High-efficiency method for recycling lithium from spent LiFePO4 cathode

Yan Tingting; Zhong Shengwen; Zhou Miaomiao; Guo Xiaoming; Hu Jingwei; Wang Fangfang; Zeng Fantao; Zuo Sicheng

doi:10.1515/ntrev-2020-0119

Nanotechnology Reviews (Dec 2020)

High-efficiency method for recycling lithium from spent LiFePO4 cathode

Yan Tingting,
Zhong Shengwen,
Zhou Miaomiao,
Guo Xiaoming,
Hu Jingwei,
Wang Fangfang,
Zeng Fantao,
Zuo Sicheng

Affiliations

Yan Tingting: Jiangxi Key Laboratory of Power Batteries and Materials, School of Materials Science and Engineering, Jiangxi University of Sciences and Technology, Ganzhou, 341000, China
Zhong Shengwen: Jiangxi Key Laboratory of Power Batteries and Materials, School of Materials Science and Engineering, Jiangxi University of Sciences and Technology, Ganzhou, 341000, China
Zhou Miaomiao: Jiangxi Key Laboratory of Power Batteries and Materials, School of Materials Science and Engineering, Jiangxi University of Sciences and Technology, Ganzhou, 341000, China
Guo Xiaoming: Technical Research and Development Department, Ganzhou Huajing Rare Earth New Materials Co. LTD, Ganzhou, 341000, China
Hu Jingwei: Jiangxi Key Laboratory of Power Batteries and Materials, School of Materials Science and Engineering, Jiangxi University of Sciences and Technology, Ganzhou, 341000, China
Wang Fangfang: College of Chemical Engineering, Fuzhou University, Fuzhou, 350108, China
Zeng Fantao: Jiangxi Key Laboratory of Power Batteries and Materials, School of Materials Science and Engineering, Jiangxi University of Sciences and Technology, Ganzhou, 341000, China
Zuo Sicheng: Jiangxi Key Laboratory of Power Batteries and Materials, School of Materials Science and Engineering, Jiangxi University of Sciences and Technology, Ganzhou, 341000, China

DOI: https://doi.org/10.1515/ntrev-2020-0119
Journal volume & issue: Vol. 9, no. 1
pp. 1586 – 1593

Abstract

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The extraction of Li from the spent LiFePO4 cathode is enhanced by the selective removal using interactions between HCl and NaClO to dissolve the Li+ ion while Fe and P are retained in the structure. Several parameters, including the effects of dosage and drop acceleration of HCl and NaClO, reaction time, reaction temperature, and solid–liquid ratio on lithium leaching, were tested. The Total yields of lithium can achieve 97% after extraction process that lithium is extracted from the precipitated mother liquor, using an appropriate extraction agent that is a mixture of P507 and TBP and NF. The method also significantly reduced the use of acid and alkali, and the economic benefit of recycling is improved. Changes in composition, morphology, and structure of the material in the dissolution process are characterized by inductively coupled plasma optical emission spectrometry, scanning electron microscope, X-ray diffraction, particle size distribution instrument, and moisture analysis.

Published in Nanotechnology Reviews

ISSN: 2191-9089 (Print); 2191-9097 (Online)
Publisher: De Gruyter
Country of publisher: Poland
LCC subjects: Technology: Chemical technology; Science: Chemistry: Physical and theoretical chemistry
Website: https://www.degruyter.com/view/j/ntrev

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