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

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Sulfur
electric batteries
Cathodes
sulfur
cathodes
Ions
Sulfides
Intercalation
Disulfides
Energy storage
Electrolytes
nonaqueous electrolytes
ions
disulfides
energy storage
intercalation
sulfides
valence
Oxidation-Reduction
Lithium-ion batteries

ASJC Scopus subject areas

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

Cite this

CoS2 as a sulfur redox-active cathode material for high-capacity nonaqueous Zn batteries. / Zhang, Ruixian; Pan, Chengsi; Nuzzo, Ralph G; Gewirth, Andrew A.

In: Journal of Physical Chemistry C, Vol. 123, No. 14, 11.04.2019, p. 8740-8745.

Research output: Contribution to journalArticle

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