Reuse of LiCoO2 Electrodes Collected from Spent Li-Ion Batteries after Electrochemical Re-Lithiation of the Electrode

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2021-06-08
Major/Subject
Mcode
Degree programme
Language
en
Pages
11
2434-2444
Series
ChemSusChem, Volume 14, issue 11
Abstract
The recycling of used Li-ion batteries is important as the consumption of batteries is increasing every year. However, the recycling of electrode materials is tedious and energy intensive with current methods, and part of the material is lost in the process. In this study, an alternative recycling method is presented to minimize the number of steps needed in the positive electrode recovery process. The electrochemical performance of aged and re-lithiated Mg−Ti-doped LiCoO2 and stoichiometric LiCoO2 was investigated and compared. The results showed that after re-lithiation the structure of original LiCoO2 was restored, the capacity of an aged LiCoO2 reverted close to the capacity of a fresh LiCoO2, and the material could thus be recovered. The re-lithiated Mg−Ti-doped LiCoO2 provided rate capability properties only slightly declined from the rate capability of a fresh material and showed promising cyclability in half-cells.
Description
Funding Information: This work made use of the Aalto University Otanano and RAMI infrastructures. The authors wish to thank Dr. Hannu Revitzer for performing the ICP‐OES and AAS measurements and Mr. Eldar Khabushev for assisting and partially performing the Raman measurements. The authors also thank Dr. Juho Välikangas and Mr. Tuomo Vähätiitto from University of Oulu for optimizing and preparing the pouch cells. Financial support from Academy of Finland, Strategic Research Council (the Profi 5 project) and Business Finland (the BatCircle project) is also greatly acknowledged. Publisher Copyright: © 2021 The Authors. ChemSusChem published by Wiley-VCH GmbH Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
Keywords
Doping, energy conversion, lithiation, lithium-ion batteries, renewable resources
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Citation
Lahtinen, K, Rautama, E L, Jiang, H, Räsänen, S & Kallio, T 2021, ' Reuse of LiCoO 2 Electrodes Collected from Spent Li-Ion Batteries after Electrochemical Re-Lithiation of the Electrode ', ChemSusChem, vol. 14, no. 11, pp. 2434-2444 . https://doi.org/10.1002/cssc.202100629