Perovskites for protonic ceramic fuel cells: a review

Abstract

Protonic ceramic fuel cells (PCFCs), capable of harmonious and efficient conversion of chemical energy into electric power at reduced temperature enabled by fast proton conduction, are promising energy technology, which...

Toward Superb Perovskite Oxide Electrocatalysts: Engineering of Coupled Nanocomposites

“…In parallel with SOFCs, PCFCs that are based on a protonconducting electrolyte show potential application in the intermediate-temperature range (300 to 600 °C) due to the lower activation energy of proton conduction than that of O 2− . [77,[158][159][160][161][162][163][164][165][166][167][168][169][170] The proton (H + ) diffuses from anode to cathode via the electrolyte, then reacts with O 2 to produce H 2 O at the cathode (Figure 17A). However, with reducing the operating temperature, the performance of cells declines significantly as the kinetically sluggish ORR/OER reaction.…”

Sodium-Doped Samarium Oxide Electrolytes for Avoiding the Lithiation-Induced Interface Degradation of Ni0.8Co0.15Al0.05LiO2 Electrode-Based Ceramic Fuel Cells

“…Among various types of fuel cells, ceramic fuel cells (CFCs) are under research and development in an emerging R&D upsurge because of their intriguing advantages such as low material cost without the need to use noble catalyst electrodes, high efficiency, and wide fuel availability, not only for green hydrogen but also for gray or other resources of hydrogen as well as hydrogen−carbon fuels. 1 This can provide the currently clean technology needs also for future green hydrogen times. However, CFCs still face challenges for low cost and marketable accepted products, which require conventional high operating temperature (>750 °C) lowering down to <600 °C.…”

“…A fuel cell can efficiently convert the energy stored in hydrogen into electricity with zero or near-zero emission operation; therefore, they have the potential to reduce greenhouse gas emission in many applications. Among various types of fuel cells, ceramic fuel cells (CFCs) are under research and development in an emerging R&D upsurge because of their intriguing advantages such as low material cost without the need to use noble catalyst electrodes, high efficiency, and wide fuel availability, not only for green hydrogen but also for gray or other resources of hydrogen as well as hydrogen–carbon fuels . This can provide the currently clean technology needs also for future green hydrogen times.…”

An electrochemical assessment of pristine SrCoO3‐δ using the distribution of relaxation times analysis

“…Due to the large thermodynamic barrier for oxygen reduction reaction (ORR) over cathode than that of hydrogen oxidation reaction (HOR) on anode side, the electrochemical properties of cathode play more crucial roles in the cell performance. 5 Therefore, development of highly active cathode is important to the improvement of cell performance. Up to now, cobalt-based perovskite oxides are the most widely used cathodes in SOFCs, because of their broad range of electronic properties at high temperature, which are originated from the delicate interplay between covalent bonding and ionicity manifested in the difference between the cobalt d valence and oxygen p orbital ionization potentials.…”

“…The cathode exposed to oxidizing atmosphere works as the catalyst that can promote the electrocatalytic reduction of oxygen to oxygen ions. Due to the large thermodynamic barrier for oxygen reduction reaction (ORR) over cathode than that of hydrogen oxidation reaction (HOR) on anode side, the electrochemical properties of cathode play more crucial roles in the cell performance 5 . Therefore, development of highly active cathode is important to the improvement of cell performance.…”