Co-electrolysis of steam and carbon dioxide in large area solid oxide cells based on infiltrated mesoporous oxygen electrodes

Anelli, Simone; Hernández, Elba; Bernadet, Lucile; Sun, Xiufu; Hagen, Anke; Baiutti, Federico; Torrell, Marc; Tarancón, Albert

doi:10.1016/j.jpowsour.2020.228774

Cited by 19 publications

(24 citation statements)

References 91 publications

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“…Conversely, good penetration of the LSCF phase inside the CGO scaffold in the case of the 10-CGO and 10-CGO meso cells with the fast process has been demonstrated. These results show better functionalization of the scaffold compared with traditional infiltration via micropipette injection reported in previous work of the group [35,37]. (c,d)), the 10-CGO cell (panels (e,f)) and the 10-CGOmeso cell (panels (g,h).…”

Section: Fabrication Of the Symmetrical Cellssupporting

confidence: 65%

“…After the complete dissolution of PVP and glycine, the precursors were added one by one, under continuous stirring. The formulation of the LSCF sol-gel solution was optimized for handmade infiltration in previous works of the group to achieve good permeability inside the ceramic backbone [35][36][37].…”

Section: Formulation Of Lscf Inksmentioning

confidence: 99%

“…In particular, nanocomposites based on mesoporous ceria backbones demonstrate excellent performance as electrodes for SOC applications [21][22][23][24]. Mesoporous materials are characterized by small porosity (2-50 nm in diameter), a high surface area (>100 m 2 g −1 ) [25][26][27], and good percolation pathways, which mitigate problems associated with local high current densities in SOC operation [28][29][30][31][32][33][34][35][36][37]. The synthesis of mesoporous materials typically involves the impregnation of sacrificial templates such as SiO 2 that, after calcination, are removed by chemical etching.…”

Section: Introductionmentioning

confidence: 99%

“…Despite the above-mentioned advantages, infiltration is currently carried out manually with a micro-pipette [19,37,[42][43][44][45][46][47][48][49] or via dip coating [50,51], compromising its reproducibility, robustness and scalability. The implementation of additive manufacturing (AM) techniques for the automation of infiltration steps, in particular using inkjet printing (IJP), is a possible solution to standardize the process [52][53][54][55][56][57][58].…”

Section: Introductionmentioning

confidence: 99%

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Solid Oxide Cell Electrode Nanocomposites Fabricated by Inkjet Printing Infiltration of Ceria Scaffolds

et al. 2021

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The enhancement of solid oxide cell (SOC) oxygen electrode performance through the generation of nanocomposite electrodes via infiltration using wet-chemistry processes has been widely studied in recent years. An efficient oxygen electrode consists of a porous backbone and an active catalyst, which should provide ionic conductivity, high catalytic activity and electronic conductivity. Inkjet printing is a versatile additive manufacturing technique, which can be used for reliable and homogeneous functionalization of SOC electrodes via infiltration for either small- or large-area devices. In this study, we implemented the utilization of an inkjet printer for the automatic functionalization of different gadolinium-doped ceria scaffolds, via infiltration with ethanol:water-based La1−xSrxCo1−yFeyO3−δ (LSCF) ink. Scaffolds based on commercial and mesoporous Gd-doped ceria (CGO) powders were used to demonstrate the versatility of inkjet printing as an infiltration technique. Using yttrium-stabilized zirconia (YSZ) commercial electrolytes, symmetrical LSCF/LSCF–CGO/YSZ/LSCF–CGO/LSCF cells were fabricated via infiltration and characterized by SEM-EDX, XRD and EIS. Microstructural analysis demonstrated the feasibility and reproducibility of the process. Electrochemical characterization lead to an ASR value of ≈1.2 Ω cm2 at 750 °C, in the case of nanosized rare earth-doped ceria scaffolds, with the electrode contributing ≈0.18 Ω cm2. These results demonstrate the feasibility of inkjet printing as an infiltration technique for SOC fabrication.

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Section: Fabrication Of the Symmetrical Cellssupporting

confidence: 65%

Section: Formulation Of Lscf Inksmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Solid Oxide Cell Electrode Nanocomposites Fabricated by Inkjet Printing Infiltration of Ceria Scaffolds

et al. 2021

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“…23 Scalability and compatibility with large area cell fabrication processes have also been shown. 24 Interestingly, recent studies have brought to the fore Pr-doped ceria as a potential high-temperature cathode material owing to the mixed Pr 3+ /Pr 4+ valence in oxidizing conditions, leading to mixed conductivity. 25 While such results confirm the remarkable technological relevance of the material, an in-depth investigation of nanocasted ceria is missing.…”

Section: ■ Introductionmentioning

confidence: 99%

Tailoring the Transport Properties of Mesoporous Doped Cerium Oxide for Energy Applications

et al. 2021

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Hard-template nanocasted mesoporous cerium oxide possesses a unique combination of thermal stability, high surface area, and short diffusion lengths for mass and gas transport, which makes it relevant for high-temperature catalysis, sensing, and electrochemical applications. Here, we present an in-depth study of a number of mesoporous doped ceria systems, and we assess their fundamental structure and functionalities by complementary transmission electron microscopy imaging and spectroscopy, electron tomography reconstructions, and electrochemical impedance spectroscopy. We employed surface chemical modifications for increasing the ionic conductivity of as-synthesized mesoporous Gd-doped ceria by 2 orders of magnitude, enabling the ionic pathway across mesoporous particles. Complementary bulk doping strategies (by the addition of Pr) result in the easy tuning of the electrical transport mechanisms converting pure ionic mesoporous ceria into a mixed ionic–electronic conductor. The results obtained here are rationalized in light of local charge accumulation and mobility effects, providing a potential tool for engineering transport properties in nanocasted ceria and similar nanostructured materials for use in energy applications in the form of functional composites, infiltrated structures, or catalytic layers.

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Pulsed electrolysis of carbon dioxide by large‐scale solid oxide electrolytic cells for intermittent renewable energy storage

Han

et al. 2022

Carbon Energy

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CO2 electrolysis with solid oxide electrolytic cells (SOECs) using intermittently available renewable energy has potential applications for carbon neutrality and energy storage. In this study, a pulsed current strategy is used to replicate intermittent energy availability, and the stability and conversion rate of the cyclic operation by a large‐scale flat‐tube SOEC are studied. One hundred cycles under pulsed current ranging from −100 to −300 mA/cm2 with a total operating time of about 800 h were carried out. The results show that after 100 cycles, the cell voltage attenuates by 0.041%/cycle in the high current stage of −300 mA/cm2, indicating that the lifetime of the cell can reach up to about 500 cycles. The total CO2 conversion rate reached 52%, which is close to the theoretical value of 54.3% at −300 mA/cm2, and the calculated efficiency approached 98.2%, assuming heat recycling. This study illustrates the significant advantages of SOEC in efficient electrochemical energy conversion, carbon emission mitigation, and seasonal energy storage.

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Co-electrolysis of steam and carbon dioxide in large area solid oxide cells based on infiltrated mesoporous oxygen electrodes

Cited by 19 publications

References 91 publications

Solid Oxide Cell Electrode Nanocomposites Fabricated by Inkjet Printing Infiltration of Ceria Scaffolds

Solid Oxide Cell Electrode Nanocomposites Fabricated by Inkjet Printing Infiltration of Ceria Scaffolds

Tailoring the Transport Properties of Mesoporous Doped Cerium Oxide for Energy Applications

Pulsed electrolysis of carbon dioxide by large‐scale solid oxide electrolytic cells for intermittent renewable energy storage

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