Recovery and Reuse of Composite Cathode Binder in Lithium Ion Batteries.
| Autor: | Sarkar A; Department of Chemical Engineering, Columbia University, New York, NY 10027, USA.; Department of Chemistry and Biochemistry, Montclair State University, Montclair, NJ 07043, USA., May R; Department of Chemical Engineering, Columbia University, New York, NY 10027, USA., Ramesh S; Department of Chemical Engineering, Columbia University, New York, NY 10027, USA., Chang W; Department of Mechanical Engineering and Material Science, Princeton University, Princeton, NJ 08544, USA., Marbella LE; Department of Chemical Engineering, Columbia University, New York, NY 10027, USA. |
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| Jazyk: | angličtina |
| Zdroj: | ChemistryOpen [ChemistryOpen] 2021 May; Vol. 10 (5), pp. 545-552. |
| DOI: | 10.1002/open.202100060 |
| Abstrakt: | Here, we investigate the recovery and reuse of polyvinylidene fluoride (PVDF) binders from both homemade and commercial cathode films in Li ion batteries. We find that PVDF solubility depends on whether the polymer is an isolated powder or cast into a composite film. A mixture of tetrahydrofuran:N-methyl-2-pyrrolidone (THF : NMP, 50 : 50 v/v) at 90 °C delaminates composite cathodes from Al current collectors and yields pure PVDF as characterized by 1 H nuclear magnetic resonance (NMR), gel permeation chromatography (GPC), wide-angle X-ray scattering (WAXS), and scanning electron microscopy (SEM). PVDF recovered from Li ion cells post-cycling exhibits similar performance to pristine PVDF. These data suggest that PVDF can be extracted and reused during Li ion battery recycling while simultaneously eliminating the formation of HF etchants, providing an incentive for use in direct cathode recycling. (© 2021 The Authors. Published by Wiley-VCH GmbH.) |
| Databáze: | MEDLINE |
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