Design of Active Hopping Sites via Trace Trivalent Cation in IT-SOFC Anode

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F25%3A00646311" target="_blank" >RIV/61389021:_____/25:00646311 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/1996-1073/18/16/4314" target="_blank" >https://www.mdpi.com/1996-1073/18/16/4314</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/en18164314" target="_blank" >10.3390/en18164314</a>

Result language

angličtina

Original language name

Design of Active Hopping Sites via Trace Trivalent Cation in IT-SOFC Anode

Original language description

Intermediate-temperature solid oxide fuel cells (IT-SOFCs) have attracted attention due to their potential to overcome the trade-off between the performance and lifetime of SOFC devices. However, the guiding principle for effective material design, which can reduce operating temperatures and overcome performance decreases caused by excessive overpotential on the anode surface, has not been clearly established. In the present work, we studied the reported Schottky anomaly, which has been observed exclusively in yttria-stabilized zirconia (YSZ). To investigate this phenomenon, a small amount (less than 1200 ppm) of trivalent cations (Rh3+ or Fe3+), chemically similar to Y3+ in Y2O3, was doped onto the YSZ surface in the anode layer. Then, the current density observed from the SOFC device at 973 K was found to be nine-times higher than the SOFC device with an undoped anode. The surface first-principles calculations in the present work indicate that this performance enhancement is caused by the delocalized electrons induced by trivalent cation doping in the vicinity of the three-phase boundary and the promotion of surface oxygen diffusion in YSZ. Based on all experimental data, the effective material design guiding principle was obtained for utilizing the unique physical property of YSZ for applications such as IT-SOFCs.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20501 - Materials engineering

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

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

Name of the periodical

Energies

ISSN

1996-1073

e-ISSN

1996-1073

Volume of the periodical

18

Issue of the periodical within the volume

16

Country of publishing house

CH - SWITZERLAND

Number of pages

22

Pages from-to

4314

UT code for WoS article

001557448400001

EID of the result in the Scopus database

2-s2.0-105014483934