Improving tubular protonic ceramic fuel cell performance by compensating Ba evaporation via a Ba-excess optimized proton conducting electrolyte synthesis strategy

Protonic ceramic fuel cells (PCFCs) are emerging as a promising technology for reduced temperature ceramic energy conversion devices. The BaCe 0.4 Zr 0.4 Y 0.1 Yb 0.1 O 3− δ (BCZYYb4411) electrolyte is notable for its high proton conductivity. However, the tendency of barium to volatilize in BCZYYb4...

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Published in:JPhys Energy 2024-07, Vol.6 (3), p.35004
Main Authors: Kim, You-Dong, Kim, In-Ho, Meisel, Charlie, Herradón, Carolina, Rand, Peter W, Yang, Jayoon, Kim, Hyun Sik, Sullivan, Neal P, O’Hayre, Ryan
Format: Article
Language:English
Subjects:
Barium
barium evaporation
Ceramics
Chemical properties
Electrochemical analysis
Electrolytic cells
Energy conversion
Evaporation
Fuel cells
High temperature
protonic ceramic electrolyte
protonic ceramic fuel cells
Protons
reducing sintering temperature
tubular protonic ceramic fuel cells
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container_issue 3
container_start_page 35004
container_title JPhys Energy
container_volume 6
creator Kim, You-Dong
Kim, In-Ho
Meisel, Charlie
Herradón, Carolina
Rand, Peter W
Yang, Jayoon
Kim, Hyun Sik
Sullivan, Neal P
O’Hayre, Ryan
description Protonic ceramic fuel cells (PCFCs) are emerging as a promising technology for reduced temperature ceramic energy conversion devices. The BaCe 0.4 Zr 0.4 Y 0.1 Yb 0.1 O 3− δ (BCZYYb4411) electrolyte is notable for its high proton conductivity. However, the tendency of barium to volatilize in BCZYYb4411 during high-temperature sintering compromises its chemical stability and performance. This study investigates the effects of intentionally incorporating excess barium into BCZYYb4411, formulated as Ba 1+ x Ce 0.4 Zr 0.4 Y 0.1 Yb 0.1 O 3− δ (where x = 0, 0.1, 0.2, and 0.3), with the aim of compensating barium evaporation and enhancing the physical and chemical properties. We find that excess barium results in a greater shrinkage rate, facilitating a denser electrolyte structure. This barium-enriched electrolyte demonstrates improved electrochemical performance by effectively counteracting the deleterious effects of barium evaporation. Applying this strategy to tubular PCFCs, we achieved a peak power density of 480 mW∙cm −2 at 600 °C. This unique approach provides a simple, tunable, and easy-to-implement processing modification to achieve high-performance tubular PCFC.
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subjects Barium
barium evaporation
Ceramics
Chemical properties
Electrochemical analysis
Electrolytic cells
Energy conversion
Evaporation
Fuel cells
High temperature
protonic ceramic electrolyte
protonic ceramic fuel cells
Protons
reducing sintering temperature
tubular protonic ceramic fuel cells
title Improving tubular protonic ceramic fuel cell performance by compensating Ba evaporation via a Ba-excess optimized proton conducting electrolyte synthesis strategy
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