Hu, Dingyue, Kim, Junyoung, Niu, Hongjun, Daniels, Luke M 
ORCID: 0000-0002-7077-6125, Manning, Troy D ORCID: 0000-0002-7624-4306, Chen, Ruiyong ORCID: 0000-0002-5340-248X, Liu, Bowen, Feetham, Richard, Claridge, John B ORCID: 0000-0003-4849-6714 and Rosseinsky, Matthew J ORCID: 0000-0002-1910-2483
(2022)
High-performance protonic ceramic fuel cell cathode using protophilic mixed ion and electron conducting material
JOURNAL OF MATERIALS CHEMISTRY A, 10 (5).
pp. 2559-2566.
ISSN 2050-7488, 2050-7496
Abstract
Protonic ceramic fuel cells (PCFCs) are attractive energy conversion devices for intermediate-temperature operation (400-600 °C), however widespread application of PCFCs relies on the development of new high-performance electrode materials. Here we report the electrochemical and protonic properties of a self-assembled nanocomposite, Ba0.5Sr0.5(Co0.7Fe0.3)0.6875W0.3125O3-δ (BSCFW) consisting of a disordered single perovskite and an ordered double perovskite phase, as a PCFC cathode material. BSCFW shows thermodynamic and kinetic protonic behaviour conducive to PCFC application with favourable proton defect formation enthalpy (ΔH = -35 ± 7 kJ mol-1) comparable to existing proton conducting electrolyte materials. BSCFW presents an excellent polarization resistance (Rp) of 0.172(2) Ω cm2 at 600 °C and a high power density of 582(1) mW cm-2 through single-cell measurement, which is a comparable performance to current state-of-the-art cathode materials. BSCFW exhibits good chemical and thermal stability against BaZr0.1Ce0.7Y0.1Yb0.1O3-δ (BZCYYb) electrolyte with a low Rp degradation rate of 1.0(1) × 10-6 Ω cm2 min-1. These performance and stability figures represent an advance beyond those of Ba0.5Sr0.5Co0.7Fe0.3O3-δ (BSCF), which is unstable under the same conditions and is incompatible with the electrolyte material. Our comprehensive characterization of the protonic properties of BSCFW, whose performance and stability are ensured via the interplay of the single and double perovskite phases, provides fundamental understanding that will inform the future design of high-performance PCFC cathodes. This journal is
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | 3403 Macromolecular and Materials Chemistry, 34 Chemical Sciences, 3406 Physical Chemistry, 40 Engineering, 4016 Materials Engineering, 7 Affordable and Clean Energy |
| Divisions: | Faculty of Science & Engineering > School of Physical Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 10 May 2022 12:27 |
| Last Modified: | 16 Jun 2026 10:27 |
| DOI: | 10.1039/d1ta07113k |
| Open Access URL: | https://pubs.rsc.org/en/content/articlelanding/202... |
| Related Websites: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3154552 |
| Disclaimer: | The University of Liverpool is not responsible for content contained on other websites from links within repository metadata. Please contact us if you notice anything that appears incorrect or inappropriate. |
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