On the benefits of structured composite electrodes in solid oxide cells

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F23%3A43928052" target="_blank" >RIV/60461373:22310/23:43928052 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s00706-023-03139-3" target="_blank" >https://link.springer.com/article/10.1007/s00706-023-03139-3</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00706-023-03139-3" target="_blank" >10.1007/s00706-023-03139-3</a>

Jazyk výsledku

angličtina

Název v původním jazyce

On the benefits of structured composite electrodes in solid oxide cells

Popis výsledku v původním jazyce

Functional composites of electronic and ionic conductors are the backbone of oxygen and fuel electrodes in solid oxide cells. A typical oxygen electrode is fabricated from a lanthanum strontium manganite and yttria-stabilized zirconia (LSM-YSZ) composite, while the fuel electrode is based on a Ni-YSZ cermet. While the composite materials exhibit enhanced kinetic capabilities, the electron-conductive phases, i.e., LSM and Ni, exhibit high electrical conductivity. The goal of this study was to develop an electrode layout with enhanced performance by tailoring the benefits of both, the composites and the single-phase electron conductors, within individual electrodes. The electrodes were fabricated in a two-layer layout with different thicknesses by screen-printing: composite material layer, electron-conductive material. The results suggested that the presence of YSZ is essential in the entire electrode body of a fuel electrode for enhanced performance as it increases the triple phase boundary length, as well as mechanical stability by forming a scaffold for the Ni network. Hence, for the optimal performance a thick layer of Ni-YSZ composite is required. On the contrary, the optimal oxygen electrode requires only very thin layer of the composite, otherwise the presence of YSZ is retarding the electrode’s performance. Graphical abstract: [Figure not available: see fulltext.]. © 2023, The Author(s).

Název v anglickém jazyce

On the benefits of structured composite electrodes in solid oxide cells

Popis výsledku anglicky

Functional composites of electronic and ionic conductors are the backbone of oxygen and fuel electrodes in solid oxide cells. A typical oxygen electrode is fabricated from a lanthanum strontium manganite and yttria-stabilized zirconia (LSM-YSZ) composite, while the fuel electrode is based on a Ni-YSZ cermet. While the composite materials exhibit enhanced kinetic capabilities, the electron-conductive phases, i.e., LSM and Ni, exhibit high electrical conductivity. The goal of this study was to develop an electrode layout with enhanced performance by tailoring the benefits of both, the composites and the single-phase electron conductors, within individual electrodes. The electrodes were fabricated in a two-layer layout with different thicknesses by screen-printing: composite material layer, electron-conductive material. The results suggested that the presence of YSZ is essential in the entire electrode body of a fuel electrode for enhanced performance as it increases the triple phase boundary length, as well as mechanical stability by forming a scaffold for the Ni network. Hence, for the optimal performance a thick layer of Ni-YSZ composite is required. On the contrary, the optimal oxygen electrode requires only very thin layer of the composite, otherwise the presence of YSZ is retarding the electrode’s performance. Graphical abstract: [Figure not available: see fulltext.]. © 2023, The Author(s).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

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

Projekt

<a href="/cs/project/TK04030143" target="_blank" >TK04030143: Pokročilý reverzibilní systém pro výrobu vodíku a elektrické energie na bázi vysokoteplotní cely využívající pevných oxidů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

MONATSHEFTE FUR CHEMIE

ISSN

0026-9247

e-ISSN

1434-4475

Svazek periodika

Neuveden

Číslo periodika v rámci svazku

Listopad

Stát vydavatele periodika

AT - Rakouská republika

Počet stran výsledku

8

Strana od-do

—

Kód UT WoS článku

001107844600001

EID výsledku v databázi Scopus

2-s2.0-85177802946