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Title: A Four-Electron Sulfur Electrode Hosting a Cu2+/Cu+ Redox Charge Carrier

Journal Article · · Angewandte Chemie (International Edition)
 [1];  [1];  [2];  [1];  [1];  [1];  [1];  [2];  [3]; ORCiD logo [1]
  1. Oregon State Univ., Corvallis, OR (United States). Dept. of Chemistry
  2. Argonne National Laboratory, Lemont, IL (United States). X-ray Science Div., Advanced Photon Sources
  3. Argonne National Laboratory, Lemont, IL (United States). Chemical Sciences and Engineering Div.

Abstract The elemental sulfur electrode with Cu 2+ as the charge carrier gives a four‐electron sulfur electrode reaction through the sequential conversion of S↔CuS↔Cu 2 S. The Cu‐S redox‐ion electrode delivers a high specific capacity of 3044 mAh g −1 based on the sulfur mass or 609 mAh g −1 based on the mass of Cu 2 S, the completely discharged product, and displays an unprecedently high potential of sulfur/metal sulfide reduction at 0.5 V vs. SHE. The Cu‐S electrode also exhibits an extremely low extent of polarization of 0.05 V and an outstanding cycle number of 1200 cycles retaining 72 % of the initial capacity at 12.5 A g −1 . The remarkable utility of this Cu‐S cathode is further demonstrated in a hybrid cell that employs an Zn metal anode and an anion‐exchange membrane as the separator, which yields an average cell discharge voltage of 1.15 V, the half‐cell specific energy of 547 Wh kg −1 based on the mass of the Cu 2 S/carbon composite cathode, and stable cycling over 110 cycles.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); National Science Foundation (NSF); USDOE
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1574296
Alternate ID(s):
OSTI ID: 1545651
Journal Information:
Angewandte Chemie (International Edition), Vol. 58, Issue 36; ISSN 1433-7851
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 64 works
Citation information provided by
Web of Science

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Cited By (2)

Rechargeable Iron–Sulfur Battery without Polysulfide Shuttling journal September 2019
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Figures / Tables (3)