CoS2 as a sulfur redox-active cathode material for high-capacity nonaqueous Zn batteries

Ruixian Zhang, Chengsi Pan, Ralph G. Nuzzo, Andrew A. Gewirth

Research output: Contribution to journalArticle

Abstract

Nonaqueous Zn-ion batteries are a promising candidate for a high-energy storage system to replace Li-ion batteries. Here, we report on CoS2 as a cathode material for Zn-ion batteries using nonaqueous electrolytes, one exhibiting a maximum capacity of 283 mAh/g. Compositional, valence state, and structural studies reveal Zn2+ de/intercalation mediated by reversible interconversions between 2S2- (sulfide) and S22- (disulfide) forms of sulfur, which is the first such known case operating in a multivalent system. Our findings suggest that anionic redox-active cathode materials offer considerable promise in realizing high capacities in multivalent batteries.

Original languageEnglish (US)
Pages (from-to)8740-8745
Number of pages6
JournalJournal of Physical Chemistry C
Volume123
Issue number14
DOIs
StatePublished - Apr 11 2019

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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