Simultaneous Hetero- and Isovalent Doping as the Strategy for Improving Transport Properties of Proton Conductors Based on BaLaInO4

Tarasova, N. A.; Галишева, А. О.; Анимица, И. Е.; Belova, Ksenia

doi:10.3390/ma14216240

Cited by 5 publications

(2 citation statements)

References 54 publications

(53 reference statements)

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“…The doped compositions based on a monolayer (n = 1) BaLaInO 4 composition can intercalate up to ~2 mol H 2 O per formula unit which is an order of magnitude higher than for acceptor-doped perovskites [ 34 , 35 ]. As previously shown, doped monolayer perovskites BaNdInO 4 [ 36 , 37 , 38 , 39 , 40 ], BaLaInO 4 [ 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 ] and SrLaInO 4 [ 49 , 50 , 51 , 52 , 53 ] are prospective ionic (oxygen-ionic and protonic) conductors. However, the acceptor doping in the A-sublattices of AA′BO 4 allows it to achieve higher conductivity values [ 34 , 35 ].…”

Section: Introductionmentioning

confidence: 91%

Novel High Conductive Ceramic Materials Based on Two-Layer Perovskite BaLa2In2O7

Tarasova

Галишева

Анимица

et al. 2022

IJMS

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The tasks of quality environmental improvement and the development of new energy sources are very relevant. Hydrogen-operating electrochemical devices are strongly needed innovative ceramic materials with target properties, one of which is a high level of proton conductivity. It this paper, the possibility of proton conductivity in acceptor-doped two-layer compositions based on BaLa2In2O7 was proved for the first time. It was proved that doping leads to an increase in conductivity values up to ⁓1.5 orders of magnitude. The most conductive is the BaLa1.9Sr0.1In2O6.95 composition which demonstrates protonic conductivity value 2 × 10–5 S/cm at 450 °C. The acceptor-doped two-layer perovskites is a novel prospective class of proton-conducting materials, and further modification of their composition opens up a new method for the design of electrochemical energy generation devices.

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Section: Introductionmentioning

confidence: 91%

Novel High Conductive Ceramic Materials Based on Two-Layer Perovskite BaLa2In2O7

Tarasova

Галишева

Анимица

et al. 2022

IJMS

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“…The protonic conductivities of these materials, such as BaNdInO 4 [28][29][30][31][32], SrLaInO 4 [33][34][35][36][37], BaNdScO 4 [38], BaLaInO 4 , is realized due to the possibility of dissociative water intercalation into the interlayer space of the layered structure. The monolayer barium-lanthanum indate BaLaInO 4 was described as a nearly pure proton conductor below 400 • C, and an increase in the conductivity values up to 1.5 orders of magnitude caused by heterovalent [39][40][41][42] and isovalent [43][44][45][46] doping was revealed. The two-layer composition BaLa 2 In 2 O 7 of this homologous series AA' n B n O 3n+1 was also described as a protonic conductor [47].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Hydration Processes and Ionic Conductivity of Novel Gadolinium-Doped Ceramic Materials Based on Layered Perovskite BaLa2In2O7 for Electrochemical Purposes

et al. 2022

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The search for novel highly effective materials with target properties for different electrochemical purposes is active for now. Ceramic materials with high levels of ionic conductivity can be applied as electrolytic materials in solid oxide fuel cells and in electrolyzers. Layered perovskites are a novel class of ionic conductors demonstrating almost-pure proton transportation at mid-temperatures. Gadolinium-doped ceramic materials based on layered perovskite BaLa2In2O7 were obtained and investigated for the first time in this study. The effect of the dopant concentrations on the hydration processes and on ionic conductivity was revealed. It was shown that compositions 0 ≤ x ≤ 0.15 of BaLa2–xGdxIn2O7 exhibited proton conductivity when under wet air and at mid-temperatures (lower than ~450 °C). Gadolinium doping led to an increase in the conductivity values up to an order of magnitude of ~0.5. The protonic conductivity of the most conductive composition BaLa1.85Gd0.15In2O7 was 2.7∙10−6 S/cm at 400 °C under wet air. The rare earth doping of layered perovskites is a prospective approach for the design of ceramics for electrochemical devices for energy applications.

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High-temperature transport properties of BaSn1−xScxO3−δ ceramic materials as promising electrolytes for protonic ceramic fuel cells

et al. 2022

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Protonic ceramic fuel cells (PCFCs) offer a convenient means for electrochemical conversion of chemical energy into electricity at intermediate temperatures with very high efficiency. Although BaCeO3- and BaZrO3-based complex oxides have been positioned as the most promising PCFC electrolytes, the design of new protonic conductors with improved properties is of paramount importance. Within the present work, we studied transport properties of scandium-doped barium stannate (Sc-doped BaSnO3). Our analysis included the fabrication of porous and dense BaSn1−xScxO3−δ ceramic materials (0 ⩽ x ⩽ 0.37), as well as a comprehensive analysis of their total, ionic, and electronic conductivities across all the experimental conditions realized under the PCFC operation: both air and hydrogen atmospheres with various water vapor partial pressures (p(H2O)), and a temperature range of 500–900 °C. This work reports on electrolyte domain boundaries of the undoped and doped BaSnO3 for the first time, revealing that pure BaSnO3 exhibits mixed ionic-electronic conduction behavior under both oxidizing and reducing conditions, while the Sc-doping results in the gradual improvement of ionic (including protonic) conductivity, extending the electrolyte domain boundaries towards reduced atmospheres. This latter property makes the heavily-doped BaSnO3 representatives attractive for PCFC applications.

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Simultaneous Hetero- and Isovalent Doping as the Strategy for Improving Transport Properties of Proton Conductors Based on BaLaInO4

Cited by 5 publications

References 54 publications

Novel High Conductive Ceramic Materials Based on Two-Layer Perovskite BaLa2In2O7

Novel High Conductive Ceramic Materials Based on Two-Layer Perovskite BaLa2In2O7

Synthesis, Hydration Processes and Ionic Conductivity of Novel Gadolinium-Doped Ceramic Materials Based on Layered Perovskite BaLa2In2O7 for Electrochemical Purposes

High-temperature transport properties of BaSn1−xScxO3−δ ceramic materials as promising electrolytes for protonic ceramic fuel cells

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