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 editorsLaine, Petteri; Hietaniemi, Marianna; Välikangas, Juho; Kauppinen, Toni; Tynjälä, Pekka; Hu, Tao; Wang, Shubo; Singh, Harishchandra; Lassi, Ulla

Journal or seriesDalton Transactions

ISSN1477-9226

eISSN1477-9234

Publication year2023

Publication date04/01/2023

Volume52

Issue number5

Pages range1413-1424

PublisherRoyal Society of Chemistry

Publication countryUnited Kingdom

Publication languageEnglish

DOIhttps://doi.org/10.1039/D2DT02246J

Publication open accessOpenly available

Publication channel open accessPartially open access channel

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

Additional informationThis 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.


Keywordslithium-ion batterieselectrodesdoping (semiconductor technology)magnesiumelectrochemistry

Free keywordsco-precipitation; magnesium


Contributing organizations


Ministry reportingYes

Reporting Year2023

Preliminary JUFO rating1


Last updated on 2024-03-04 at 18:16