Issue 46, 2024

Enhanced electrocatalytic activity and stability of high performance symmetrical solid oxide fuel cells with praseodymium-doped SrCo0.2Fe0.8O3−δ electrodes

Abstract

Symmetrical solid oxide fuel cells (SSOFCs) represent a promising path towards energy conversion and storage solutions characterized by reduced material costs, simplified manufacturing, and improved operational stability. The development of high-performance symmetrical electrodes with superior catalytic activity and durability remains a critical challenge. In this study, a series of praseodymium-doped SrCo0.2Fe0.8O3−δ perovskites, PrxSr1−xCo0.2Fe0.8O3−δ (x = 0, 0.1, 0.2, 0.4, 0.6, 0.8, 1) are systematically explored, to evaluate their potential as efficient symmetrical electrodes for SSOFCs. Among the compositions studied, Pr0.2Sr0.8Co0.2Fe0.8O3−δ (P0.2SCF) stands out, with an excellent crystal structure and microstructural stability demonstrated by XRD, XPS and SEM test results, and low polarization resistance values at 850 °C of 0.029 Ω cm2 for the cathode and 0.054 Ω cm2 for the anode. In particular, a single cell containing P0.2SCF achieved an impressive maximum power density of 719.08 mW cm−2 at 850 °C as well as good stability. The results of the DRT analysis show that the main rate-limiting steps of the cell are the gas diffusion and catalytic dissociation processes. These results underscore the potential of P0.2SCF as a highly effective perovskite electrode material for SSOFCs and highlight the key role of Pr doping in enhancing perovskite electrode performance and advancing sustainable energy technologies.

Graphical abstract: Enhanced electrocatalytic activity and stability of high performance symmetrical solid oxide fuel cells with praseodymium-doped SrCo0.2Fe0.8O3−δ electrodes

Supplementary files

Article information

Article type
Paper
Submitted
28 Aug. 2024
Accepted
29 Okt. 2024
First published
31 Okt. 2024

J. Mater. Chem. A, 2024,12, 31895-31901

Enhanced electrocatalytic activity and stability of high performance symmetrical solid oxide fuel cells with praseodymium-doped SrCo0.2Fe0.8O3−δ electrodes

P. Li, B. Yang, J. Chen, B. Li, L. Ma, M. Wang, X. Sun, Y. Tian and B. Chi, J. Mater. Chem. A, 2024, 12, 31895 DOI: 10.1039/D4TA06084A

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