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Core/shell structure nano-iron/iron carbide electrodes for rechargeable alkaline iron batteries
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Chemical Technology.
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Chemical Technology.
2017 (English)In: Journal of the Electrochemical Society, ISSN 0013-4651, E-ISSN 1945-7111, Vol. 164, no 7, A1665-A1672 p.Article in journal (Refereed) Published
Abstract [en]

In this work, we have studied a 2% copper substituted core shell type iron/iron carbide as a negative electrode for application in energy storage. The NanoFe-Fe3C-Cu delivered 367 mAh g−1 at ≈80% current efficiency, successfully running for over 300 cycles. The superior electrode kinetics and performance were assessed by rate capability, galvanostatic, potentiodynamic polarization measurements in 6 M KOH electrolyte and at ambient temperature. Ex-situ XRD characterizations and SEM images of both the fresh and used electrode surfaces show that nanoparticles were found to be still intact with negligible particle agglomeration. The electrodes have shown stable performances with low capacity decay, whereas sulfur dissolution from the additive Bi2S3 was found to decrease the charging efficiency with time. This core-shell type structured nano material is, consequently, an auspicious anode candidate in alkaline-metal/air and Ni-Fe battery systems.

Place, publisher, year, edition, pages
Electrochemical Society, 2017. Vol. 164, no 7, A1665-A1672 p.
Keyword [en]
Renewable Energy Integration, Metal-Sulfide Additives, Electrochemical Properties, Anode Materials, Impedance Spectroscopy, Storage Systems, Performance, Carbon, Nanoparticles, Nanocomposites
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-210003DOI: 10.1149/2.1431707jesISI: 000404397300042Scopus ID: 2-s2.0-85020553265OAI: oai:DiVA.org:kth-210003DiVA: diva2:1115992
Funder
Swedish Energy Agency
Note

QC 20170627

Available from: 2017-06-27 Created: 2017-06-27 Last updated: 2017-08-02Bibliographically approved

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CiteExportLink to record
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  • apa
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  • de-DE
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Output format
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