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  4. Dynamic Impedance Spectroscopy of Nickel Hexacyanoferrate Thin Films
 
Zitierlink DOI
10.26092/elib/367
Verlagslink DOI
10.1002/celc.201900805

Dynamic Impedance Spectroscopy of Nickel Hexacyanoferrate Thin Films

Veröffentlichungsdatum
2019-10-31
Autoren
Erinmwingbovo, Collins  
Koster, Dominique  
Brogioli, Doriano  
La Mantia, Fabio  
Zusammenfassung
Dynamic multi-frequency analysis (DMFA) is capable of acquiring high-quality frequency response of electrochemical systems under non-stationary conditions in a broad range of frequencies. In this work, we used DMFA to study the kinetics of (de-)intercalation of univalent cations (Na+ and K+) in thin films of nickel hexacyanoferrate (NiHCF) during cyclic voltammetry. For this system, the classic stationary electrochemical impedance spectroscopy fails due to the instability of the oxidized form of NiHCF. We are showing that such spectra can be fitted with a physical model described by a simple two-step intercalation mechanism: an adsorption step followed by an insertion step. The extracted kinetic parameters are depending on the state of charge as well on the nature of the inserted cation.
Schlagwörter
NiHCF thin films

; 

dynamic impedance spectroscopy

; 

dynamic multi-frequency analysis (DMFA)

; 

intercalation mechanism

; 

multi-sine excitation
Institution
Universität Bremen  
Fachbereich
Fachbereich 04: Produktionstechnik, Maschinenbau & Verfahrenstechnik (FB 04)  
Dokumenttyp
Artikel/Aufsatz
Zeitschrift/Sammelwerk
ChemElectroChem  
Band
6
Heft
21
Startseite
5387
Endseite
5395
Seitenzahl
9
Zweitveröffentlichung
Nein
Sprache
Englisch
Dateien
Lade...
Vorschaubild
Name

celc.201900805(2)-1.pdf

Size

3.2 MB

Format

Adobe PDF

Checksum

(MD5):8e27e45c617576b5751e3ce5a48ab7c6

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