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

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

doi:10.1021/acs.jpcc.9b02142

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 journal › Article › peer-review

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 2S^2- (sulfide) and S₂^2- (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 language	English (US)
Pages (from-to)	8740-8745
Number of pages	6
Journal	Journal of Physical Chemistry C
Volume	123
Issue number	14
DOIs	https://doi.org/10.1021/acs.jpcc.9b02142
State	Published - Apr 11 2019

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
General Energy
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

Online availability

10.1021/acs.jpcc.9b02142

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Cite this

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title = "CoS2 as a sulfur redox-active cathode material for high-capacity nonaqueous Zn batteries",

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.",

author = "Ruixian Zhang and Chengsi Pan and Nuzzo, \{Ralph G.\} and Gewirth, \{Andrew A.\}",

note = "This work was supported as part of the Joint Center for Energy Storage Research (JCESR), an Energy Innovation Hub funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences. The characterization of materials was carried out in part in the Frederick Seitz Materials Research Laboratory Central Facilities, University of Illinois.",

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AU - Pan, Chengsi

AU - Nuzzo, Ralph G.

AU - Gewirth, Andrew A.

N1 - This work was supported as part of the Joint Center for Energy Storage Research (JCESR), an Energy Innovation Hub funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences. The characterization of materials was carried out in part in the Frederick Seitz Materials Research Laboratory Central Facilities, University of Illinois.

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Y1 - 2019/4/11

N2 - 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.

AB - 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.

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