Yazar "Elibol, Meltem Karaismailoglu" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • [ X ]
    Öğe
    Determination of characteristic properties of Co3O4 loaded LaFexAl12-xO19 hexaaluminates
    (Walter De Gruyter Gmbh, 2024) Elibol, Meltem Karaismailoglu
    Hexaaluminates are drawing attention due to their exceptional mechanical and thermal stability. They can be proposed for applications as catalysts or catalyst support materials in high-temperature reactions. In this study, various LaFexAl12-xO19 samples (x = 0.25, 0.5, 1, and 2) have been synthesized using the sol-gel method. Subsequently, these hexaaluminate samples were impregnated with cobalt oxide to form more active centers on the hexaaluminate support. The influence of the iron (Fe) content on the crystal structure, redox properties, and oxygen immobility has been investigated through X-ray diffraction, hydrogen temperature-programmed reduction, and oxygen temperature-programmed desorption techniques. Among the Co3O4@LaFexAl12-xO19 samples, those with x >= 1 exhibited a hexaaluminate crystalline structure, demonstrating a higher lattice oxygen mobility.
  • [ X ]
    Öğe
    Rational designing and prospecting iron-based compounds as efficient host materials for lithium-sulfur batteries
    (Elsevier, 2024) Xie, Dongjiu; Wu, Qingping; Elibol, Meltem Karaismailoglu; Jiang, Lihong; Lu, Yan
    Known for its high theoretical capacity and low cost, the commercialization of Li-S batteries is hindered by the notorious shuttle behavior of the intermediate lithium polysulfides in liquid electrolyte and the sluggish kinetics of the liquid-to-solid reaction. Recently, to improve the electrochemical performance, iron-based compounds with well-designed nano- structures have been developed and applied as host material for sulfur because they have strong chemisorption of polar polysulfide molecules and could reduce the nucleation energy of solid Li2S. 2 S. Here, we have reviewed the latest research progresses (in the last three years) of various iron-based compounds as sulfur host materials and prospected the designing principles of efficient host materials with multiple functionalities to address the issues in sulfur cathode.