Functionality of Lanthanum, Neodymium, and Praseodymium Nickelates as Promising Electrode Systems for Proton-Conducting Electrolytes

Lyagaeva, Julia G.; Данилов, Н. А.; Gorshkov, M. Yu.; Vdovin, G. K.; Антонов, Б. Д.; Demin, A.; Medvedev, Dmitry

doi:10.1134/s1070427218040080

Cited by 17 publications

(5 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nevertheless, since the modification of the substrate is a promising direction for the EPD deposition of the films based on doped barium cerate, our further research will be aimed at finding materials for the functional layer of substrates to further reduce the interaction with the film. For example, in recent studies, it was shown that such materials can be layered praseodymium or neodymium nickelates codoped with barium [56,57]. In addition, it is of interest to modify the film composition itself by introducing a small amount of zirconium which would increase the stability of the film in atmospheres containing hydrocarbons and water vapor [58,59] and to introduce an excess of Ba in the initial composition [33] or partlly substitute Ba with other alkaline earth metals to reduce its evaporation [32].…”

Section: Resultsmentioning

confidence: 99%

Comparative Study of Electrophoretic Deposition of Doped BaCeO3-Based Films on La2NiO4+δ and La1.7Ba0.3NiO4+δ Cathode Substrates

et al. 2019

View full text Add to dashboard Cite

This paper presents the results of a comparative study of methods to prevent the loss of barium during the formation of thin-film proton-conducting electrolyte BaCe0.89Gd0.1Cu0.01O3−δ (BCGCuO) on La2NiO4+δ-based (LNO) cathode substrates by electrophoretic deposition (EPD). Three different methods of the BCGCuO film coating were considered: the formation of the BCGCuO electrolyte film without (1) and with a protective BaCeO3 (BCO) film (2) on the LNO electrode substrate and the formation of the BCGCuO electrolyte film on a modified La1.7Ba0.3NiO4+δ (LBNO) cathode substrate (3). After the cyclic EPD in six stages, the resulting BCGCuO film (6 μm) (1) on the LNO substrate was completely dense, but the scanning electron microscope (SEM) analysis revealed the absence of barium in the film caused by its intensive diffusion into the substrate and evaporation during the sintering. The BCO layer prevented the barium loss in the BCGCuO film (2); however, the protective film possessed a porous island structure, which resulted in the deterioration of the film’s conductivity. The use of the modified LBNO cathode also effectively prevented the loss of barium in the BCGCuO film (3). A BCGCuO film whose conductivity behavior most closely resembled that of the compacts was obtained by using this method which has strong potential for practical applications in solid oxide fuel cell (SOFC) technology.

show abstract

Section: Resultsmentioning

confidence: 99%

Comparative Study of Electrophoretic Deposition of Doped BaCeO3-Based Films on La2NiO4+δ and La1.7Ba0.3NiO4+δ Cathode Substrates

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Along with materials with the perovskite‐related structures, the complex oxides belonging to the Ruddlesden‐Popper phases are also considered as attractive electrodes for protonic‐conducting SOCs. For example, the Ln 2 NiO 4+δ ‐based materials (Ln = La, Pr, Nd) exhibit hydration capability, high chemical stability against the hydroxide and carbonate formation due to the absence (or reduced amount) of alkaline‐earth elements, quite low TEC values close to those of electrolytes, no meaningful pO 2 ‐induced chemical expansion, high electrical conductivity, and excellent electrochemical activity as a result of both high oxygen diffusion coefficients and surface exchange constants …”

Section: Functional Materials Of Proton‐conducting Socsmentioning

confidence: 99%

Gas Humidification Impact on the Properties and Performance of Perovskite‐Type Functional Materials in Proton‐Conducting Solid Oxide Cells

