Direct recovery of degraded LiCoO2 cathode material from spent lithium-ion batteries Efficient impurity removal toward practical applications

Direct recovery of degraded LiCoO2 cathode material from spent lithium-ion batteries : Efficient impurity removal toward practical applications

Copyright © 2021 Elsevier Ltd. All rights reserved.

Bibliographische Detailangaben
Veröffentlicht in:Waste management (New York, N.Y.). - 1999. - 129(2021) vom: 15. Juni, Seite 85-94
1. Verfasser: Yang, Huimeng (VerfasserIn)
Weitere Verfasser: Deng, Bowen, Jing, Xiaoyun, Li, Wei, Wang, Dihua
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2021
Zugriff auf das übergeordnete Werk:Waste management (New York, N.Y.)
Schlagworte:Journal Article Cathode material Li-ion batteries Molten salts Recycling Regeneration Ions Lithium 9FN79X2M3F
Beschreibung
Zusammenfassung:Copyright © 2021 Elsevier Ltd. All rights reserved.
Regenerating cathode material from spent lithium-ion batteries (LIBs) permits an effective approach to resolve resource shortage and environmental pollution in the increasing battery industry. Directly renovating the spent cathode materials is a promising way, but it is still challenging to efficiently remove all of the complex impurities (such as binder, carbon black, graphite and current collectors) without destroying the material structure in the electrode. Herein, a facile strategy to directly remove these impurities and simultaneously repair the degraded LiCoO2 by a target healing method is reported. Specifically, by using an optimized molten salt system of LiOH-KOH (molar ratio of 3:7) where LiNO3 and O2 both serve as oxidants, the impurities can be completely removed, while the structure, composition and morphology of degraded LiCoO2 can be successfully repaired to commercial level based on a two-stage heating process (300 °C for 8 h and 500 °C for 16 h, respectively), resulting in a high recovery rate of approximately 100% for cathode material. More importantly, the regenerated LiCoO2 exhibits a high reversible capacity, good cycling stability and excellent rate capability, which are comparable with commercial LiCoO2. This work demonstrates an efficient approach to recycle and reuse advanced energy materials
Beschreibung:Date Completed 08.06.2021
Date Revised 08.06.2021
published: Print-Electronic
Citation Status MEDLINE
ISSN:1879-2456
DOI:10.1016/j.wasman.2021.04.052