences, State Key Laboratory of Rare Metal Separation and Comprehensive Utilization

Language: English

Topic: Extraction and Separation Processes

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Responsible consumption and production, Affordable and clean energy

Open Access status: diamond

Funders: National Natural Science Foundation of China, Natural Science Foundation of Guangdong Province, Guangdong Academy of Sciences, Science and Technology Planning Project of Guangdong Province