Rational design of hierarchically nanostructured electrodes for solid oxide fuel cells

Reaction Mechanism and Impact of Microstructure on Performances for the LSCF‐CGO Composite Electrode in Solid Oxide Cells

“…Çelikbilek et al. have proposed a steady‐state 3D model for hierarchically nanostructured composite electrode considering a mechanism based on the bulk path. For our best knowledge, only Kim et al.…”

“…For example, Çelikbilek et al. have shown that the polarization resistance at 500 °C of nanostructured composite electrode is highly sensitive to the porosity with a minimum at around 20 % for a composition of LSCF:CGO = 43:57 wt.%. As a consequence, the composition, the porosity and the particle size are expected to affect the electrode global performances by changing the effective ionic/electronic conductivity, gas diffusivity and the active sites for the electrode reactions (i.e., density of TPBls and specific surface area).…”

Enhanced catalytic activity of nanostructured, A-site deficient (La0.7Sr0.3)0.95(Co0.2Fe0.8)O3−δ for SOFC cathodes

“…The porosity, specific surface area and tortuosity within the columnar blocks of LSCF films sintered at 800 °C for 2h were previously calculated from reconstructed FIB-SEM images. 16 The small-scale features gave specific surface area values of as high as 19 ± 6 µm -1 , porosity values within 22 ± 7 %, and tortuosity values of 1.50 ± 0.2. In this study, the film sintering temperature was set at 900 °C, as the sealing procedure for full fuel cell tests required heating the cells to 800 °C for 100 h. From the SEM images, higher sintering temperature appeared to increase the particle size slightly, but the porosity remained similar.…”

“…The films deposited by the electrostatic spray deposition (ESD) technique have so far shown one of the lowest area specific resistance (ASR) values in the literature, recording 0.021 and 0.065 Ω cm 2 at 650 and 600 °C, respectively at OCV. 16 Microstructural features at the nanometre length scale are amongst the key factors for improved electrode performance. However, the enhanced catalytic behaviour of our LSCF cathode cannot be solely explained by the microstructure.…”

Oxygen Reduction Reaction Electrocatalysis in Alkaline Electrolyte on Glassy-Carbon-Supported Nanostructured Pr6O11 Thin-Films

“…Pr 6 O 11 films have been deposited on glassy-carbon substrates (0.5 mm in diameter, S geometric = 0.196 cm 2 ) by Electrostatic Spray Deposition (ESD), a technique based on the principle of electrostatic atomization [51,[53][54][55][56][57][82][83][84][85][86]. The ESD technique is basically a simple three-step process, as described hereafter.…”