Electrochemical Behaviors for Ag, LSCF and BSCF as Oxygen Electrodes for Proton Conducting IT-SOFC

Sun, Shichen; Cheng, Zhe

doi:10.1149/2.0121710jes

Cited by 65 publications

(51 citation statements)

References 34 publications

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“…The same electrode exhibited different electrochemical activities when they were fabricated on the oxygen‐ionic and proton‐conducting electrolytes, which came from the distinctive elementary reactions realized in the electrode/electrolyte systems as shown in Table 5 and Figure . From the viewpoint of overall electrochemical reactions, Equations and highlighted the above‐mentioned differences of these systems:

For {normalO}^{2 -} electrolytes : {normalO}_{2} + 2 {normalV}_{normalO}^{• •} + 4 {normale}^{/} ⇄ 2 {normalO}_{normalO}^{x}

For {normalH}^{+} electrolytes : {normalO}_{2} + 4 {OH}_{normalO}^{•} + 4 {normale}^{/} ⇄ 4 {normalO}_{normalO}^{x} + 2 {normalH}_{2} O

…”

Section: Functional Materials Of Proton‐conducting Socsmentioning

confidence: 98%

“…Schematic representation of possible reactions for SOFCs based on different electrodes and pure oxygen‐ionic (a) and proton‐conducting (b) electrolytes. All panels reproduced with permission . Copyright 2017, The Electrochemical Society.…”

Section: Functional Materials Of Proton‐conducting Socsmentioning

confidence: 99%

“…The BSCF electrode was also compared with other oxygen electrodes such as Ag, LSFC, and LSFC–BCZYYb . The authors performed the experiments at the same condition ( T = 450–650 °C, pH 2 O = 5 × 10 −6 , 0.03–0.30 atm) and proposed possible mechanisms for all the four electrodes (Figure ).…”

Section: Functional Materials Of Proton‐conducting Socsmentioning

confidence: 99%

“…The addition of BCZYYb to LSFC phase resulted in an extension of TPB area. BSCF was identified as the more suitable oxygen electrode for proton‐conducting SOCs owing to lowest R p values in both dry and wet atmospheres ( Figure ) …”

Section: Functional Materials Of Proton‐conducting Socsmentioning

confidence: 99%

“…Impedance spectra for the symmetrical cells in dry simulated air (20%O 2 /N 2 with <5 ppm H 2 O and CO 2 ) versus simulated air humidified with various concentrations of moisture at 450 °C in the case of the electrodes of a) Ag, b) LSFC, c) LSFC–BCZYYb, and d) BSCF. All panels reproduced with permission . Copyright 2017, The Electrochemical Society.…”

Section: Functional Materials Of Proton‐conducting Socsmentioning

confidence: 99%

See 4 more Smart Citations

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

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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.

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For {normalO}^{2 -} electrolytes : {normalO}_{2} + 2 {normalV}_{normalO}^{• •} + 4 {normale}^{/} ⇄ 2 {normalO}_{normalO}^{x}

For {normalH}^{+} electrolytes : {normalO}_{2} + 4 {OH}_{normalO}^{•} + 4 {normale}^{/} ⇄ 4 {normalO}_{normalO}^{x} + 2 {normalH}_{2} O

…”

Section: Functional Materials Of Proton‐conducting Socsmentioning

confidence: 98%

Section: Functional Materials Of Proton‐conducting Socsmentioning

confidence: 99%

Section: Functional Materials Of Proton‐conducting Socsmentioning

confidence: 99%

Section: Functional Materials Of Proton‐conducting Socsmentioning

confidence: 99%

Section: Functional Materials Of Proton‐conducting Socsmentioning

confidence: 99%

See 3 more Smart Citations

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

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Advances in Advanced In Situ Assembled Composite Electrode Materials for Enhanced Solid Oxide Cell Performance

Song,

Wang

et al. 2024

Adv Funct Materials

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Solid oxide cells (SOCs) hold considerable promise as devices for efficient, reversible conversion between chemical and electrical energy, facilitating a global shift toward renewable energy. Electrode performance is critical for SOC efficiency and durability and composite materials are key to developing high‐performance electrode catalysts. However, conventional mechanical mixing and infiltration methods often lead to large particle sizes, uneven distribution, and weak interfacial interactions, thus limiting electrochemical activity and longevity. Recent advancements have produced powerful new strategies for creating composite materials. These include metal exsolution and oxide segregation for fuel electrodes and one‐pot synthesis, segregation, phase reaction, and dynamic cation exchange for air electrodes. These techniques yield highly active, uniform nano‐catalysts and robust multi–phase interfacial contacts, significantly improving electrochemical activity and durability. This work reviews these advanced strategies and their applications in SOCs. It provides valuable insights for designing and optimizing SOC catalyst materials, accelerating the development of this vital energy conversion technology.

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Nanocomposites: A New Opportunity for Developing Highly Active and Durable Bifunctional Air Electrodes for Reversible Protonic Ceramic Cells

Song

Liu

Wang

et al. 2021

Advanced Energy Materials

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Reversible protonic ceramic cells (RePCCs) can facilitate the global transition to renewable energy sources by providing high efficiency, scalable, and fuel‐flexible energy generation and storage at the grid level. However, RePCC technology is limited by the lack of durable air electrode materials with high activity toward the oxygen reduction/evolution reaction and water formation/water‐splitting reaction. Herein, a novel nanocomposites concept for developing bifunctional RePCC electrodes with exceptional performance is reported. By harnessing the unique functionalities of nanoscale particles, nanocomposites can produce electrodes that simultaneously optimize reaction activity in both fuel cell/electrolysis operations. In this work, a nanocomposite electrode composed of tetragonal and Ruddlesden–Popper (RP) perovskite phases with a surface enriched by CeO2 and NiO nanoparticles is synthesized. Experiments and calculations identify that the RP phase promotes hydration and proton transfer, while NiO and CeO2 nanoparticles facilitate O2 surface exchange and O2‐ transfer from the surface to the major perovskite. This composite also ensures fast (H+/O2‐/e‐) triple‐conduction, thereby promoting oxygen reduction/evolution reaction activities. The as‐fabricated RePCC achieves an excellent peak power density of 531 mW cm‐2 and an electrolysis current of −364 mA cm‐2 at 1.3 V at 600 °C, while demonstrating exceptional reversible operation stability of 120 h at 550 °C.

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Electrochemical Behaviors for Ag, LSCF and BSCF as Oxygen Electrodes for Proton Conducting IT-SOFC

Cited by 65 publications

References 34 publications

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

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

Advances in Advanced In Situ Assembled Composite Electrode Materials for Enhanced Solid Oxide Cell Performance

Nanocomposites: A New Opportunity for Developing Highly Active and Durable Bifunctional Air Electrodes for Reversible Protonic Ceramic Cells

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