Advances in Materials and Interface Understanding in Protonic Ceramic Fuel Cells

Abstract

Protonic ceramic fuel cells (PCFCs) are promising eco‐energy electrochemical energy conversion systems that can efficiently operate in intermediate (500–700 °C) to low (500 °C) temperature ranges. In this review the most recent advances in materials research for the ceramic components of PCFCs (i.e., electrolyte, cathode, and anode) and their interface engineering are introduced. Recent approaches to improve the protonic of conductivity, and activity and stability of electrolyte and electrode materials are first presented. In addition, new attempts to stabilize/activate electrode/electrolyte interfaces and electrode surfaces are also discussed. Details of the theoretical background behind the electron and ion transfer processes at electrodes are also discussed. Finally, the challenges and perspectives of PCFC development are suggested from the point of view of materials engineering.

Dual Self-Assembled Nanocomposite Cathode for Protonic Ceramic Fuel Cells

“…The decrease in R s can be ascribed to the optimized bond formation between the cathode and electrolyte. 39 Additionally, the self-assembly process within the PNC/BCZY cathode likely contributes to this R p decrease by generating a new phase. The activation energies (Ea) for the R s in the PNC cell and PNC/BCZY cell are 0.41 and 0.44 eV, respectively, aligning with reported values for the BCZY electrolyte.…”

A review of progress in proton ceramic electrochemical cells: material and structural design, coupled with value-added chemical production

“…278 Some oxides and other types of materials have emerged as promising candidates for fuel electrodes, exhibiting good catalytic activity for H 2 and hydrocarbons, while being resistant to carbon deposition and sulfur poisoning. 291 For example, well-distributed La 0.8 Sr 0.2 Cr 0.5 Mn 0.5 O 3Àd (LSCM) particles have been impregnated into a BaZr 0.75 Y 0.15 O 3Àd (BZY7515) scaffold as a fuel electrode, which exhibits peak power densities of 0.331 and 0.156 W cm À2 for H 2 and CH 4 fuels, respectively. 292 It is noteworthy that the proton conductivity of LSCM increases with the increase of oxygen partial pressure, resulting in better redox stability of LSCM than Ni-cermet electrodes.…”

“…278 Some oxides and other types of materials have emerged as promising candidates for fuel electrodes, exhibiting good catalytic activity for H 2 and hydrocarbons, while being resistant to carbon deposition and sulfur poisoning. 291…”

Emerging Exsolution Materials for Diverse Energy Applications: Design, Mechanism, and Future Prospects

“…Nanostructured spinel oxides can be irreversibly exsolved from perovskite oxides to improve the cathode reaction. Yu et al 100 101,102 Proton-conducting materials, including BZY, BZCY, and BZCYYb, also have perovskite structures. 103 Thus, the exsolution of proton-conducting perovskite-based materials could improve the electrode performance of PCFCs.…”

“…PCFCs are attractive because they have superior protonic conductivity, even under intermediate operating temperatures. , Proton-conducting materials, including BZY, BZCY, and BZCYYb, also have perovskite structures . Thus, the exsolution of proton-conducting perovskite-based materials could improve the electrode performance of PCFCs.…”