Synergistic dual-phase air electrode enables high and durable performance of reversible proton ceramic electrochemical cells

Abstract Reversible proton ceramic electrochemical cells are promising solid-state ion devices for efficient power generation and energy storage, but necessitate effective air electrodes to accelerate the commercial application. Here, we construct a triple-conducting hybrid electrode through a stoichiometry tuning strategy, composed of a cubic phase Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3−δ and a hexagonal phase Ba 4 Sr 4 (Co 0.8 Fe 0.2 ) 4 O 16−δ . Unlike the common method of creating self-assembled hybrids by breaking through material tolerance limits, the strategy of adjusting the stoichiometric ratio of the A-site/B-site not only achieves strong interactions between hybrid phases, but also can efficiently modifies…

• NN
  National Natural Science Foundation of China

  Awards: 21706129, 21878158, 22209072
• PU
  Pohang University of Science and Technology
• GO
  Government of Jiangsu Province
• NS
  Natural Science Foundation of Jiangsu Province

  Awards: BK20221312, BK20220879
• NT
  Nanjing Tech University

  Award: 2023-09
• SK
  State Key Laboratory of Clean Energy Utilization

  Award: ZJUCEU2021001