Browsing by Author "Karahan, Billur Deniz"
Now showing items 1-20 of 22
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Application of the Box–Behnken design in the response surface methodology for the precipitation of Ni/Ni oxalate composite anodes
Gülcan, Mehmet Feryat; Karahan, Billur Deniz; Keleş, Özgül (Springer Science and Business Media B.V., 2023)In this work, first, using the Box-Behnken method, the temperature, oxalic acid/nickel mole ratio, and stirring duration are optimized to maximize the precipitation efficiency of nickel oxalate. Then, ANOVA is used to study ... -
Biowaste valorization into valuable nanomaterials: Synthesis of green carbon nanodots and anode material for lithium-ion batteries from watermelon seeds
Ashraf, Humza; Karahan, Billur Deniz (Elsevier Ltd, 2024)In this study, a solid biowaste watermelon seed is introduced for the first time as an alternative precursor for the production of fluorescent carbon nanodots and nanostructured activated carbon. Firstly, the seeds are ... -
Carbon coated electric arc furnace dust prepared by one-pot pyrolysis: An efficient, low carbon footprint electrode material for lithium-ion batteries
Karahan, Billur Deniz (Elsevier Ltd, 2022)This work offers useful insights into the evaluation of the electric arc furnace dust in green energy applications by surface engineering. To produce low-carbon-footprint electrodes, for the first time in the open literature, ... -
Characterization and corrosion studies of ternary Zn−Ni−Sn alloys
Solmaz, Reyhan; Karahan, Billur Deniz (University of Science and Technology Beijing, 2020)Nine distinct zinc-nickel-tin films with different compositions have been galvanostatically electrodeposited. The films have been characterized by scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). ... -
Comparative study about differently structured transitional metal molybdates as negative electrodes for LIBs
Karahan, Billur Deniz (Sakarya University, 2020)The nanostructured materials represent the center of fundamental advances to design new era electrodes for high energy density batteries. Especially, one-dimensional nanomaterials are recognized as a solution due to their ... -
Corrosion behavior of Ni–Fe–Mo deposits obtained under different electrodeposition conditions
Solmaz, Reyhan; Karahan, Billur Deniz (Springer, 2021)Ternary Ni-Fe-Mo coatings have been proposed for anti-corrosion applications to replace chromium coating. To analyze the effects of deposition current and duration six different Ni-Fe-Mo films have been electrodeposited ... -
Designing carbon-supported Fe2O3 anodes for lithium ion batteries
Gülcan, Mehmet Feryat; Karahan, Billur Deniz (Springer, 2021)In this study, within the defined orthogonal array of Taguchi design, the hydrothermal process parameters have been optimized for fabricating the smallest particle sized iron oxide (Fe2O3) particles. The finest particle ... -
Effect of vinylene carbonate as electrolyte additive for Mn2O3/NiMnO3 anodes of lithium-ion batteries
Solmaz, Reyhan; Karahan, Billur Deniz (Springer Heidelberg, 2021)This study reports for the first time the production and characterization of Mn2O3/NiMnO3 (MO/NMO) powders by the hydrothermal method and the enhanced performance of this electrode upon the addition of 15 vol% vinylene ... -
Engineering self-standing Si-Mo-O based nanostructure arrays as anodes for new era lithium-ion batteries
Karahan, Billur Deniz; Amine, Khalil (Springer, 2019)For the first time, Si-Mo-O helices have been produced by the ion-assisted glancing angle electron beam co-evaporation of molybdenum oxide and silicon. Since the electron beam evaporation process forms metastable particles ... -
Fabrication of nickel manganese cobalt oxide (NMCO) anodes for lithium-ion batteries via hydrothermal process
Solmaz, Reyhan; Karahan, Billur Deniz; Keleş, Özgül (Springer, 2020)Nickel manganese cobalt oxide (NMCO) powders have been fabricated by hydrothermal method followed by a calcination. The present work reports for the first time in the open literature, the effects of ammonium fluoride (NH4F) ... -
Graphene for zirconia and titanium composites in dental implants: Significance and predictions
