921. Grain-resolved mapping of oxygen evolution activation on a Ni-superalloyČrtomir Donik, Luka Suhadolnik, Blaž Tomc, Anton Voronkin, Jon Ustarroz, Marjan Bele, Matjaž Godec, Nejc Hodnik, 2025, original scientific article Abstract: We report the first grain-resolved mapping of oxygen evolution reaction (OER) activation on a Ni-based superalloy using identicallocation EBSD, complemented by IL-SEM, IL-EDS, and SECCM. NiFe (oxy)hydroxide film formation and OER activity are strongly influenced by grain size and orientation, with (111)-oriented and smaller grains showing the highest activity. These findings reveal pronounced microstructure heterogeneity and establish IL-EBSD as a powerful tool for guiding the design of advanced electrocatalysts.
Keywords: Ni-superalloy, IL-SEM, IL-EDS, SECCM
Published in DiRROS: 10.10.2025; Views: 276; Downloads: 143
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928. Načrtovalske in gozdnogojitvene smernice ter ukrepi za gospodarjenje z gozdovi v hudourniških območjih za krepitev varovalne in zaščitne funkcije gozdov : poročilo izsledka 3.1.1Urša Vilhar, 2025, treatise, preliminary study, study Keywords: gozdnogospodarsko načrtovanje, gozdnogojitveno načrtovanje, hudourniki, hudourniška območja, usmeritve, priporočila
Published in DiRROS: 10.10.2025; Views: 263; Downloads: 75
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929. Določanje hudourniških območij v gozdovih ter njihova klasifikacija : poročilo Delovnega sklopa 2Erika Kozamernik, Aleksander Marinšek, Jože Papež, Jaša Saražin, Urša Vilhar, 2025, treatise, preliminary study, study Keywords: gozdovi, hudourniška območja, terminologija, metodologija, klasifikacija, določanje
Published in DiRROS: 10.10.2025; Views: 309; Downloads: 94
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930. Toward practical aluminum organic batteries featuring covalent organic frameworkOlivera Lužanin, Raquel Dantas, Ava Rajh, Urban Košir, Robert Dominko, Klemen Bučar, Matjaž Kavčič, Manuel Souto, Jan Bitenc, 2025, original scientific article Abstract: In recent years, Al metal organic batteries have attracted significant interest due to their promise of sustainability and high volumetric energy densities, while being based on abundant materials. However, many studies assess their performance with insufficient rigor, often emphasizing high capacity and power performance, as well as cycling stability at very high cycling rates. Herein, the feasibility of a highly stable β-ketoenamine-linked anthraquinone-based covalent organic framework (DAAQ-TFP-COF) for rechargeable Al batteries is reassessed. First, the influence of different voltage windows on electrochemical behavior in an ionic liquid electrolyte, identifying an optimal balance between capacity and stability, is investigated. Within the optimized voltage window of 0.5 to 2.0 V, DAAQ-TFP-COF achieves a capacity of 113.9 mAh g−1 at 50 mA g−1. To gain deeper insight into the charge storage mechanism, surface- and bulk-sensitive characterization techniques—energy-dispersive X-ray spectroscopy and X-ray Raman spectroscopy—confirming monovalent AlCl2+ as the main coordination species are employed. Finally, the compatibility of DAAQ-TFP-COF with more cost-effective amide-based Al electrolytes is evaluated. In butyramide-based electrolyte, the organic material exhibits stable performance and high Coulombic efficiency. Based on our findings, a realistic outlook on the key challenges that must be addressed to advance COF-based electrodes for future aluminum battery applications is provided.
Keywords: rechargable batteries, aluminum metal batteries, covalent organic framework
Published in DiRROS: 09.10.2025; Views: 266; Downloads: 124
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