Abstract: Numerical Prediction of Electrical Conductivity of Porous Composite Materials: LSM-YSZ Case Study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F22%3A43924521" target="_blank" >RIV/60461373:22310/22:43924521 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Abstract: Numerical Prediction of Electrical Conductivity of Porous Composite Materials: LSM-YSZ Case Study

Popis výsledku v původním jazyce

Composite of lanthanum strontium manganite and yttria-stabilized zirconia (LSM-YSZ) is the state-of-the-art oxygen electrode material in the solid oxide cells due to its excellent electro-catalytic properties and long lifespan. While the LSM is excellent electronic conductor and electro-catalyst, the content of ionically conductive YSZ increases the amount of electrochemically active sites, the triple phase boundary, thus increasing the overall electrode electro-catalytic performance. However, it also considerably lowers the total electrical conductivity. This applies for all ceramic-based composites. We developed a unique universal equivalent circuit network model for prediction of electrochemical properties of composite electrodes. A set of porous LSM-YSZ samples was prepared to attain the validation data for our model. The data included the impedance behavior of the samples with respect to their electrical conductivity and polarization resistance. The model showed good qualitative and quantitative agreement in terms of electrical conductivity prediction.

Název v anglickém jazyce

Abstract: Numerical Prediction of Electrical Conductivity of Porous Composite Materials: LSM-YSZ Case Study

Popis výsledku anglicky

Composite of lanthanum strontium manganite and yttria-stabilized zirconia (LSM-YSZ) is the state-of-the-art oxygen electrode material in the solid oxide cells due to its excellent electro-catalytic properties and long lifespan. While the LSM is excellent electronic conductor and electro-catalyst, the content of ionically conductive YSZ increases the amount of electrochemically active sites, the triple phase boundary, thus increasing the overall electrode electro-catalytic performance. However, it also considerably lowers the total electrical conductivity. This applies for all ceramic-based composites. We developed a unique universal equivalent circuit network model for prediction of electrochemical properties of composite electrodes. A set of porous LSM-YSZ samples was prepared to attain the validation data for our model. The data included the impedance behavior of the samples with respect to their electrical conductivity and polarization resistance. The model showed good qualitative and quantitative agreement in terms of electrical conductivity prediction.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů