Unveiling the importance of the interface in nanocomposite cathodes for proton-conducting solid oxide fuel cells

Yanru Yin; Yifan Wang; Nan Yang; Lei Bi

doi:10.1002/EXP.20230082

Exploration ›› 2024, Vol. 4 ›› Issue (4) :20230082 DOI: 10.1002/EXP.20230082

RESEARCH ARTICLE

Unveiling the importance of the interface in nanocomposite cathodes for proton-conducting solid oxide fuel cells

Yanru Yin ¹
, Yifan Wang ²
, Nan Yang ²^,^†
, Lei Bi ¹^,³^,^†

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Abstract

Designing a high-performance cathode is essential for the development of protonconducting solid oxide fuel cells (H-SOFCs), and nanocomposite cathodes have proven to be an effective means of achieving this. However, the mechanism behind the nanocomposite cathodes’ remarkable performance remains unknown. Doping the Co element into BaZrO₃ can result in the development of BaCoO₃ and BaZr_0.7Co_0.3O₃ nanocomposites when the doping concentration exceeds 30%, according to the present study. The construction of the BaCoO₃/BaZr_0.7Co_0.3O₃ interface is essential for the enhancement of the cathode catalytic activity, as demonstrated by thin-filmstudies using pulsed laser deposition to simulate the interface of the BCO and BZCO individual particles and first-principles calculations to predict the oxygen reduction reaction steps. Eventually, the H-SOFC with a BaZr_0.4Co_0.6O₃ cathode produces a record-breaking power density of 2253 mW cm⁻² at 700°C.

Keywords

interface / proton conductor / pulsed laser deposition / solid oxide fuel cells

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Yanru Yin, Yifan Wang, Nan Yang, Lei Bi. Unveiling the importance of the interface in nanocomposite cathodes for proton-conducting solid oxide fuel cells. Exploration, 2024, 4(4): 20230082 DOI:10.1002/EXP.20230082

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