Details

Autor(en) / Beteiligte

• Zhang, Liling
• Dai, Gui
• Yu, Shoufu
• Ma, Chengjian
• Dai, Hailu
• Bi, Lei

Titel

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.