High-efficiency method for recycling lithium from spent LiFePO 4 cathode

Nanotechnology Reviews

article

Tingting Yan¹  Shengwen Zhong¹  Miaomiao Zhou¹  Xiaoming Guo²  Jingwei Hu¹  Fangfang Wang³  Fantao Zeng¹  Sicheng Zuo¹ 

[1] Jiangxi Key Laboratory of Power Batteries and Materials, School of Materials Science and Engineering, Jiangxi University of Sciences and Technology;Technical Research and Development Department;College of Chemical Engineering, Fuzhou University

关键词: LiFePO4;    Li recovery;    battery-grade Li2CO3;    extraction;   

DOI  :  10.1515/ntrev-2020-0119

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

The extraction of Li from the spent LiFePO 4 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.

【 授权许可】

CC BY