Proceedings of MATSUS Spring 2024 Conference (MATSUS24)
DOI: https://doi.org/10.29363/nanoge.matsus.2024.207
Publication date: 18th December 2023
Lithium–sulfur (Li–S) batteries stand out as promising next-generation power systems due to their high energy density, cost-effectiveness, and environmental compatibility [1]. Nevertheless, these batteries are known to suffer from several drawbacks that impede their widespread use in commercial devices, such as the low conductivity of the sulfur cathode, irreversible polysulfide formation and shuttling, and sluggish kinetics [2]. Recently, it has been demonstrated that using binary metallic Prussian Blue Analogues (PBAs) as chemical precursors for obtaining transition-metal chalcogenophosphates (MPSx) is an interesting strategy to address many of the issues that sulfur batteries face. The electronic configuration of the metals in the precursor PBA and final MPSx proves pivotal in enhancing the interaction between the cathode and sulfide species, resulting in improved kinetics and reduced shuttling, accompanied by high sulfur utilization [3]. In the talk, I will delve into the application of the newly discovered high-entropy PBAs (HE-PBAs) [4] as chemical precursors for the preparation of MPSx materials, opening innovative pathways to materials with high electronic disorder. I will underscore the significance of varying degrees of disorder, achievable through meticulous control of the chemical composition of HE-PBAs, in the production of highly stable cathodes (and even anodes) with enhanced electrical performance. Additionally, I will demonstrate how the manipulation of particle properties, such as size, can have a role in shaping the kinetics of the battery.
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