Triple ionic–electronic conducting oxides for next-generation electrochemical devices

Papac, Meagan; Stevanović, Vladan; Zakutayev, Andriy; O’Hayre, Ryan

doi:10.1038/s41563-020-00854-8

Cited by 220 publications

(180 citation statements)

References 143 publications

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“…Moreover, triple charge (H + /O 2-/e -) conducting materials, e.g. p-type BaCo0.4Fe0.4Zr0.1Y0.1O3-δ and Ba0.5Sr0.5Co0.1Fe0.7Zr0.1Y0.1O3-δ were also demonstrated in the single-layer device, exhibiting excellent fuel cell performances [43][44][45].…”

Section: Materials and Technologiesmentioning

confidence: 99%

A nanoscale perspective on solid oxide and semiconductor membrane fuel cells: materials and technology

Mi¹,

Chen²,

Wang³

et al. 2022

Energy Mater

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Section: Materials and Technologiesmentioning

confidence: 99%

A nanoscale perspective on solid oxide and semiconductor membrane fuel cells: materials and technology

Mi¹,

Chen²,

Wang³

et al. 2022

Energy Mater

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“…SOCs can be either oxygen‐ (O‐SOC) or proton‐ (H‐SOC) conducting, depending on electrolyte composition. [ 2,5,10,11 ] In particular, solid oxide electrolysis cells based on proton‐conducting electrolytes (PCECs) have three unique advantages over conventional (oxygen ion‐conducting) solid oxide electrolysis cells (O‐SOECs). First, the lower activation energy of proton conduction compared to oxygen conduction results in lower operating temperatures for PCECs than O‐SOECs.…”

Section: Introductionmentioning

confidence: 99%

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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“…An important goal therefore is to improve the proton uptake and conductivity of potential PCFC cathode materials such that the active zone for oxygen reduction is expanded beyond the gas/electrolyte/cathode triple phase boundary. 11,12 Different strategies for further optimisation of PCFC cathodes were investigated e.g. by using composites of proton-conducting and electron/hole-conducting materials.…”

Section: Introductionmentioning

confidence: 99%

Influence of Y-substitution on phase composition and proton uptake of self-generated Ba(Ce,Fe)O_3−δ–Ba(Fe,Ce)O_3−δcomposites

et al. 2022

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Triple ionic–electronic conducting oxides for next-generation electrochemical devices

Cited by 220 publications

References 143 publications

A nanoscale perspective on solid oxide and semiconductor membrane fuel cells: materials and technology

A nanoscale perspective on solid oxide and semiconductor membrane fuel cells: materials and technology

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

Influence of Y-substitution on phase composition and proton uptake of self-generated Ba(Ce,Fe)O_3−δ–Ba(Fe,Ce)O_3−δcomposites

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Triple ionic–electronic conducting oxides for next-generation electrochemical devices

Cited by 220 publications

References 143 publications

A nanoscale perspective on solid oxide and semiconductor membrane fuel cells: materials and technology

A nanoscale perspective on solid oxide and semiconductor membrane fuel cells: materials and technology

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

Influence of Y-substitution on phase composition and proton uptake of self-generated Ba(Ce,Fe)O3−δ–Ba(Fe,Ce)O3−δcomposites

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Influence of Y-substitution on phase composition and proton uptake of self-generated Ba(Ce,Fe)O_3−δ–Ba(Fe,Ce)O_3−δcomposites