Issue 16, 2020

Pr2BaNiMnO7−δ double-layered Ruddlesden–Popper perovskite oxides as efficient cathode electrocatalysts for low temperature proton conducting solid oxide fuel cells

Abstract

The performance of low-temperature solid-oxide fuel cells (LT-SOFCs) is heavily dependent on the electrocatalytic activity of the cathode toward the oxygen reduction reaction (ORR). To overcome the obstacles of the poor activity and stability of traditional cathode materials, a Pr2BaNiMnO7−δ double-layered Ruddlesden–Popper structural oxide was developed that exhibits high ORR activity, exceptional low-temperature cell performance, long-term stability, and excellent chemical compatability with a BaZr0.1Ce0.7Y0.1Yb0.1O3−δ (BZCYYb) proton-conducting electrolyte. When Pr2BaNiMnO7−δ is used as the cathode electrocatalyst for BZCYYb-based SOFCs, it demonstrates a peak power density of 1070 mW cm−2 at 700 °C with excellent stability under 0.7 V after 100 h of discharging. Even at 500 and 400 °C, the peak power densities still reach 259 and 135 mW cm−2, respectively. The area-specific polarization resistance of this cell is 0.084 Ω cm2 at 700 °C under open-circuit voltage (OCV) conditions. Interestingly, the activation energy (Ea) of the polarization resistance derived from the assembled single cell is lower than that in the reported literature, corresponding to a value of 0.96 eV. The excellent performance is higher than those of the state-of-the-art Ruddlesden–Popper structure materials used as cathode electrocatalysts for LT-SOFCs. Thus, these results suggest that the double-layered Ruddlesden–Popper perovskite oxide Pr2BaNiMnO7−δ is a preeminent highly active low-temperature cathode material.

Graphical abstract: Pr2BaNiMnO7−δ double-layered Ruddlesden–Popper perovskite oxides as efficient cathode electrocatalysts for low temperature proton conducting solid oxide fuel cells

Supplementary files

Article information

Article type
Paper
Submitted
11 okt 2019
Accepted
24 dec 2019
First published
25 dec 2019

J. Mater. Chem. A, 2020,8, 7704-7712

Pr2BaNiMnO7−δ double-layered Ruddlesden–Popper perovskite oxides as efficient cathode electrocatalysts for low temperature proton conducting solid oxide fuel cells

Q. Wang, J. Hou, Y. Fan, X. Xi, J. Li, Y. Lu, G. Huo, L. Shao, X. Fu and J. Luo, J. Mater. Chem. A, 2020, 8, 7704 DOI: 10.1039/C9TA11212J

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements