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In-situ Formation of a Series of AgFeO2/γ-Fe2O3 Composites: Impact on Electrochemical Performance

Published online by Cambridge University Press:  08 January 2016

Jessica L. Durham ,
Kevin Kirshenbaum ,
Esther S. Takeuchi ,
Amy C. Marschilok  and
Kenneth J. Takeuchi
Jessica L. Durham
Affiliation:
Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, U.S.A.
Kevin Kirshenbaum
Affiliation:
Brookhaven National Laboratory, Upton, NY 11973-5000, U.S.A.
Esther S. Takeuchi*
Affiliation:
Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, U.S.A. Brookhaven National Laboratory, Upton, NY 11973-5000, U.S.A. Department of Materials Science and Engineering, Stony Brook University, Stony Brook, NY 11794-2275, U.S.A.
Amy C. Marschilok
Affiliation:
Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, U.S.A. Department of Materials Science and Engineering, Stony Brook University, Stony Brook, NY 11794-2275, U.S.A.
Kenneth J. Takeuchi*
Affiliation:
Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, U.S.A. Department of Materials Science and Engineering, Stony Brook University, Stony Brook, NY 11794-2275, U.S.A.
*
*corresponding author: kenneth.takeuchi.1@stonybrook.edu
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Abstract

A paradigm for the synthetic manipulation of composition and crystallite size of bimetallic composites via a low-temperature, aqueous co-precipitation technique employing non-stoichiometric ratios of starting materials, AgNO3 and Fe(NO3)3, is introduced. In-situ formation of composites containing crystalline silver ferrite, AgFeO2, and nanocrystalline maghemite, γ-Fe2O3 is demonstrated and established by Raman spectroscopic and X-ray absorption analyses. As a cathode, the lowest silver content composites exhibited profoundly improved electrochemical performance, with reversible capacities approximately 100% higher relative to stoichiometric AgFeO2, and demonstrate the lowest capacity fade.

Keywords

compositeenergy storageFe
Type
Articles
Information
MRS Advances , Volume 1 , Issue 6: Energy and Sustainability , 2016 , pp. 389 - 394
Copyright
Copyright © Materials Research Society 2016 

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References

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