The Effect of Donor Doping on the Ionic (О2–, Н+) Transport in Novel Complex Oxides BaLaIn1 – xNbxO4 + x with the Ruddlesden–Popper Structure

Protonic Transport in Layered Perovskites BaLanInnO3n+1 (n = 1, 2) with Ruddlesden-Popper Structure

“…When n = 1, this formula can be represented as AA BO 4 , and the compositions with this formula are characterized by the monolayered perovskite-related structure. The family of proton-conducting oxides with this type of the structure was discovered several years ago, and it is represented by the matrix compositions SrLaInO 4 [24][25][26][27][28], BaLaInO 4 [29][30][31][32][33][34][35][36][37], BaNdInO 4 [38][39][40][41][42][43], BaNdScO 4 [44]. The symmetry of these compositions is lower than cubic, and it is orthorhombic or monoclinic depending on the combination of cations in the A and B sublattices.…”

Layered and hexagonal perovskites as novel classes of proton-conducting solid electrolytes. A focus review

“…The temperature dependencies of proton conductivity for doped compositions based on BaNdInO4 [40], BaNdScO4 [41], SrLaInO4 [42], BaLaInO4 [43,44,49].…”

“…Apart from Ca 2+ -ions, Sr 2+ -and Ba 2+ -ions were used as the acceptor dopants introduced in the La 3+ -sublattice of BaLaInO4 [43,45]. The ions Ti 4+ , Zr 4+ and Nb 5+ were used for the donor doping of the In 3+ -sublattice [44,46,48,49]. All doped compositions based on BaLaInO4 were characterized by the Pbca space group.…”

“…An increase in the unit cell volume can be obtained not only by the dopant radius term, but also by the dopant concentration term. The acceptor-doped Ba1+xLa1−xInO4−0.5x (0 ≤ x ≤ 0.15) [44] and donor-doped BaLaIn1−xTixO4+0.5x (0 ≤ x ≤ 0.15) [46], BaLaIn1−xNbxO4+x (0 ≤ x ≤ 0.10) [49] solid solutions were obtained. An increase in the dopant concentration led to an increase in both the unit cell volume and the proton concentration in the structure.…”