Abstract
Developing new strategies to synthesize cathode materials with improved performances is very valuable to, but remains a huge challenge in the research of protonic ceramic fuel cells (PCFCs). Herein, we proposed a new pathway for the syntheses of hybrid cathode, and experimentally verify its applicability in the modification of Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF)-based cathode in PCFCs. The strategy is characteristic by successfully achieving sufficient interfacial metal ion diffusion, which strongly strengthens the combination intensity between different type of grains. Consequently, the electrochemical reactions of the hybrid are expected to be boosted, indicating a promising cathode material for PCFCs. Experimentally, the button cell on BaZr0.4Ce0.4Y0.1Yb0.1O3-δ (BZCYYb4411) electrolyte showed a peak power density (PPD) as high as 632 mW/cm2 at 650 °C, compared to the value of 372 mW/cm2 of the cell with the cathode obtained through traditional ball-milling method under the same conditions. The new strategy proposed in this work might be rewarding for in-depth design of hybrid cathode that are suitable for PCFCs in the future.
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