Electrochemical Performance of Cobalt‐free Nd0.5Ba0.5Fe1–xNixO3–δ Cathode Materials for Intermediate Temperature Solid Oxide Fuel Cells. Issue 2 (15th March 2016)

• Record Type: Journal Article
• Authors: Shi, H.; Ding, Z.; Ma, G.
• Is Part Of: Fuel cells. Volume 16:Issue 2(2016:Apr.)
• Page Start: 258
• Page End: 262
• Publication Date: 2016-03-15
• Subjects: Cathode -- Ceramic Membrane -- Conductivity -- Intermediate Temperature -- Properties -- SOFC; Fuel cells -- Periodicals; 621.312429
• DOI: 10.1002/fuce.201500156
• Languages: English
• ISSNs: 1615-6846

Abstract

Abstract: A new series of cobalt‐free perovskite‐type oxides, Nd0.5 Ba0.5 Fe1–x Nix O3– δ (0 ≤ x ≤ 0.15), have been prepared by a citric acid‐nitrate process and investigated as cathode materials for proton conducting intermediate temperature solid oxide fuel cells (IT‐SOFCs). The conductivity of the oxides was measured at 300–800 °C in air. It is discovered that partial substitution of Ni for Fe‐sites in Nd0.5 Ba0.5 Fe1–x Nix O3– δ obviously enhances the conductivity of the oxides. Among the series of oxides, the Nd0.5 Ba0.5 Fe0.9 Ni0.1 O3– δ (NBFNi10) exhibits the highest conductivity of 140 S cm −1 in air at 550 °C. A single H2 /air fuel cell with proton‐conducting BaZr0.1 Ce0.7 Y0.2 O3– δ (BZCY) electrolyte membrane (ca. 40 μm thickness) and NBFNi10‐BZCY composite cathode and NiO‐BZCY composite anode was fabricated and tested at 600–700 °C. The peak power density and the interfacial polarization resistance ( R p ) of the cell are 490 mW cm −2 and 0.15 Ω cm 2 at 700 °C, respectively. The experimental results indicate that NBFNi10 is a promising cathode material for the proton‐conducting IT‐SOFCs.