A1 Journal article (refereed)
Co-precipitation of Mg-doped Ni0.8Co0.1Mn0.1(OH)2 : effect of magnesium doping and washing on the battery cell performance (2023)

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

JYU authors or editors

Publication details

All authors or editors: Laine, Petteri; Hietaniemi, Marianna; Välikangas, Juho; Kauppinen, Toni; Tynjälä, Pekka; Hu, Tao; Wang, Shubo; Singh, Harishchandra; Lassi, Ulla

Journal or series: Dalton Transactions

ISSN: 1477-9226

eISSN: 1477-9234

Publication year: 2023

Publication date: 04/01/2023

Volume: 52

Issue number: 5

Pages range: 1413-1424

Publisher: Royal Society of Chemistry

Publication country: United Kingdom

Publication language: English

DOI: https://doi.org/10.1039/D2DT02246J

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/85709

Additional information: This article is part of the themed collection: Nordic Collection.

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.

Keywords: lithium-ion batteries; electrodes; doping (semiconductor technology); magnesium; electrochemistry

Free keywords: co-precipitation; magnesium

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2023

JUFO rating: 1