Özcan, Mutlu; Volpato, Claudia Angela Maziero; Hian, Lucas; Karahan, Billur Deniz; Cesar, Paulo Francisco (Springer Science and Business Media B.V., 2022)Purpose of Review: Graphene is introduced in dentistry as a material to be used in the fabrication or coating of dental implants due to its biocompatibility, ability to physically interact with biomolecules and very high ... -
Leaching of iron and chromium from an indigenous ferro chromium alloy via a rotary evaporator: Optimum conditions determination and kinetic analysis
Gülcan, Mehmet Feryat; Karahan, Billur Deniz; Gürmen, Sebahattin (Elsevier, 2020)In the leaching process of chromium-containing precursor hexavalent chromium may form, which provokes damages to environment and human health. As a solution, leaching the chromium containing precursor with sulphuric acid ... -
Modification of the Cu current collector by magnetron sputtering to improve the cycle performance of MxOy (M:Ni,Mn,Co) anodes for lithium ion batteries
Solmaz, Ramazan; Karahan, Billur Deniz (Elsevier Ltd, 2021)The present work reports a methodology to produce electrodes with superior performances for batteries. Herein, the fabrication of an anode material that is made of a ternary transition metal oxides (nickel-manganese-cobalt ... -
Molybdenum oxide and hybride films as anodes for lithium ion batteries
Karahan, Billur Deniz; Yağsı, Ceren; Keleş, Özgül (American Scientific Publishers, 2019)Scientists have been working to replace graphite, the state-of-art anode material, to improve battery performances. In this sense, transitional metals and their oxides become attractive due to their capacities, widespread ... -
Nickel-framed film with alternate layers of nickel and silicon for high performance lithium ion battery anodes
Karahan, Billur Deniz (Elsevier Science, 2020)The present work reports for the first time in the open literature the formation of 4-mu m thick film with alternate layers of nickel and silicon by the magnetron sputtering method. Of the two kinds of samples prepared, ... -
Porous, columnar shaped iron rich oxide synthesis for lithium-ion batteries from metallurgical grade, domestic, high carbon ferro-chromium alloys
Gülcan, Mehmet Feryat; Karahan, Billur Deniz; Gürmen, Sebahattin (Elsevier Ltd, 2022)With this article, first time in the open literature, the synthesis, and the characterization of an anode material from a domestic, intermediate product (i.e. ferrochromium alloy) have been carried out. The presented ... -
Rational fabrication of low carbon foot-print electrode materials for lithium-ion batteries from electric arc furnace dust via integrated hydrometallurgical process
Karahan, Billur Deniz (Elsevier Ltd, 2023)Transforming industrial waste into high-value-added products represents a new avenue in the field of material science. This paper puts forward a comprehensive example for future works which target fabricating low-carbon ... -
A study on the corrosion behavior of 7072/3004/7072 clad aluminum alloy in different media
Tunç, Irmak Doğan; Karahan, Billur Deniz; Keleş, Özgül (Springer, 2020)Cladding is an easy and economical method to design multifunctional aluminum structures with improved corrosion resistance, mechanical strength, and physical appearance. In this study, the electrochemical properties and ... -
Superlattice-structured films by magnetron sputtering as new era electrodes for advanced lithium-ion batteries
Keleş, Özgül; Karahan, Billur Deniz; Eryılmaz, Levent; Amine, Rachid; Abouimrane, Ali; Chen, Zonghai; Zuo, Xiaobing; Zhu, Zihua; Al-Hallaj, Said; Amine, Khalil (Elsevier, 2020)Sustaining a sound structure in Si-based anodes is extremely challenging because of the high volumetric expansion that occurs upon cycling. To maintain capacity retention during the cycling, there is a need for new designs ... -
Twisted nanocolumns for LIBs via phi-sweep method in ion assisted e-beam deposition
Karahan, Billur Deniz; Eryılmaz, Osman Levent; Amine, Khalil M.; Keleş, Özgül (Elsevier Science Sa, 2018)In this work, twisted nanostructured silicon-copper (with 19%at. copper) thin film is fabricated by glancing angle deposition phi-sweep process of ion beam assisted electron beam evaporation method. The thin film delivers ...
