Lithium and cobalt extraction from LiCoO 2 assisted by p(VBPDA-co-FDA) copolymers in supercritical CO 2 .

Autor: Vauloup J; ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France., Bouilhac C; ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France. Electronic address: cecile.bouilhac@umontpellier.fr., Sougrati MT; ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France; RS2E, Réseau Français sur le Stockage Electrochimique de l'Energie, FR CNRS #3459, Amiens F-80039 Cedex 1, France., Stievano L; ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France; RS2E, Réseau Français sur le Stockage Electrochimique de l'Energie, FR CNRS #3459, Amiens F-80039 Cedex 1, France., Coppey N; SNAM, Viviez, France., Zitolo A; Synchrotron SOLEIL, 91192 Gif-sur-Yvette, France., Monconduit L; ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France; RS2E, Réseau Français sur le Stockage Electrochimique de l'Energie, FR CNRS #3459, Amiens F-80039 Cedex 1, France., Lacroix-Desmazes P; ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France. Electronic address: patrick.lacroix-desmazes@enscm.fr.
Jazyk: angličtina
Zdroj: Waste management (New York, N.Y.) [Waste Manag] 2024 May 30; Vol. 181, pp. 199-210. Date of Electronic Publication: 2024 Apr 20.
DOI: 10.1016/j.wasman.2024.03.018
Abstrakt: Supercritical CO 2 (scCO 2 ) extraction assisted by complexing copolymers is a promising process to recover valuable metals from lithium-ion batteries (LIBs). CO 2 , in addition to being non-toxic, abundant and non-flammable, allows an easy separation of metal-complexes from the extraction medium by depressurization, limiting the wastewater production. In this study, CO 2 -philic gradient copolymers bearing phosphonic diacid complexing groups (poly(vinylbenzylphosphonic diacid-co-1,1,2,2-tetrahydroperfluorodecylacrylate), p(VBPDA-co-FDA)) were synthesized for the extraction of lithium and cobalt from LiCoO 2 cathode material. Notably, the copolymer was able to play the triple role of leaching agent, complexing agent and surfactant. The proof of concept for leaching, complexation and extraction was achieved, using two different extraction systems. A first extraction system used aqueous hydrogen peroxide as reducing agent while it was replaced by ethanol in the second extraction system. The scCO 2 extraction conditions such as extraction time, temperature, functional copolymer concentration, and the presence of additives were optimized to improve the metals extraction from LiCoO 2 cathode material, leading to an extraction efficiency of Li and Co up to ca. 75 % at 60 °C and 250 bar.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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