Synergistic interface design of Al2O3-coated NMC811 and graphitic-based pre-lithiated anodes for enhanced full-cell performance

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dc.contributor.authorDogan, Ebru
dc.contributor.authorWhba, Rawdah
dc.contributor.authorMoeez, Iqra
dc.contributor.authorChung, Kyung Yoon
dc.contributor.authorYilmaz, Ece Unur
dc.contributor.authorAltin, Emine
dc.contributor.authorAtes, Mehmet Nurullah
dc.date.accessioned2026-04-04T13:34:40Z
dc.date.available2026-04-04T13:34:40Z
dc.date.issued2026
dc.departmentİnönü Üniversitesi
dc.description.abstractThis study investigated aluminum oxide (Al2O3) surface coatings on lithium nickel manganese cobalt oxide (NMC811) cathodes using a wet chemical process based on ethanol-dissolved aluminum ethoxide (Al(OEt)3). Three coating concentrations, 1, 2, and 3 wt% Al precursor relative to the NMC811 mass, were synthesized and referred to as NMC811@AlO-1, NMC811@AlO-2, and NMC811@AlO-3, respectively. The workflow encompassed structural and surface characterizations of the coated samples, followed by electrochemical evaluation in half- and full-cell configurations. FTIR confirmed Al-O bond formation, while XRD and Raman spectroscopy verified that the NMC811 lattice structure remained unchanged after coating. Furthermore, transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (TEM-EDX) confirmed the successful deposition of the Al2O3 layer. Time-of-flight secondary ion mass spectrometry (ToF-SIMS) analysis revealed Al3+ ion diffusion into the grain interiors, indicating a potential impact on the electrochemical performance of the electrodes. Electrochemical tests showed that all the coated samples exhibited improved stability, with NMC811@AlO-3 (3 wt% coating) achieving the best capacity retention in half cells. In the second phase, full cells were formed using pre-lithiated graphite, graphene, and graphene oxide (GO) anodes, for which pre-lithiation conditions were optimized. Among all combinations, the NMC811@AlO-3/GO full cell demonstrated the highest initial discharge capacity (183 mAh g-1) and the best cycling retention (80.1% after 250 cycles at C/2). These results suggest that a 3 wt% Al2O3 coating, combined with a GO anode, provides the most promising pathway toward high-performance full-cell systems.
dc.description.sponsorshipInn niversitesi [FCD-2025-4263]
dc.description.sponsorshipThe authors would like to acknowledge the financial support of Inonu University under project number FCD-2025-4263.
dc.identifier.doi10.1039/d5se01604e
dc.identifier.endpage950
dc.identifier.issn2398-4902
dc.identifier.issue3
dc.identifier.scopus2-s2.0-105027838648
dc.identifier.scopusqualityN/A
dc.identifier.startpage931
dc.identifier.urihttps://doi.org/10.1039/d5se01604e
dc.identifier.urihttps://hdl.handle.net/11616/109307
dc.identifier.volume10
dc.identifier.wosWOS:001666091100001
dc.identifier.wosqualityQ2
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherRoyal Soc Chemistry
dc.relation.ispartofSustainable Energy & Fuels
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250329
dc.subjectAtomic Layer Deposition
dc.subjectAl2o3
dc.subjectCathodes
dc.subjectOxide
dc.titleSynergistic interface design of Al2O3-coated NMC811 and graphitic-based pre-lithiated anodes for enhanced full-cell performance
dc.typeArticle

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