Characterization of electrical conduction and nature of charge carriers in mixed and ionic conductors

Geffroy, Pierre-Marie; Pons, Aénor; Béchade, Emilie; Masson, Olivier; Fouletier, Jacques

doi:10.1016/j.jpowsour.2017.06.003

Cited by 12 publications

(11 citation statements)

References 54 publications

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“…Interestingly, on cooling below 300 • C, the unit cell parameter of Ba 0.9 La 0.1 Zr 0.25 Sn 0. 25 In 0.5 O 3−a increased and then decreased again. This effect can be explained as due to incorporation of residual water vapor present in synthetic air, and while H 2 O content is below 3 ppm, a constant gas flow on the order of 100 cm 3 min −1 supplied into the oven-chamber was enough for the sample to absorb relatively large quantity of water [45][46][47].…”

Section: Crystal Structure At Room and Elevated Temperaturesmentioning

confidence: 89%

“…0.13 mole of water per mole of material, corresponding to the Ba 0.9 La 0.1 Zr 0.25 Sn 0. 25 In 0.5 O 2.93 H 0.26 composition. For the material hydrated at 400 • C, the water content was found to be smaller, ca.…”

Section: Thermogravimetric Measurements and Presence Of Protonsmentioning

confidence: 99%

“…25 In 0.5 O 3−a oxide are presented. Notwithstanding that the chosen chemical composition is not characterized by a very high proton conductivity, it enabled us to observe the temperature-dependent transition from the single-fold to the two-fold relaxation kinetics associated to the appearance of the electronic hole-related conductivity.…”

Section: Coupled and Decoupled Diffusion Of Ionic Charge Carriersmentioning

confidence: 99%

“…25 In 0.5 O 3−a oxide can be obtained as a single phase, with no major impurities present in a wide range of temperatures (1200-1600 • C). Figure 1b shows an exemplary diffractogram recorded at room temperature (RT) of a sample after heat treatment at 1400 • C, together with the performed structural refinement.…”

Section: Crystal Structure At Room and Elevated Temperaturesmentioning

confidence: 99%

“…25 In 0.5 O 3−a material hydrated at 250 • C are shown in Figure 6a. TG measurements were accompanied by mass spectroscopy studies, and the recorded (relative) ionic current data of H 2 O-and CO 2 -related signals are presented in Figure 6b,c.…”

Section: Thermogravimetric Measurements and Presence Of Protonsmentioning

confidence: 99%

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Crystal Structure, Hydration, and Two-Fold/Single-Fold Diffusion Kinetics in Proton-Conducting Ba0.9La0.1Zr0.25Sn0.25In0.5O3−a Oxide

et al. 2018

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Abstract:In this work, hydration kinetics related to the incorporation of water into proton-conducting Ba 0.9 La 0.1 Zr 0.25 Sn 0.25 In 0.5 O 3−a perovskite-type oxide are presented, with a recorded transition on temperature from a single-fold to a two-fold behavior. This can be correlated with an appearance of the electronic hole component of the conductivity at high temperatures. The collected electrical conductivity relaxation data allowed to calculate chemical diffusion coefficient D and surface exchange reaction coefficient k, as well as respective activation energies of their changes on temperature. Presented results are supplemented with a systematic characterization of the structural properties of materials synthesized at different temperatures, amount of incorporated water after hydration in different conditions, influence of water content on the crystal structure, as well as electrical conductivity in dry, H 2 O-and D 2 O-containing air, which enabled to evaluate proton (deuterium) conductivity.

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Section: Crystal Structure At Room and Elevated Temperaturesmentioning

confidence: 89%

Section: Thermogravimetric Measurements and Presence Of Protonsmentioning

confidence: 99%

Section: Coupled and Decoupled Diffusion Of Ionic Charge Carriersmentioning

confidence: 99%

Section: Crystal Structure At Room and Elevated Temperaturesmentioning

confidence: 99%

Section: Thermogravimetric Measurements and Presence Of Protonsmentioning

confidence: 99%

See 3 more Smart Citations

Crystal Structure, Hydration, and Two-Fold/Single-Fold Diffusion Kinetics in Proton-Conducting Ba0.9La0.1Zr0.25Sn0.25In0.5O3−a Oxide

et al. 2018

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Associating and Tuning Sodium and Oxygen Mixed‐Ion Conduction in Niobium‐Based Perovskites

Gouget

Mauvy

Chung

et al. 2020

Adv Funct Materials

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Pure ionic conductors as solid‐state electrolytes are of high interest in electrochemical energy storage and conversion devices. They systematically involve only one ion as the charge carrier. The association of two mobile ionic species, one positively and the other negatively charged, in a specific network should strongly influence the total ion conduction. Nb5+‐ (4d0) and Ti4+‐based (3d0) derived‐perovskite frameworks containing Na+ and O2− as mobile species are investigated as mixed ion conductors by electrochemical impedance spectroscopy. The design of Na+ blocking layers via sandwiched pellet sintered by spark plasma sintering at high temperatures leads to quantified transport number of both ionic charge carriers tNa+ and tO2−. In the 350–700 °C temperature range, ionic conductivity can be tuned from major Na+ contribution (tNa+ = 88%) for NaNbO3 to pure O2− transport in NaNb0.9Ti0.1O2.95 phase. Such a Ti‐substitution is accompanied with a ≈100‐fold increase in the oxygen conductivity, approaching the best values for pure oxygen conductors in this temperature range. Besides the demonstration of tunable mixed ion conduction with quantifiable cationic and anionic contributions in a single solid‐state structure, a strategy is established from structural analysis to develop other architectures with improved mixed ionic conductivity.

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Mixed ionic-electronic conducting (MIEC) oxide ceramics for electrochemical applications

Devi

Singh

Song

2022

Advanced Ceramics for Versatile Interdisciplinary Applications

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Characterization of electrical conduction and nature of charge carriers in mixed and ionic conductors

Cited by 12 publications

References 54 publications

Crystal Structure, Hydration, and Two-Fold/Single-Fold Diffusion Kinetics in Proton-Conducting Ba0.9La0.1Zr0.25Sn0.25In0.5O3−a Oxide

Crystal Structure, Hydration, and Two-Fold/Single-Fold Diffusion Kinetics in Proton-Conducting Ba0.9La0.1Zr0.25Sn0.25In0.5O3−a Oxide

Associating and Tuning Sodium and Oxygen Mixed‐Ion Conduction in Niobium‐Based Perovskites

Mixed ionic-electronic conducting (MIEC) oxide ceramics for electrochemical applications

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