Co-precipitation of Mg-doped Ni0.8Co0.1Mn0.1(OH)2 : effect of magnesium doping and washing on the battery cell performance
Laine, P., Hietaniemi, M., Välikangas, J., Kauppinen, T., Tynjälä, P., Hu, T., Wang, S., Singh, H., & Lassi, U. (2023). Co-precipitation of Mg-doped Ni0.8Co0.1Mn0.1(OH)2 : effect of magnesium doping and washing on the battery cell performance. Dalton Transactions, 52(5), 1413-1424. https://doi.org/10.1039/D2DT02246J
Published inDalton Transactions
Hu, Tao |
© The Royal Society of Chemistry 2023
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. ...
PublisherRoyal Society of Chemistry
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Additional information about fundingThe 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. ...
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