Elemental sulfur-molybdenum disulfide composites for high-performance cathodes for Li–S batteries: the impact of interfacial structures on electrocatalytic anchoring of polysulfides

Vladimir P. Oleshko, Eddie Chang, Chad R. Snyder, Christopher L. Soles, Saya Takeuchi, Tristan S. Kleine, Philip T. Dirlam, Jeffrey Pyun

Research output: Contribution to journalArticlepeer-review

Abstract

Abstract: Enhanced cathodes for Li–S batteries with sulfur-MoS2 composites demonstrated recently are capable to extend cycle lifetimes up to 1000 cycles with 0.07% capacity decay per cycle and deliver reversible capacity up to 500 mAh/g at 5C. To understand the origins of such remarkable performance, we investigated in-depth the cathode structures and their transformations during cycling at various scales down to the atomic level. We show that 3D interfacial structures involving mechanically activated defective 2H-MoS2 particulates and aggregated conducting nanocarbons play a critical role in enabling to maintain cathode integrity, electrocatalytically bind Li2Sx polysulfides, and effectively reduce charge transfer resistance. Graphic Abstract: [Figure not available: see fulltext.].

Original languageEnglish (US)
Pages (from-to)261-271
Number of pages11
JournalMRS Communications
Volume11
Issue number3
DOIs
StatePublished - Jun 2021

ASJC Scopus subject areas

  • Materials Science(all)

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