Lithium fluoride recovery from cathode material of spent lithium-ion battery

Recoveries of cobalt and lithium metals from spent lithium-ion batteries are very important for prevention of environmental pollution and alleviation of resource shortage. In this study, a hydrometallurgical route for the recovery of lithium fluoride was proposed. Lithium and cobalt could be first s...

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Bibliographic Details
Published in:RSC advances 2018-01, Vol.8 (16), p.899-8998
Main Authors: Zheng, Ying, Song, Wei, Mo, Wen-ting, Zhou, Lai, Liu, Jian-Wen
Format: Article
Language:English
Subjects:
Cathodes
Chemistry
Cobalt
Electrode materials
Fluorides
Formic acid
Hydrogen peroxide
Hydrogen storage
Leaching
Lithium
Lithium fluoride
Lithium-ion batteries
Materials recovery
Pollution abatement
Reaction kinetics
Rechargeable batteries
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Summary:Recoveries of cobalt and lithium metals from spent lithium-ion batteries are very important for prevention of environmental pollution and alleviation of resource shortage. In this study, a hydrometallurgical route for the recovery of lithium fluoride was proposed. Lithium and cobalt could be first selectively leached into solution using formic acid and hydrogen peroxide. By investigating the effects of leaching temperature, time, stoichiometric ratio, H 2 O 2 concentration and solid-to-liquid ratio, the leaching efficiency of Li and Co could reach 99.90% and 99.96%, respectively. Meanwhile, the evaluation of leaching kinetics and calculation of apparent activation energies revealed that the leaching process fitted chemical control satisfactorily. After further fractional precipitation, a high purity of 99.0% lithium fluoride could be finally obtained, thus achieving the effective recovery of spent material from the lithium-ion battery. Recoveries of cobalt and lithium metals from spent lithium-ion batteries are very important for prevention of environmental pollution and alleviation of resource shortage.
ISSN:2046-2069
2046-2069
DOI:10.1039/c8ra00061a