Building Ruddlesden–Popper and Single Perovskite Nanocomposites: A New Strategy to Develop High‐Performance Cathode for Protonic Ceramic Fuel Cells
- 12 July 2021
- Vol. 17 (35), 2101872
- https://doi.org/10.1002/smll.202101872
Abstract
Here a new strategy is unveiled to develop superior cathodes for protonic ceramic fuel cells (PCFCs) by the formation of Ruddlesden–Popper (RP)-single perovskite (SP) nanocomposites. Materials with the nominal compositions of LaSrxCo1.5Fe1.5O10−δ (LSCFx, x = 2.0, 2.5, 2.6, 2.7, 2.8, and 3.0) are designed specifically. RP-SP nanocomposites (x = 2.5, 2.6, 2.7, and 2.8), SP oxide (x = 2.0), and RP oxide (x = 3.0) are obtained through a facile one-pot synthesis. A synergy is created between RP and SP in the nanocomposites, resulting in more favorable oxygen reduction activity compared to pure RP and SP oxides. More importantly, such synergy effectively enhances the proton conductivity of nanocomposites, consequently significantly improving the cathodic performance of PCFCs. Specifically, the area-specific resistance of LSCF2.7 is only 40% of LSCF2.0 on BaZr0.1Ce0.7Y0.2O3−δ (BZCY172) electrolyte at 600 °C. Additionally, such synergy brings about a reduced thermal expansion coefficient of the nanocomposite, making it better compatible with BZCY172 electrolyte. Therefore, an anode-supported PCFC with LSCF2.7 cathode and BZCY172 electrolyte brings an attractive peak power output of 391 mW cm−2 and excellent durability at 600 °C.Keywords
Funding Information
- Australian Research Council (DP200103315)
- Natural Science Foundation of Jiangsu Province (BK20190965)
This publication has 63 references indexed in Scilit:
- A high performance cathode for proton conducting solid oxide fuel cellsJournal of Materials Chemistry A, 2015
- Insight into an unusual lanthanum effect on the oxygen reduction reaction activity of Ruddlesden-Popper-type cation-nonstoichiometric La2−xNiO4+δ (x = 0–0.1) oxidesJournal of Materials Chemistry A, 2015
- High-performance SrNb0.1Co0.9−xFexO3−δperovskite cathodes for low-temperature solid oxide fuel cellsJournal of Materials Chemistry A, 2014
- High-performance anode-supported solid oxide fuel cells based on nickel-based cathode and Ba(Zr0.1Ce0.7Y0.2)O3−δ electrolyteJournal of Alloys and Compounds, 2013
- Effect of foreign oxides on the phase structure, sintering and transport properties of Ba0.5Sr0.5Co0.8Fe0.2O3−δ as ceramic membranes for oxygen separationSeparation and Purification Technology, 2011
- Cathode processes and materials for solid oxide fuel cells with proton conductors as electrolytesJournal of Materials Chemistry, 2010
- A mixed proton, oxygen ion, and electron conducting cathode for SOFCs based on oxide proton conductorsJournal of Power Sources, 2010
- Evaluation of A-site cation-deficient (Ba0.5Sr0.5)1−xCo0.8Fe0.2O3−δ (x>0) perovskite as a solid-oxide fuel cell cathodeJournal of Power Sources, 2008
- A high-performance cathode for the next generation of solid-oxide fuel cellsNature, 2004
- Sm0.5Sr0.5CoO3 cathodes for low-temperature SOFCsSolid State Ionics, 2002