A highly efficient bismuth substitution induced A-site ordered layered perovskite electrode for symmetrical solid oxide fuel cells

Abstract

The rational design of identical electrode materials with high activity and stability is still a big challenge for developing symmetrical solid oxide fuel cell (SSOFC). In this study, an A-site...

A redox-reversible A/B-site co-doped BaFeO3 electrode for direct hydrocarbon solid oxide fuel cells

“…S4,† and is linearly fitted to calculate the activation energy of the electrode reaction in air or in a hydrogen atmosphere. The values of E a for the electrode reaction process at the temperature range of 650–800° are 1.40 and 1.17 eV in air and in hydrogen, respectively, which are close to those of some reported electrode materials, such as Ba 0.95 La 0.05 Fe 0.9 Nb 0.1 O 3− δ (1.09 eV in H 2 ), 24 (Ba 0.9 La 0.1 ) 0.95 Co 0.7 Fe 0.2 Nb 0.1 O 3− δ (1.28 eV in 5%H 2 /Ar), 27 Pr 0.4 Bi 0.1 Ba 0.5 MnO 3− δ (1.12 eV in H 2 ), 42 (Sr 0.3 La 0.7 ) 0.8 (Fe 0.7 Ti 0.3 ) 0.9 Ni 0.1 O 3− δ (1.31 eV in air), 43 and (PrBa) 0.95 (Fe 0.9 Mo 0.1 ) 2 O 5 + δ (1.31 eV in air), 44 and lower E a values in H 2 than in air represent a smaller chemical barrier for fuel oxidation reaction at the electrode. 43…”

Ni-Substituted Sr2FeMoO6−δ as an Electrode Material for Symmetrical and Reversible Solid-Oxide Cells

“…On the other hand, to meet the demand of working as both the fuel electrode and oxygen electrode on the reversible SOFC–SOEC mode, the electrode material should not only exhibit excellent physical and chemical stability in both oxidation and reduction atmospheres but also the catalytic activity of the material should be enough for the hydrogen oxidation, hydrogen evolution, oxygen reduction, and oxygen evolution. Many typical perovskite-type and Ruddlesden–Popper (RP) oxides are used as electrodes in SSOC. − Although these works proved that the symmetrical configuration in the SOC is a possible novel strategy, the electrochemical activity of electrodes still needs to be further improved. Among these, Sr 2 FeMoO 6−δ (SFM) double perovskites are especially promising because of their outstanding electrical conductivity and chemical stability. ,, Unfortunately, their comparatively poor catalytic activity obstructs their practical applications.…”

Developing abundant rare-earth iron perovskite electrodes for high-performance and low-cost solid oxide fuel cells

“… 1 , 2 , 3 After the carbon neutrality goal was proposed, people paid more attention to energy efficiency and greenhouse gas emissions, therefore, renewable energy utilization was regarded as a solution to the energy crisis and energy transition. 4 , 5 In the past few decades, solid oxide fuel cells (SOFCs) have been widely recognized as promising for their high energy conversion efficiency, low emissions, and wide range of fuel adaptability. 6 , 7 , 8 However, their application scenarios are also limited by their high operating temperature and other conditions, which also pose high requirements on the performance of electrodes, electrolytes, and other materials under high temperature conditions.…”