Wang

Medvedev

Shao

2018

Adv Funct Materials

103

View full text Add to dashboard Cite

Fuel cells and electrolysis cells as important types of energy conversiondevices can be divided into groups based on the electrolyte material. However, solid oxide cells (SOCs) based on conventional oxygen-ion conductors are limited by several issues, such as high operating temperature, the difficulty of hydrogen purification from water, and inferior stability. To avoid these problems, proton-conducting oxides are proposed as electrolytes for SOCs in electrolysis and fuel cell modes. Since water vapor partial pressure (pH 2 O) is one of the main parameters determining the proton concentration in proton-conducting oxides (characteristics of which can be either improved or deteriorated), the pH 2 O control is extremely important for the optimization of the devices' performance and stability. This review provides an overview of the research progresses made for proton-conducting SOCs, especially for the impact of gas humidification on the operability and performance. Fundamental understanding of the main processes in proton-conducting SOCs and design principles for the key components are summarized and discussed. The trends, challenges, and future directions that exist in this dynamic field are also pointed out. This review will inspire interest from various disciplines and provide some useful guidelines for future development of proton-conductor-based energy storage and conversion systems.

show abstract

“…[ 23 ] Since the perovskite‐type proton conductors usually show low thermal expansion coefficient (TEC), the cathode materials should also have relatively low TEC to ensure their good thermomechanical compatibility. [ 24–26 ] Single perovskite (SP) oxides have been broadly applied as the electrodes for O‐SOFCs. In particular, many cobalt‐based perovskite oxides exhibit superb mixed oxygen ionic and electronic conductivity and oxygen surface exchange kinetics, thus guaranteeing that they are excellent cathodes materials for ILT O‐SOFCs.…”

Section: Introductionmentioning

confidence: 99%

Building Ruddlesden–Popper and Single Perovskite Nanocomposites: A New Strategy to Develop High‐Performance Cathode for Protonic Ceramic Fuel Cells

Shi

et al. 2021

Small

View full text Add to dashboard Cite

Here a new strategy is unveiled to develop superior cathodes for protonic ceramic fuel cells (PCFCs) by the formation of Ruddlesden–Popper (RP)‐single perovskite (SP) nanocomposites. Materials with the nominal compositions of LaSrxCo1.5Fe1.5O10−δ (LSCFx, x = 2.0, 2.5, 2.6, 2.7, 2.8, and 3.0) are designed specifically. RP‐SP nanocomposites (x = 2.5, 2.6, 2.7, and 2.8), SP oxide (x = 2.0), and RP oxide (x = 3.0) are obtained through a facile one‐pot synthesis. A synergy is created between RP and SP in the nanocomposites, resulting in more favorable oxygen reduction activity compared to pure RP and SP oxides. More importantly, such synergy effectively enhances the proton conductivity of nanocomposites, consequently significantly improving the cathodic performance of PCFCs. Specifically, the area‐specific resistance of LSCF2.7 is only 40% of LSCF2.0 on BaZr0.1Ce0.7Y0.2O3−δ (BZCY172) electrolyte at 600 °C. Additionally, such synergy brings about a reduced thermal expansion coefficient of the nanocomposite, making it better compatible with BZCY172 electrolyte. Therefore, an anode‐supported PCFC with LSCF2.7 cathode and BZCY172 electrolyte brings an attractive peak power output of 391 mW cm−2 and excellent durability at 600 °C.

show abstract

Functionality of Lanthanum, Neodymium, and Praseodymium Nickelates as Promising Electrode Systems for Proton-Conducting Electrolytes

Cited by 17 publications

References 45 publications

Comparative Study of Electrophoretic Deposition of Doped BaCeO3-Based Films on La2NiO4+δ and La1.7Ba0.3NiO4+δ Cathode Substrates

Comparative Study of Electrophoretic Deposition of Doped BaCeO3-Based Films on La2NiO4+δ and La1.7Ba0.3NiO4+δ Cathode Substrates

Gas Humidification Impact on the Properties and Performance of Perovskite‐Type Functional Materials in Proton‐Conducting Solid Oxide Cells

Building Ruddlesden–Popper and Single Perovskite Nanocomposites: A New Strategy to Develop High‐Performance Cathode for Protonic Ceramic Fuel Cells

Contact Info

Product

Resources

About