Design of a perovskite oxide cathode for a protonic ceramic fuel cell
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2024-01-01
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Language
en
Pages
10
2373-2382
2373-2382
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Ceramics International, Volume 50, issue 1
Abstract
High catalytic activity, low-cost and stable cathode in a temperature range 550–700 °C is essential for the development of protonic ceramic fuel cells (PCFCs). Doping nickel into perovskite La0.5Sr0.5MnO3-δ(LSM) is designed as a cobalt-free cathode based on theoretical calculations and experiments. La0.5Sr0.5Mn0.9Ni0.1O3-δ (LSMNi) as cathode shows higher proton conductivity and ORR activity than the undoped LSM. The PCFCs with LSMNi exhibit low polarization resistance and high peak power density 1.1 W cm−2 at 700 °C. The density functional theory simulations indicate that doping with nickel decreases the oxygen vacancy formation energy and promotes the formation of hydroxide defects. The decrease in proton transfer energy barriers and hydration energy improves the proton conductivity. The improved performance is attributed to fast proton transfer and rapid kinetics of oxygen reduction on the surface of LSMNi. This work provides a novel approach to design cobalt-free cathode for a protonic ceramic fuel cell.Description
Funding Information: This work was supported with the start-up package of T10108 professorship offered by Aalto University . P. Yao and Q. Qiu acknowledge the financial support from the China Scholarship Council (Grant No. 202006120046 and 201906150134 ). The authors acknowledge the technical support of TEM from OtaNano Nanomicroscopy Center and computational resources from CSC-IT center for science, Finland. Publisher Copyright: © 2023 The Authors
Keywords
LaSrMnNiO, Oxygen reduction reaction (ORR), Proton transfer, Protonic ceramic fuel cells (PCFC)
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Citation
Yao, P, Zhang, J, Qiu, Q, Li, G, Zhao, Y, Yu, F & Li, Y 2024, ' Design of a perovskite oxide cathode for a protonic ceramic fuel cell ', Ceramics International, vol. 50, no. 1, pp. 2373-2382 . https://doi.org/10.1016/j.ceramint.2023.11.015