Fe3+ and Al3+ removal by phosphate and hydroxide precipitation from synthetic NMC Li-ion battery leach solution
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2023-12-05
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en
Pages
12
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Scientific Reports, Volume 13, issue 1
Abstract
The removal of trivalent iron and aluminum was studied from synthetic Li-ion battery leach solution by phosphate and hydroxide precipitation (pH 2.5–4.25, t = 3 h, T = 60 °C). Phosphate precipitation exhibited both crystal nucleation initiation (pH 2 vs. pH 3) as well as complete (~ 99%) Fe and Al removal at lower pH compared to hydroxide precipitation (pH 3 vs. 3.5). The precipitation time of phosphate was shorter (40 min) than that of hydroxide precipitation (80 min). At pH 4 the loss of valuable metals (Li, Ni, Co) in the precipitate was negligible in the phosphate cake, whereas in the hydroxide process the co-precipitation was 4–5% for Li, Ni and Co. The filtration rate of phosphate precipitate was shown to be significantly faster. The presence of fluoride did not have any notable effect on phosphate precipitation, whereas in hydroxide precipitation, it potentially had a negative effect on aluminum extraction.Description
Funding Information: This research work has been supported by the Business Finland BatCircle2.0 project (Grant number 44886/31/2020), and the Academy of Finland’s RawMatTERS Finland Infrastructure (RAMI) based at Aalto University. Publisher Copyright: © 2023, The Author(s).
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Chernyaev, A, Zhang, J, Seisko, S, Louhi-Kultanen, M & Lundström, M 2023, ' Fe 3+ and Al 3+ removal by phosphate and hydroxide precipitation from synthetic NMC Li-ion battery leach solution ', Scientific Reports, vol. 13, no. 1, 21445 . https://doi.org/10.1038/s41598-023-48247-6