University of Oulu

Hietaniemi, M., Hu, T., Välikangas, J. et al. Effect of precursor particle size and morphology on lithiation of Ni0.6Mn0.2Co0.2(OH)2. J Appl Electrochem 51, 1545–1557 (2021).

Effect of precursor particle size and morphology on lithiation of Ni0.6Mn0.2Co0.2(OH)₂

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Author: Hietaniemi, Marianna1,2; Hu, Tao1; Välikangas, Juho1,2;
Organizations: 1Research Unit of Sustainable Chemistry, University of Oulu, P.O. BOX 4300, FI-90014, Oulu, Finland
2Unit of Applied Chemistry, University of Jyväskylä, Kokkola University Consortium Chydenius, Talonpojankatu 2B, 67100, Kokkola, Finland
3Umicore Finland Oy, P.O. BOX 101, 67101, Kokkola, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 2.7 MB)
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Language: English
Published: Springer Nature, 2021
Publish Date: 2021-08-17


In this paper, Ni0.6Mn0.2Co0.2(OH)₂ precursors with several different morphologies and particle sizes are mixed with Li₂CO₃ and heat treated for 5, 7.5 and 10 h. The effects of the precursor properties on the degree of lithiation, electrochemical properties and volumetric capacities of lithiated product are compared. Based on the characterization results, a small (3 μm), narrow span precursor can be lithiated in a short period of time (5 h) and has good initial discharge capacity (185 mA h g⁻¹) and capacity retention (93% for 55 cycles). In contrast, a large wide-span precursor requires over 10 h for full lithiation. A highly porous precursor can be lithiated faster than traditional large wide-span materials, and has low cation mixing and good crystallinity. However, the volumetric energy density of porous material is low after lithiation compared to the other tested materials. Capacity retention after washing correlated with crystallographic properties of the sample.

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Series: Journal of applied electrochemistry
ISSN: 0021-891X
ISSN-E: 1572-8838
ISSN-L: 0021-891X
Volume: 51
Pages: 1545 - 1557
DOI: 10.1007/s10800-021-01596-4
Type of Publication: A1 Journal article – refereed
Field of Science: 116 Chemical sciences
Funding: Open access funding provided by University of Oulu including Oulu University Hospital. Authors acknowledge Business Finland for research funding 2019-2021 (University of Oulu, BATCircle, Dnro 5877/31/2018).
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