University of Oulu

Välikangas, J., Laine, P., Hietaniemi, M. et al. Correlation of aluminum doping and lithiation temperature with electrochemical performance of LiNi₁-ₓAlₓO₂ cathode material. J Solid State Electrochem 27, 641–654 (2023).

Correlation of aluminum doping and lithiation temperature with electrochemical performance of LiNi₁-ₓAlₓO₂ cathode material

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Author: Välikangas, Juho1; Laine, Petteri1; Hietaniemi, Marianna1;
Organizations: 1Research Unit of Sustainable Chemistry, University of Oulu, P.O. Box 4000, 90014, Oulu, Finland
2Centre for Material Analysis, University of Oulu, P.O. Box 8000, 90014, Oulu, Finland
3University of Jyvaskyla, Kokkola University Consortium Chydenius, Talonpojankatu 2B, 67100, Kokkola, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 4.8 MB)
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Language: English
Published: Springer Nature, 2022
Publish Date: 2023-06-09


This article presents a process for producing LiNi₁-ₓAlₓO₂ (0 < × < 0.05) cathode material with high capacity and enhanced cycle properties of 145 mAh/g after 600 cycles. The LiNi₁-ₓAlₓO₂ (0 < × < 0.05) cathode material is prepared by mixing coprecipitated Ni(OH)₂ with LiOH and Al(OH)₃, followed by lithiation at temperature range of 650–710 °C, after which any residual lithium from lithiation is washed from the particle surfaces. Electrochemical performance was studied within full-cell and half-cell application; in addition, different material characterization methods were carried out to explain structure changes when certain amount of aluminum is introduced in the LiNi₁-ₓAlₓO₂ structure. Surface analyses were carried out to demonstrate how washing process changes the chemical environment of the LiNi₁-ₓAlₓO₂ secondary particle surface. The results demonstrate how Al doping, lithiation temperature, and the washing process affect the performance of the LiNi₁-ₓAlₓO₂ cathode material.

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Series: Journal of solid state electrochemistry
ISSN: 1432-8488
ISSN-E: 1433-0768
ISSN-L: 1432-8488
Volume: 27
Pages: 641 - 654
DOI: 10.1007/s10008-022-05356-y
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. The authors acknowledge Business Finland for research funding 2021–2024 (University of Oulu, BATCircle2.0, No. 44612/31/2020.
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