Enhancing lithium-sulfur battery performance through the integration of six-metal high entropy oxides

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2025-04-13 DOI:10.1016/j.matlet.2025.138580

Hassan Raza , Sana Ullah , Awais Akhtar , Ghulam Abbas Gohar , Idris Temitope Bello , Ali Raza , Arslan Ahmed

引用次数: 0

Abstract

Lithium sulfur (Li-S) batteries could provide high energy density for electric vehicles. Nonetheless, their uses are hindered by the shuttle effect and slow redox kinetics, necessitating multi-metal electrocatalysts. A novel high entropy oxide (Fe-HEO) is fabricated using MOF template with six metals and used as sulfur host and electrocatalyst. The Fe-HEO facilitated active sites for lithium polysulfides (LPS) anchoring and improved redox conversion kinetic. Thus, Fe-HEO@S exhibited a high discharge capacity (∼1264mAh g⁻¹ at 0.1C) and maintained ∼ 616mAh g⁻¹ after 500 cycles (1C) with smaller decay rate of 0.08 % per cycle. It also demonstrated exceptional rate capability (∼715mAh g⁻¹ at 2C) and 73 % reversibility. This work highlights the fabrication of six metal HEO and showcases the excellent electrochemical performance of Li-S batteries.

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive