University of Oulu

Laine, P., Hietaniemi, M., Välikangas, J., Kauppinen, T., Tynjälä, P., Hu, T., Wang, S., Singh, H., & Ulla, L. (2023). Co-precipitation of Mg-doped Ni 0.8 Co 0.1 Mn 0.1 (Oh) 2: Effect of magnesium doping and washing on the battery cell performance. Dalton Transactions, 10.1039.D2DT02246J. https://doi.org/10.1039/D2DT02246J

Co-precipitation of Mg-doped Ni0.8Co0.1Mn0.1(OH)₂ : effect of magnesium doping and washing on the battery cell performance

Saved in:
Author: Laine, Petteri1,2; Hietaniemi, Marianna1,3; Välikangas, Juho1;
Organizations: 1University of Oulu, Research Unit of Sustainable Chemistry, P.O. Box 3000, FI-90014 University of Oulu, Finland
2University of Jyvaskyla, Kokkola University Consortium Chydenius, Talonpojankatu 2B, FI-67100 Kokkola, Finland
3Umicore Finland Oy, FI-67100 Kokkola, Finland
4University of Oulu, Research Unit of Nano and Molecular Systems, P.O. Box 3000, FI-90014 University of Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 5.6 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe202301255726
Language: English
Published: Royal Society of Chemistry, 2023
Publish Date: 2023-01-25
Description:

Abstract

Co-precipitation of Ni0.8Co0.1Mn0.1(OH)₂ (NCM811) and Mg-doped (0.25 wt% and 0.5 wt%) NCM811 precursors is carried out from concentrated metal sulphate solutions. In this paper, the aim is to study the role of magnesium dopant in the co-precipitation step of NCM811, the cathode active material and further the Li-ion battery cell performance. Based on the results, magnesium was fully co-precipitated in the NCM811 precursors, as expected from thermodynamic calculations. The presence of magnesium in these precursors was also confirmed by several characterization methods and magnesium was evenly distributed in the sample. It was observed that tapped density decreased and surface area increased with an expected increase in Mg content. Surprisingly, Mg doping did not improve the cyclability of coin cells, due to the stable crystal structure of NCM811. However, a slight improvement in cyclability was seen in pouch cells after 1000 cycles. A washing effect was clearly seen in lattice parameters and washing also decreased the capacity retention after 62 cycles for all samples.

see all

Series: Dalton transactions
ISSN: 1477-9226
ISSN-E: 1477-9234
ISSN-L: 1477-9226
Issue: Online first
DOI: 10.1039/d2dt02246j
OADOI: https://oadoi.org/10.1039/d2dt02246j
Type of Publication: A1 Journal article – refereed
Field of Science: 116 Chemical sciences
Subjects:
Funding: The authors acknowledge Business Finland for the research funding 2021–2024 (University of Oulu, BATCircle2.0, Dnro 44612/31/2020). The authors also acknowledge Dr Graham King and Al Rahemtulla for their assistance in the Synchrotron X-ray measurements. Part of the research described in this work was performed at the Canadian Light Source, a national research facility of the University of Saskatchewan, which is supported by the Canada Foundation for Innovation (CFI), the Natural Sciences and Engineering Research Council (NSERC), the National Research Council (NRC), the Canadian Institutes of Health Research (CIHR), the Government of Saskatchewan, and the University of Saskatchewan.
Copyright information: © The Royal Society of Chemistry 2023. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
  https://creativecommons.org/licenses/by/3.0/