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Title: Silver-Containing α-MnO2 Nanorods: Electrochemistry in Rechargeable Aqueous Zn-MnO2 Batteries

Journal Article · · Journal of the Electrochemical Society
ORCiD logo [1];  [1]; ORCiD logo [2]; ORCiD logo [3];  [2];  [2];  [2];  [2];  [3]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [5]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Energy Sciences Directorate
  2. Stony Brook Univ., Stony Brook, NY (United States). Dept. of Chemistry
  3. Stony Brook Univ., Stony Brook, NY (United States). Dept. of Materials Science and Chemical Engineering
  4. Brookhaven National Lab. (BNL), Upton, NY (United States). Energy Sciences Directorate; Stony Brook Univ., Stony Brook, NY (United States). Dept. of Chemistry and Dept. of Materials Science and Chemical Engineering
  5. Stony Brook Univ., Stony Brook, NY (United States). Dept. of Chemistry and Dept. of Materials Science and Chemical Engineering
+ Show Author Affiliations

The reduction and subsequent oxidation of silver hollandite nanorods, Ag1.5Mn8O16, were explored in aqueous ZnSO4 electrolyte for the first time. The impact of reduction on the electrodes was probed where images of recovered cathodes were collected to evaluate the changes in morphology, structural, and electrochemical properties as a function of varying potential. Ag metal particle formation upon reduction was observed on reduction through a reduction-displacement reaction as confirmed by SEM/EDS, XRD, and XAS results accompanied by a decrease in charge transfer impedance, as determined by electrochemical impedance spectroscopy. On charge, in contrast to the reduction/oxidation electrochemistry in non-aqueous media where irreversible formation of silver metal was observed, disappearance of the silver metal is observed indicating oxidation of the silver centers is facilitated in aqueous electrolyte.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Mesoscale Transport Properties (m2mt); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1575426
Report Number(s):
BNL-212371-2019-JAAM
Journal Information:
Journal of the Electrochemical Society, Vol. 166, Issue 15; ISSN 0013-4651
Publisher:
The Electrochemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 20 works
Citation information provided by
Web of Science

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