University of Oulu

Kauppinen, T., Laine, P., Välikangas, J., Tynjälä, P., Hu, T., Salminen, J., Lassi, U., ChemElectroChem 2023, 10, e202300265.

Co-precipitation of NCM 811 using recycled and purified manganese : effect of impurities on the battery cell performance

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Author: Kauppinen, Toni1,2; Laine, Petteri1; Välikangas, Juho1;
Organizations: 1University of Oulu, Research unit of Sustainable chemistry, P.O.Box, Oulu, 3000, 90014 Finland
2University of Jyvaskyla, Kokkola University Consortium Chydenius, Talonpojankatu 2B, 67100 Kokkola, Finland
3Boliden Kokkola, Sinkkiaukio 1, 67100 Kokkola, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 7 MB)
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Language: English
Published: John Wiley & Sons, 2023
Publish Date: 2023-08-04


Co-precipitation of NCM811 precursors and cathodes for lithium-ion batteries was carried out using recycled and purified manganese solution. In this paper, the aim is to study the role of the impurities in the co-precipitation step of NMC811 and further in the battery cell performance. Based on the results, cationic impurities (Ca, Zn, Mg, and Fe) are co-precipitated in the NMC811 precursors, as expected based on the thermodynamic considerations. The presence of these impurities was confirmed by several characterizations. Impurities did not affect the particle morphology or tap density of NMC811. Impurities had surprisingly minor effect on the cell performance. During the cycling, these cells provided good cyclability and high-capacity retention after 1100 cycles compared to reference samples.

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Series: ChemElectroChem
ISSN: 2196-0216
ISSN-E: 2196-0216
ISSN-L: 2196-0216
Volume: 10
Issue: 17
Article number: e202300265
DOI: 10.1002/celc.202300265
Type of Publication: A1 Journal article – refereed
Field of Science: 116 Chemical sciences
Funding: Authors acknowledge Business Finland for research funding 2021–2024 (University of Oulu, BATCircle2.0, No. 44612/31/2020).
Copyright information: © 2023 The Authors. ChemElectroChem published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.