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(La0.8Sr0.2)0.98MnO3-δ-Zr0.92Y0.16O2-δ:PrOx for oxygen electrode supported solid oxide cells

Journal Article · · Applied Catalysis. B, Environmental
 [1];  [2];  [2];  [2];  [2]
  1. Northwestern Univ., Evanston, IL (United States); North China Electric Power University, Beijing (China); OSTI
  2. Northwestern Univ., Evanston, IL (United States)
(La0.8Sr0.2)0.98MnO3-δ (LSM)- Zr0.92Y0.16O2-δ (YSZ) has been widely studied as the cathode for solid oxide fuel cells (SOFCs), but its low activity has been a cell performance limiting factor. Herein, LSM-YSZ:PrOx composite is developed as an active electrocatalyst for both oxygen reduction and evolution reactions. A single step PrOx infiltration into LSM-YSZ lowers the polarization resistance (Rp) 10–20 times depending on the test temperature. Distribution of relaxation times (DRT) calculation reveals that adding PrOx affects surface exchange between adsorbed/desorbed oxygen and lattice oxygen, and oxygen dissociative adsorption/desorption. A symmetrical cell with a thin YSZ electrolyte sandwiched between thick LSM-YSZ:PrOx electrode-supports is developed and its oxygen generation performance and stability are evaluated under various current densities and temperatures. Finally, reversible solid oxide cell (ReSOC) performance is also reported for LSM-YSZ:PrOx supported cells with the oxide fuel electrode Sr0.95(Ti0.3Fe0.63Ni0.07)O3-δ (STFN).
Research Organization:
Northwestern Univ., Evanston, IL (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
EE0008437
OSTI ID:
1976838
Alternate ID(s):
OSTI ID: 1842885
Journal Information:
Applied Catalysis. B, Environmental, Journal Name: Applied Catalysis. B, Environmental Journal Issue: C Vol. 306; ISSN 0926-3373
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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