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Benign solvents for recycling and re-use of a multi-layer battery pouch
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Marshall, Jean Elizabeth, Middleton, Bethany J., Gastol, Dominika E., Sommerville, Roberto, McElroy, Con Robert, Kendrick, Emma and Goodship, Vannessa (2022) Benign solvents for recycling and re-use of a multi-layer battery pouch. Materials Advances, 3 (12). pp. 4973-4981. doi:10.1039/D2MA00239F ISSN 2633-5409.
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Official URL: http://dx.doi.org/10.1039/D2MA00239F
Abstract
This article describes a process for the repair and re-use of an aluminium-containing pouch used as an outer casing for a Lithium-ion battery cell. As Lithium-ion batteries become more widespread, particularly with their increasing use in the automotive industry and in consumer electronics, recycling them is becoming an important challenge. Current recycling approaches for Li-ion batteries focus on reclamation of the high-value metals found in the electrodes. However, in order to minimise the environmental impact of the battery it would be optimal to be able to reclaim and re-use other components. Since many battery cells consist of an electrode stack held inside an outer pouch, we herein describe the structure of such a pouch and suggest methods for selectively stripping and repairing the inner layer, allowing the material to be re-used. We investigated the use of three different solvents (xylene, limonene, and 2,2,5,5-tetramethyloxolane) for the selective stripping of the polypropylene (PP) layer on the inner side of a pouch material. Each solvent was tested on both ‘pristine’ pouch material (as obtained from the manufacturer) and pouch material that had previously been part of a battery. For ‘used’ pouch material, the overall thickness of the film decreased from 150-160μm to 70-80 μm in under 1hr for all three solvents (corresponding to the removal of the PP layer), whereas for the ‘pristine’ pouch higher temperatures and longer times were required; this result is suggestive of some polymer degradation during the life of the pouch. Following the removal of the PP layer, virgin PP was subsequently added to renew the multi-layer structure.
Item Type: | Journal Article | ||||||||||||
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Subjects: | Q Science > QD Chemistry T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||||||||
Library of Congress Subject Headings (LCSH): | Lithium ion batteries , Lithium ion batteries -- Materials, Lithium ion batteries -- Recycling, Electrodes , Fuel cells -- Electrodes | ||||||||||||
Journal or Publication Title: | Materials Advances | ||||||||||||
Publisher: | Royal Society of Chemistry | ||||||||||||
ISSN: | 2633-5409 | ||||||||||||
Official Date: | 21 June 2022 | ||||||||||||
Dates: |
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Volume: | 3 | ||||||||||||
Number: | 12 | ||||||||||||
Page Range: | pp. 4973-4981 | ||||||||||||
DOI: | 10.1039/D2MA00239F | ||||||||||||
Status: | Peer Reviewed | ||||||||||||
Publication Status: | Published | ||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||
Date of first compliant deposit: | 13 May 2022 | ||||||||||||
Date of first compliant Open Access: | 16 May 2022 | ||||||||||||
RIOXX Funder/Project Grant: |
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