A new Sc-doped La0.5Sr0.5MnO3-δ cathode allows high performance for proton-conducting solid oxide fuel cells

Taking advantage of Li-evaporation in LiCoO2 as cathode for proton-conducting solid oxide fuel cells

“…The current energy and environmental problems require the development of sustainable technologies and devices [1][2][3][4][5], and solid oxide fuel cells (SOFCs) that can convert chemical energies into electricity receive considerable attention [6]. The traditional SOFCs have to work at high temperatures (above 800 ℃), reducing the lifetime of the fuel cells [7,8].…”

Razdvajanje faza u sustavu La0.5Sr0.5MnO3

“…1 Iako su LSMO materijali već dobro poznati kao katodni materijali u SOFC-u, Dai i sur. 8 su ih dodatno unaprijedili dopiranjem skandijem i ostvarili 75 % veću izlaznu snagu u odnosu na nedopirane LSMO katode kao i veću kemijsku stabilnost prema CO 2 i vodi. Povećanje udjela supstitucije u LSMO rezultira i porastom Curiejeve temperature iznad sobne, što omogućava njihovu primjenu kao radnih materijala u magnetskim hladnjacima.…”

“…22 uspješno su pripravili LaMnO 3 filmove kemijskom depozicijom iz parne faze primjenjujući tehniku laserskog injektiranja i dokazali visoke vrijednosti koeficijenata difuzije kisika za potencijalnu primjenu u SOFC. Budući da je dopiranje nužno za poboljšanje ostalih svojstava poput električne vodljivosti i kemijske stabilnosti, 8 bitno je istražiti mogu li se navedenim metodama dobiti jednofazni tanki filmovi dopiranih faza. Potencijalni problemi očituju se višestrukim fenomenima koji se pojavljuju prilikom formiranja tankih filmova, a to su isparavanje otapala, kvašenje podloge, nehomogenost smjese prekursora te teška kontrola nukleacije i rasta kristala.…”

BaTb0.3Fe0.7O3−δ: a new proton-conductor-derived cathode for proton-conducting solid oxide fuel cells

“…24 Although the advantages of H-SOFCs are apparent, the lowered working temperatures could lead to sluggish cathode kinetics, making developing proper cathode materials for H-SOFCs highly desirable. [25][26][27][28][29] Compared with traditional oxygen-ion conducting SOFCs, proton migrations are involved in the cathode reaction. [30][31][32] Therefore, the development of proton-conductive cathode materials has become the mainstream cathode design for H-SOFCs.…”

“…24 Although the advantages of H–SOFCs are apparent, the lowered working temperatures could lead to sluggish cathode kinetics, making developing proper cathode materials for H–SOFCs highly desirable. 25–29…”