Molecularly engineered bacterial biopolymer as multifunctional interfacial regulators for dendrite-free and stable aqueous zinc-ion batteries

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dc.contributor.authorAdhami, Sadaf
dc.contributor.authorBayram, Sinan
dc.contributor.authorCoskun, Sahin
dc.contributor.authorSonmezoglu, Savas
dc.contributor.authorYuksel, Recep
dc.date.accessioned2026-09-01T15:53:08Z
dc.date.available2026-09-01T15:53:08Z
dc.date.issued2026
dc.departmentBayburt Üniversitesi
dc.description.abstractAqueous zinc-ion batteries (ZIBs) are promising candidates for next-generation energy storage owing to their intrinsic safety, low cost, and high theoretical capacity. However, their practical application remains hindered by dendrite formation and parasitic side reactions such as hydrogen evolution reaction (HER), anode corrosion, and passivation. Herein, we introduce a sustainable and scalable strategy based on a bacterial eumelanin biopolymer (S2-20), synthesized via the oxidative metabolism of Pseudomonas aeruginosa with indole derivatives, and directly deposited onto Zn foil via spin coating. The S2-20 biopolymer provides a conformal, ion-permeable interface that simultaneously guides uniform Zn nucleation, enhances electrolyte wettability, and suppresses parasitic side reactions. Symmetric cells demonstrate significantly increased Zn2+ transference number (0.908), and prolonged cycling stability exceeding 1200 hat 1.0 mA cm-2 and 200 h under harsh conditions up to 20 mA cm-2. Full cells with V2O5 cathodes further confirm remarkable specific capacity (374 mAh g-1 at 1.0 A g-1) and capacity retention, maintaining 150.5 mAh g-1 after 2200 cycles at 1.0 A g-1. This work presents the first demonstration of a bacterial eumelanin biopolymer as a multifunctional interfacial stabilizer for Zn metal, offering a truly green, cost-effective, and scalable pathway toward safe and sustainable aqueous ZIBs.
dc.identifier.doi10.1016/j.est.2026.121076
dc.identifier.issn2352-152X
dc.identifier.issn2352-1538
dc.identifier.orcid0000-0002-2156-1566
dc.identifier.scopus2-s2.0-105035262792
dc.identifier.scopusqualityQ1
dc.identifier.urihttp://dx.doi.org/10.1016/j.est.2026.121076
dc.identifier.urihttps://hdl.handle.net/20.500.12403/8528
dc.identifier.volume153
dc.identifier.wosWOS:001693194000001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier
dc.relation.ispartofJournal of Energy Storage
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20260820
dc.subjectBiopolymer
dc.subjectInterface Engineering
dc.subjectAnode
dc.subjectZinc-Ion Batteries
dc.subjectEnergy Storage
dc.titleMolecularly engineered bacterial biopolymer as multifunctional interfacial regulators for dendrite-free and stable aqueous zinc-ion batteries
dc.typeArticle

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