New Strategy for Boosting Cathodic Performance of Protonic Ceramic Fuel Cells 
Through Incorporating a Superior Hydronation Second Phase

Zhou, Chuan; Wang, Xixi; Liu, Dongliang; Fei, Meijuan; Dai, Jie; Guan, Daqin; Hu, Zhiwei; Zhang, Linjuan; Wang, Yu; Wang, Wei; O'Hayre, Ryan; Jiang, San Ping; Zhou, Wei; Liu, Meilin; Shao, Zongping

doi:10.1002/eem2.12660

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New Strategy for Boosting Cathodic Performance of Protonic Ceramic Fuel Cells Through Incorporating a Superior Hydronation Second Phase

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Hu, Zhiwei
Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Zhou, C., Wang, X., Liu, D., Fei, M., Dai, J., Guan, D., et al. (2023). New Strategy for Boosting Cathodic Performance of Protonic Ceramic Fuel Cells Through Incorporating a Superior Hydronation Second Phase. Energy & Environmental Materials, e12660, pp. 1-10. doi:10.1002/eem2.12660.

Cite as: https://hdl.handle.net/21.11116/0000-000D-944F-4

Abstract

For protonic ceramic fuel cells, it is key to develop material with high intrinsic activity for oxygen activation and bulk proton conductivity enabling water formation at entire electrode surface. However, a higher water content which benefitting for the increasing proton conductivity will not only dilute the oxygen in the gas, but also suppress the O2 adsorption on the electrode surface. Herein, a new electrode design concept is proposed, that may overcome this dilemma. By introducing a second phase with high-hydrating capability into a conventional cobalt-free perovskite to form a unique nanocomposite electrode, high proton conductivity/concentration can be reached at low water content in atmosphere. In addition, the hydronation creates additional fast proton transport channel along the two-phase interface. As a result, high protonic conductivity is reached, leading to a new breakthrough in performance for proton ceramic fuel cells and electrolysis cells devices among available air electrodes. © 2023 The Authors. Energy Environmental Materials published by John Wiley Sons Australia, Ltd on behalf of Zhengzhou University.