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Title: Electrochemical Reduction of a Spinel-Type Manganese Oxide Cathode in Aqueous Electrolytes with Ca2+ or Zn2+

Journal Article · · Journal of Physical Chemistry. C
 [1];  [2]; ORCiD logo [1];  [1];  [1];  [3];  [2];  [1];  [3];  [1];  [1]; ORCiD logo [1]
  1. Univ. of Illinois at Chicago, Chicago, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Univ. of Illinois at Chicago, Chicago, IL (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
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In this report, the feasibility of reversible Ca2+ or Zn2+ intercalation into a crystalline cubic spinel Mn2O4 cathode has been investigated using electrochemical methods in an aqueous electrolyte. A combination of synchrotron XRD and XANES studies identified the partial structural transformation from a cubic to a tetragonally distorted spinel Mn3O4, accompanied by the reduction of Mn4+ to Mn3+ and Mn2+ during discharge. TEM/EDX measurements confirmed that practically no Ca2+ was inserted upon discharge. However, non-negligible amounts of Zn were detected after Mn2O4 was reduced in the Zn2+ electrolyte, but through the formation of secondary phases that, in some cases, appeared adjacent to the surface of a cathode particle. Furthermore this report aims to identify bottlenecks in the application of manganese oxide cathodes paired with Ca or Zn metal anodes and to justify future efforts in designing prototype multivalent batteries.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1481175
Journal Information:
Journal of Physical Chemistry. C, Vol. 122, Issue 8; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 28 works
Citation information provided by
Web of Science

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Cited By (3)

Highly crystalline ramsdellite as a cathode material for near-neutral aqueous MnO 2 /Zn batteries journal January 2019
Progress in Rechargeable Aqueous Zinc- and Aluminum-Ion Battery Electrodes: Challenges and Outlook journal October 2018
Challenges and perspectives for manganese‐based oxides for advanced aqueous zinc‐ion batteries journal December 2019

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25 ENERGY STORAGE
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PDF
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