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  • Küçük Resim
    Öğe
    Nickel oxide decorated halloysite nanotubes as sulfur Host materials for lithium–sulfur batteries
    (2023) Elibol, Meltem Karaismailoğlu; Jiang, Lihong; Xie, Dongjiu; Cao, Sijia; Pan, Xuefeng; Härk, Eneli; Lu, Yan
    Lithium–sulfur batteries with high energy density still confront manychallenges, such as polysulfide dissolution, the large volume change of sulfur,and fast capacity fading in long-term cycling. Herein, a naturally abundantclay material, halloysite, is introduced as a sulfur host material in the cathodeof Li–S batteries. Nickel oxide nanoparticles are embedded into the halloysitenanotubes (NiO@Halloysite) by hydrothermal and calcination treatment toimprove the affinity of halloysite nanotubes to polysulfides. TheNiO@Halloysite composite loaded with sulfur (S/NiO@Halloysite) isemployed as the cathode of Li–S batteries, which combines the physicalconfinements of tubular halloysite particles and good chemical adsorptionability of NiO. The S/NiO@Halloysite electrode exhibits a high dischargecapacity of 1205.47 mAh g?1at 0.1 C. In addition, it demonstrates enhancedcycling stability, retaining?60% of initial capacity after 450 cycles at 0.5 C.The synthesized NiO@Halloysite can provide a promising prospect andvaluable insight into applying natural clay materials in Li–S batteries
  • [ 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.