Lignin–Chitosan Gel Polymer Electrolytes for Stable Zn Electrodeposition

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Almenara Perez, NaroaStockholms universitet,Institutionen för material- och miljökemi (MMK) (author)

Lignin–Chitosan Gel Polymer Electrolytes for Stable Zn Electrodeposition

Article/chapterEnglish2023

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2023-01-30
American Chemical Society (ACS),2023
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LIBRIS-ID:oai:DiVA.org:su-215695
https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-215695URI
https://doi.org/10.1021/acssuschemeng.2c05835DOI

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Language:English
Summary in:English

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Subject category:art swepub-publicationtype

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Electrochemical energy storage technologies offer means to transition toward a decarbonized society and carbon neutrality by 2050. Compared to conventional lithium-ion batteries, aqueous zinc-ion chemistries do not require scarce materials or toxic and flammable organic-based electrolytes to function, making them favorable contenders in the scenario of intensifying climate change and supply chain crisis. However, environmentally benign and bio-based materials are needed to substitute fossil-based battery materials. Accordingly, this work taps into the possibilities of lignin together with chitosan to form gel polymer electrolytes (GPEs) for zinc-ion chemistries. A simple fabrication process enabling free-standing sodium lignosulfonate–chitosan and micellar lignosulfonate–kraft lignin–chitosan GPEs with diameters exceeding 80 mm is developed. The GPEs combine tensile strength with ductility, reaching Young’s moduli of 55 ± 4 to 940 ± 63 MPa and elongations at break of 14.1 ± 0.2 to 43.9 ± 21.1%. Competitive ionic conductivities ranging from 3.8 to 18.6 mS cm–1 and electrochemical stability windows of up to +2.2 V vs Zn2+/Zn were observed. Given the improved interfacial adhesion of the GPEs with metallic Zn promoted by the anionic groups of the lignosulfonate, a stable cycling of the Zn anode is obtained. As a result, GPEs can operate at 5000 μA cm–2 with no short-circuit and Coulombic efficiencies above 99.7%, outperforming conventional separator–liquid electrolyte configurations such as the glass microfiber separator soaked into 2 M ZnSO4 aqueous electrolyte, which short-circuits after 100 μA cm–2. This work demonstrates the potential of underutilized biorefinery side-streams and marine waste as electrolytes in the battery field, opening new alternatives in the sustainable energy storage landscape beyond LIBs.

Subject headings and genre

NATURVETENSKAP Kemi Materialkemi hsv//swe
NATURAL SCIENCES Chemical Sciences Materials Chemistry hsv//eng
lignin
chitosan
bioeconomy
circular economy
gel polymer electrolyte
zinc-ion battery (ZIB)
zinc plating/stripping

Added entries (persons, corporate bodies, meetings, titles ...)

Gueret, RobinStockholms universitet,Institutionen för material- och miljökemi (MMK)(Swepub:su)rogu5385 (author)
Huertas-Alonso, Alberto José,1988-Stockholms universitet,Institutionen för material- och miljökemi (MMK)(Swepub:su)aljo5482 (author)
Thalakkale Veettil, Unnimaya,1998-Stockholms universitet,Institutionen för material- och miljökemi (MMK)(Swepub:su)unth4715 (author)
Sipponen, Mika H.Stockholms universitet,Institutionen för material- och miljökemi (MMK)(Swepub:su)misi6261 (author)
Lizundia, Erlantz (author)
Stockholms universitetInstitutionen för material- och miljökemi (MMK) (creator_code:org_t)

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In:ACS Sustainable Chemistry and Engineering: American Chemical Society (ACS)11:6, s. 2283-22942168-0485

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