Reverse Atom Capture on Perovskite Surface Enabling Robust and Efficient Cathode for Protonic Ceramic Fuel Cells.
Sunce ZhaoWenjia MaWenwen WangYonglong HuangJi WangSijiao WangZhu ShuBeibei HeLing ZhaoPublished in: Advanced materials (Deerfield Beach, Fla.) (2024)
Protonic ceramic fuel cells (PCFCs) hold potential for sustainable energy conversion, yet their widespread application is hindered by the sluggish kinetics and inferior stability of cathode materials. Here, a facile and efficient reverse atom capture technique is developed to manipulate the surface chemistry of PrBa 0.5 Sr 0.5 Co 1.5 Fe 0.5 O 5+δ (PBSCF) cathode for PCFCs. This method successfully captures segregated Ba and Sr cations on the PBSCF surface using W species, creating a (Ba/Sr)(Co/Fe/W)O 3-δ (BSCFW)@PBSCF heterostructure. Benefiting from enhanced kinetics of proton-involved oxygen reduction reaction and strengthened chemical stability, the single cell using the optimized 2W-PBSCF cathode demonstrates an exceptional peak power density of 1.32 W cm -2 at 650 °C and maintains durable performance for 240 h. Theoretical calculations unveil that the BSCFW perovskite delivers lower oxygen vacancy formation energy, hydration energy, and proton transfer energy compared to the PBSCF perovskite. This protocol offers new insights into advanced atom capture techniques for sustainable energy infrastructures. This article is protected by copyright. All rights reserved.
Keyphrases
- solar cells
- reduced graphene oxide
- electron transfer
- molecular dynamics
- induced apoptosis
- ion batteries
- cell cycle arrest
- single cell
- room temperature
- high efficiency
- randomized controlled trial
- oxidative stress
- gold nanoparticles
- rna seq
- quantum dots
- cell proliferation
- molecular dynamics simulations
- pi k akt
- metal organic framework
- climate change
- drug discovery