Article (Scientific journals)
Direct NCA Cathode Active Materials Recycling from Spent Li-Ion Batteries: Solvent-Free Recovery and Healing by Heat Treatment
Oubaha, Hamid; Fkhar, Lahcen; Cloots, Rudi et al.
2024In ACS Sustainable Resource Management, 1 (8), p. 1791–1801
Peer reviewed
 

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Keywords :
Direct recycling; Cathode active materials; Lithium-ion batteries; Lithium nickel cobalt aluminum oxides; NCA; Regeneration
Abstract :
[en] The steadily growing lithium-ion batteries (LIBs) market brings the critical question of the future treatment of tremendous waste from end-of-life (EoL) LIBs. Therefore, recycling of EoL LIBs has become an urgent need to overcome the foreseen environmental and economic challenges. Herein, we propose a direct recycling process to regenerate NCA cathode active material (CAM) from spent LIBs. A gentle heat pretreatment at a low temperature is applied to facilitate the recovery of the CAMs. The cathode strips from EoL LIBs were subjected to two temperatures (150 or 250 °C) during a short time (2 h) to deactivate the strong bonding between the polyvinylidene difluoride binder and the Al current collector surface. Thus, the CAM is easily and fully reclaimed from the Al foil. Moreover, the developed procedure preserves the integrity of the NCA structure without any morphological changes. The full restoration of NCA-based CAM powder is successfully achieved through Li-replenishing using Li2CO3 under O2 atmosphere at different sintering temperatures (750 or 900 °C). The healed NCA CAMs demonstrate decent electrochemical performance including good cyclability and rate performance in NCA//Li half-cell and NCA//LTO full-cell configurations.
Disciplines :
Chemistry
Author, co-author :
Oubaha, Hamid  ;  Université de Liège - ULiège > Département de chimie (sciences) > GREEnMat
Fkhar, Lahcen  ;  Université de Liège - ULiège > Complex and Entangled Systems from Atoms to Materials (CESAM)
Cloots, Rudi  ;  Université de Liège - ULiège > Département de chimie (sciences) > GREEnMat
Boschini, Frédéric  ;  Université de Liège - ULiège > Département de chimie (sciences) > GREEnMat
Mahmoud, Abdelfattah  ;  Université de Liège - ULiège > Département de chimie (sciences) > GREEnMat
Language :
English
Title :
Direct NCA Cathode Active Materials Recycling from Spent Li-Ion Batteries: Solvent-Free Recovery and Healing by Heat Treatment
Publication date :
30 July 2024
Journal title :
ACS Sustainable Resource Management
ISSN :
2837-1445
eISSN :
2837-1445
Publisher :
American Chemical Society (ACS)
Volume :
1
Issue :
8
Pages :
1791–1801
Peer reviewed :
Peer reviewed
Name of the research project :
CISTEMEEC project - PNRR convention n° 8677
Funders :
EU - European Union
Walloon region
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since 22 August 2024

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