Nanostructuring the electronic conducting La0.8Sr0.2MnO3−δ cathode for high-performance in proton-conducting solid oxide fuel cells below 600°C

Tailoring the Cathode–Electrolyte Interface with Nanoparticles for Boosting the Solid Oxide Fuel Cell Performance of Chemically Stable Proton‐Conducting Electrolytes

“…The high performance was achieved due to the rational design of extending the TPBs by using nanoparticles, providing more sites for oxygen reduction reactions. It is worth underlying that nanoparticle fabrication can be scaled‐up using inkjet printing . The cell performance is not only the largest, at present, among all the reported fuel cells with chemically stable BaZrO 3 ‐based electrolyte fabricated using ceramic processing, but also better than that obtained for cells with modified BaCeO 3 ‐based electrolytes possessing moderate chemical stability.…”

“…Considering the issue of coarsening of the nanosized particles over time, one would assume that, since the nanoparticles were synthesized at 800 °C, the size stability would not be significantly affected by operating the cells at 600 °C or below . The morphology of the cell was investigated using SEM observations after the fuel cell tests and no significant changes in the morphology were observed, showing the stability of the samples at least in the time frame of testing (see Figure S3 in the Supporting Information).…”

Modification of a first-generation solid oxide fuel cell cathode with Co3O4 nanocubes having selectively exposed crystal planes

“…Even compared to a similar LSM-SDC cathode composed of Co 3 O 4 nanoarrays reported in a previous study [12], the Co 3 O 4 (001) surfacebased cathode fabricated in this study has a polarization resistance that is almost one order of magnitude lower, suggesting that the use of Co 3 O 4 nanocubes would be a rational strategy for engineering Co 3 O 4 nanostructures to boost the fuel cell performance. Although the LSM-based cells fabricated using the Co 3 O 4 (001) surface-based cathode, as presented in this study, have improved performances compared to conventional LSM-based cells, decreased polarization resistances and increased performances compared to many LSM-based cells described in the literature [7,[29][30][31], the performance is still lower than that of cells made using highly active perovskite cathodes [32,33]. Considering the pure electron-conducting nature of LSM compounds, further improvement in the fuel cell performance is reasonably expected by tailoring the cathode particle size or the size of the Co 3 O 4 nanocubes to increase the number of active reaction sites [34][35][36], or by using an oxygen-electronic mixed cathode instead of an LSM cathode [37][38][39].…”

“…However, LSM is regarded as a good cathode material for applications in SOFCs at high temperatures (above 800 °C), but it is not an appropriate cathode material for use in SOFCs at intermediate temperatures (approximately, 600 °C) due to its pure electronic conductivity without any apparent ionic conductivity [6]. Therefore, the design of nanostructured LSM cathodes [7] and the use of new materials with electron and oxygen ion mixed conductivity [8,9] as cathodes in SOFCs at intermediate temperatures have been proposed.…”

Atomistic simulations of anisotropic mechanical behavior in non‐stoichiometric gadolinia‐doped ceria solid electrolytes

“…Solid oxide fuel cells (SOFCs) have been extensively studied owing to their unique properties, such as high electrical efficiency, intermediate operating temperature, low environmental pollution, and excellent fuel flexibility and thus are attracting wide attention as a nextgeneration fuel cell system. [1][2][3][4][5][6][7] As an important part of SOFCs, the properties of electrolyte play an important role in the whole system. In SOFCs system, solid electrolyte plays the role of separating fuel from oxygen and conducting oxygen ions.…”