Public defence in Chemical Engineering, M.Sc. (Tech.) Penghui Yao
When
Where
Event language(s)
Title of the thesis: Rational design of nickel-based perovskite-type cathode for improved performance of protonic ceramic fuel cells
Doctoral student: M.Sc. (Tech.) Penghui Yao
Opponent: Professor Truls Norby, University of Oslo, Norway
Custos: Professor Yongdan Li, Aalto University School of Chemical Engineering
Rational design of perovskite-type cathode for protonic ceramic fuel cells
Protonic ceramic fuel cells (PCFCs) are highly efficient energy conversion devices operating at 550-700 °C. However, slow oxygen reduction reaction (ORR) kinetics and proton transfer at the cathode remain key challenges. This work focuses on modifying traditional perovskite materials to enhance both ORR kinetics and proton transfer, thus improving the performance of PCFC.
Key improvements include:
Ni-doped La0.5Sr0.5MnO3-δ cathode achieved a peak power density of 1.1 W cm-2 at 700°C, showing improved ORR kinetics and proton transfer.
Ni-doped PrBaFe1.9Mo0.1O6-δ composite cathode delivered 1230 W cm-2 at 700 °C, with enhanced oxygen vacancy, proton transfer, and catalytic activity.
La0.8Sr0.2Co0.7Ni0.3O3-δ cathode reached 1620 mW cm-2 at 700°C, demonstrating good durability.
Pr2Ni0.5Co0.5O4−δ (PNC) impregnated onto La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) boosted ORR activity and proton transfer, achieving 1857 mW cm-2.
These optimizations significantly improved PCFC cathode performance.
→Thesis available for public display 10 days prior to the defence.
Yhteystiedot:
M.Sc. (Tech.) Penghui Yao
[email protected]
- Published:
- Updated: