Asymmetric Li-Coated PEO–PVDF-co-HFP Membrane with Graphene Oxide as Next-Generation Gel Polymer Electrolytes for Li-Ion Batteries
Tleukenov Y.-T. Raiymbekov Y. Yegamkulov M. Nurpeissova A. Bakenov Z. Mukanova A.
December 2025Elsevier B.V.
Materialia
2025#44
The pursuit of safer and more efficient electrolytes is central to the development of next-generation lithium batteries. In this work, a hybrid gel polymer electrolyte (GPE) was engineered by combining poly(ethylene oxide) (PEO) with poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-co-HFP) and functionalized with graphene oxide (GO). The introduction of GO disrupted PEO crystallinity and enhanced segmental motion, yielding a fourfold increase in ionic conductivity compared to the pristine polymer matrix. At an optimal loading of 1.5 wt%, the GPE achieved 1.29 × 10⁻⁴ S·cm⁻¹ while maintaining structural integrity and interfacial stability. To further boost performance, a thin lithium coating was deposited on the GPE surface, promoting uniform ion flux and reducing interfacial resistance. When paired with ZnO–Zn₃N₂ thin-film anodes, the modified GPE delivered stable cycling with capacities of 350–370 mAh g⁻¹ and 264 mAh g⁻¹ retained after 200 cycles at 0.1C, alongside Coulombic efficiencies exceeding 97 %. These findings highlight a synergistic design strategy that combines nanofiller engineering with interfacial modification to advance solid-state and gel-based lithium batteries.
Gel-polymer electrolyte , Graphene oxide additive , Li coating , Lithium-ion battery , Thin film , ZnO-Zn3N2
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National Laboratory Astana, Nazarbayev University, Kabanbay Batyr Ave. 53, Astana, 010000, Kazakhstan
Nazarbayev University Research Administration, Nazarbayev University, Kabanbay Batyr Ave. 53, Astana, 010000, Kazakhstan
Institute of Batteries LLC, Kabanbay Batyr Ave. 53, Astana, 010000, Kazakhstan
Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Kabanbay Batyr Ave. 53, Astana, 010000, Kazakhstan
Institute of New Energy Technologies and Materials, Astana, 010000, Kazakhstan
National Laboratory Astana
Nazarbayev University Research Administration
Institute of Batteries LLC
Department of Chemical and Materials Engineering
Institute of New Energy Technologies and Materials
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