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BaTbFeO: a new proton-conductor-derived cathode for proton-conducting solid oxide fuel cells
Ist Teil von
Sustainable energy & fuels, 2022-09, Vol.6 (19), p.4375-4382
Erscheinungsjahr
2022
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
BaTbO
3
is a much less focused proton-conductor than the traditional BaCeO
3
-BaZrO
3
system due to its lower proton conductivity. However, the present study reveals that using BaTbO
3
as the parent material to form the new BaTb
0.3
Fe
0.7
O
3−
δ
(BTF) can boost the cathode performance for proton-conducting solid oxide fuel cells (H-SOFCs). Compared with the traditional Fe-doped BaZrO
3
(BZF), the electronic structure of BTF is regulated due to the presence of Tb
3+
and Tb
4+
, leading to more abundant oxygen vacancies and improved oxygen reduction reaction activities compared with BZF, which have been demonstrated by both experiments and first-principles calculations. The slightly decreased proton diffusion by using BaTbO
3
compared with BaZrO
3
is compensated by the greatly enhanced oxygen diffusion and surface exchange abilities, leading to a record-high performance for the BTF cathode compared with other proton conductor-derived cathodes for H-SOFCs.
BaTb
0.3
Fe
0.7
O
3−
δ
, a new proton-conductor-derived cathode, has been proposed as a cathode for proton-conducting solid oxide fuel cells with high performance.
Sprache
–
Identifikatoren
eISSN: 2398-4902
DOI: 10.1039/d2se00849a
Titel-ID: cdi_rsc_primary_d2se00849a
Format
–
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