Synergistic Doping in Proton‐Conducting Oxides Unlocks High Conductivity and Low Proton Trapping

ABSTRACT The development of proton‐conducting oxides is pivotal for advancing solid oxide fuel cells (SOFCs), yet it is perpetually hampered by a critical trade‐off between high proton conductivity and good sinterability. Conventional doping strategies, typically employing single elements, often improve one property at the expense of the other. Here, we break this long‐standing compromise by introducing a multi‐element doping strategy, creating a novel proton conductor, BaCe 0.7 Zr 0.1 Gd 0.04 Nd 0.04 Sm 0.04 Y 0.04 Yb 0.04 O 3 (GNSYYb), which simultaneously exhibits superior sinterability, the highest proton defect concentration, and the largest grain size among all singly doped analogues. As a result, GNSYYb…

• NN
  National Natural Science Foundation of China

  Awards: 52272216, 52572230