Tuning Electrochemical Performance by Microstructural Optimization of the Nanocrystalline Functional Oxygen Electrode Layer for Solid Oxide Cells - Publikacja - MOST Wiedzy

Twoje konto

zaloguj

Wyszukiwarka

Tuning Electrochemical Performance by Microstructural Optimization of the Nanocrystalline Functional Oxygen Electrode Layer for Solid Oxide Cells

Abstrakt

Further development of solid oxide fuel cell (SOFC) oxygen electrodes can be achieved through improvements in oxygen electrode design by microstructure miniaturisation alongside nanomaterials implementation. In this work, improved electrochemical performance of an La0.6Sr0.4Co0.2Fe0.8O3-d (LSCF) cathode was achieved by the controlled modification of the La0.6Sr0.4CoO3-d (LSC) nanocrystalline interlayer introduced between a porous oxygen electrode and dense electrolyte. The evaluation was carried out for various LSC layer thicknesses, annealing temperatures, oxygen partial pressures, and temperatures, as well as subjected to long-term stability tests and evaluated in typical operating conditions in an intermediate temperature SOFC. Electrochemical impedance spectroscopy (EIS) and a distribution of relaxation times analysis (DRT) were performed to reveal the rate-limiting electrochemical processes that limit the overall electrode performance. The main processes with an impact on the electrode performance were the adsorption of gaseous oxygen O2, dissociation of O2, and charge transfer-diffusion (O2-). The introduction of a nanoporous and nanocrystalline interlayer with extended electrochemically active surface area accelerates the oxygen surface exchange kinetics and oxygen ion diffusions, reducing polarisation resistances. The polarisation resistance of the reference LSCF was lowered by one order of magnitude from 0.77Ω∙cm2 to 0.076 Ω∙cm2 at 600°C by the deposition of a 400 nm LSC interlayer at the interface. The developed electrode tested in the anode-supported fuel cell configuration showed a higher cell performance by 20% compared to the cell with the reference electrode. The maximum power density at 700°C reaches 675 and 820 mW∙cm-2 for the reference cell and the cell with the LSC interlayer, respectively. Ageing tests at 700°C under a high load of 1 A∙cm2 were performed.

Cytowania

  • 3

    CrossRef

  • 0

    Web of Science

  • 3

    Scopus

Autorzy (5)

Cytuj jako

Pełna treść

pobierz publikację
pobrano 0 razy
Wersja publikacji
Accepted albo Published Version
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1021/acsami.2c18951
Licencja
Copyright (2022 American Chemical Society)

Słowa kluczowe

Informacje szczegółowe

Kategoria:
Publikacja w czasopiśmie
Typ:
artykuły w czasopismach
Opublikowano w:
ACS Applied Materials & Interfaces nr 14, strony 57449 - 57459,
ISSN: 1944-8244
Język:
angielski
Rok wydania:
2022
Opis bibliograficzny:
Kamecki B., Cempura G., Jasiński P., Wang S., Molin S.: Tuning Electrochemical Performance by Microstructural Optimization of the Nanocrystalline Functional Oxygen Electrode Layer for Solid Oxide Cells// ACS Applied Materials & Interfaces -Vol. 14,iss. 51 (2022), s.57449-57459
DOI:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1021/acsami.2c18951
Źródła finansowania:
Weryfikacja:
Politechnika Gdańska

wyświetlono 38 razy

Publikacje, które mogą cię zainteresować

Improvement of Oxygen Electrode Performance of Intermediate Temperature Solid Oxide Cells by Spray Pyrolysis Deposited Active Layers

2021

Improved performance of LaNi0.6Fe0.4O3 solid oxide fuel cell cathode by application of a thin interface cathode functional layer

2017

High performance LaNi1-xCoxO3-δ (x = 0.4 to 0.7) infiltrated oxygen electrodes for reversible solid oxide cells

2017

Electrochemical properties of porous Sr0.86Ti0.65Fe0.35O3 oxygen electrodes in solid oxide cells: Impedance study of symmetrical electrodes

2019
Meta Tagi