A high-entropy spinel ceramic oxide as the cathode for proton-conducting solid oxide fuel cells

Abstract A high-entropy ceramic oxide is used as the cathode for the first time for proton-conducting solid oxide fuel cells (H-SOFCs). The Fe 0.6 Mn 0.6 Co 0. 6 Ni 0.6 Cr 0.6 O 4 (FMCNC) high-entropy spinel oxide has been successfully prepared, and the in situ chemical stability test demonstrates that the FMCNC material has good stability against CO 2 . The first-principles calculation indicates that the high-entropy structure enhances the properties of the FMCNC material that surpasses their individual components, leading to lower O 2 adsorption energy for FMCNC than that for the individual components. The H-SOFC using the FMCNC cathode reaches an encouraging peak power density (PPD) of 1052 mW·cm −2 at 700…

• NN
  National Natural Science Foundation of China

  Award: 51972183
• UO
  University of South China