High-Performance Solid-Oxide Fuel Cell Cathodes Based on Cobaltite Nanotubes

Bellino, Martín G.; Sacanell, Joaquín; Lamas, Diego G.; Leyva, and Ana G.; Reca, N.E. Walsöe de

doi:10.1021/ja068115b

Cited by 113 publications

(59 citation statements)

References 19 publications

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“…Nanostructured materials have attracted great interest in low temperature fuel cells for their enhanced kinetic properties [18]. Recently, we reported the synthesis of nanostructured ceria and its application as a catalytic layer on the anode side of a SOFC [19,20].…”

Section: Introductionmentioning

confidence: 99%

Studies on Composite Cathode with Nanostructured Ce_0.9Sm_0.1O_1.95 for Intermediate Temperature Solid Oxide Fuel Cells

Xiao

Jiang

et al. 2009

Fuel Cells

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A kind of nanostructured Ce0.9Sm0.1O1.95 is prepared by a hydrothermal method. It exhibits large Brunauer‐Emmett‐Teller area (>120 m2 g–1), open mesoporous structure and nanocrystalline sheets. This material shows high activity for oxygen reduction. An area specific resistance below 0.6 Ω cm2 at 600 °C is achieved when it is mixed with Ag paste as a composite cathode in a symmetric cell. This is attributed to its large triple phase boundary area and good ionic conducting property. The influences of microstructure, doping, loading effects of silver nanoparticles and the temperature dependence on oxygen reduction kinetics are investigated by the impedance spectroscopy. Although some further optimisations are still required, this special Ce0.9Sm0.1O1.95 material reported here exhibits promising features of applications in the composite electrodes for intermediate temperature solid oxide fuel cells (IT‐SOFCs).

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Section: Introductionmentioning

confidence: 99%

Studies on Composite Cathode with Nanostructured Ce_0.9Sm_0.1O_1.95 for Intermediate Temperature Solid Oxide Fuel Cells

Xiao

Jiang

et al. 2009

Fuel Cells

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“…Meanwhile, common I -V measurement or EIS can only obtain variation patterns in a unit cell rather than in the individual cell components. [ 21,22 ] Thus, special voltage probes embedded into the internal TPB are necessary to measure cell components (i.e., anode, electrolyte, and cathode) individually and to obtain their quantitative contributions on cell performance. However, for anode-supported planar SOFCs, the introduction of an internal voltage probe at the TPB within the cell is an immense challenge because of the thin electrolyte, [ 17 ] the active anode, [ 23 ] and the active cathode.…”

mentioning

confidence: 99%

In‐Situ Investigation of Quantitative Contributions of the Anode, Cathode, and Electrolyte to the Cell Performance in Anode‐Supported Planar SOFCs

Guan

Wang

et al. 2014

Advanced Energy Materials

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performance, except for the materials of components when the stack is sealed properly. [11][12][13] Furthermore, the quantitative contributions of the resistance sources of components to stack performance were obtained by our group. We concluded that stack performance is signifi cantly affected by cell performance itself when excellent stack sealing and contact among internal components are provided. [ 14 ] Therefore, further improvement of cell performance (i.e., reducing cell resistance) and unit cell stability is crucial for SOFC stacks.Anode-supported planar SOFCs are widely used because of their superior performance and multi-layered structure that comprises several components (supported anode, anode function layer, electrolyte, and active cathode). [ 15,16 ] Thus, a quantitative understanding of how the cell components affect cell performance can function as a guide in optimizing cell performance. Accordingly, traditional methods, such as electrochemical impedance spectroscopy (EIS) and current-voltage ( I -V ) measurement, have been generally applied to investigate factors that affect cell performance using external probes placed on both sides of a unit cell. [17][18][19][20] However, traditional measurements do not distinguish between the quantitative effects of cell components on cell performance and degradation mechanisms. These effects result from complex physical and chemical processes at the triple-phase boundary (TPB) within the cell. Meanwhile, common I -V measurement or EIS can only obtain variation patterns in a unit cell rather than in the individual cell components. [ 21,22 ] Thus, special voltage probes embedded into the internal TPB are necessary to measure cell components (i.e., anode, electrolyte, and cathode) individually and to obtain their quantitative contributions on cell performance. However, for anode-supported planar SOFCs, the introduction of an internal voltage probe at the TPB within the cell is an immense challenge because of the thin electrolyte, [ 17 ] the active anode, [ 23 ] and the active cathode. [ 24 ] Consequently, an in situ investigation of the quantitative contributions of components (i.e., anode, electrolyte, and cathode) to cell performance has not been reported for anode-supported planar SOFCs.In the present work, a novel in situ measurement technique is developed according to the conventional structure of anode-supported SOFCs. Pt voltage probes are embedded into A novel method that embeds Pt voltage probes into the triple-phase boundary (TPB) is developed. Moreover, the quantitative contributions of the anode, the cathode, and the electrolyte to cell performance are investigated in situ for anode-supported planar solid oxide fuel cells (SOFCs). The voltage and maximum output power density (MOPD) measured by the probes, which are placed on both sides of the electrolyte, account for 97.3% and 94.4%, respectively, of those of the cell during the instantaneous current-voltage testing. When the stack is discharged at 0.32 A cm −2 for 200 h, the voltage drops of the an...

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“…Solid state ionics is extremely important for the development of all-solid-state batteries [40] . Figure 10 shows solid-state cyclic voltammetric response of PB powder sandwiched between two ITO electrodes or two gold-coated ITO electrodes.…”

Section: Solid-state Two-electrode Cyclic Voltammetric Behaviors Of Pmentioning

confidence: 99%

Electrochemical quartz crystal microbalance study on the two-electrode-system cyclic voltammetric behavior of Prussian blue films

Tan

Xie

Huang

et al. 2008

Sci. China Ser. B-Chem.

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A two-channel electrochemical quartz crystal microbalance (EQCM) was used to investigate the cyclic voltammetric behavior of two Prussian blue (PB) film-modified Au electrodes in a two-electrode configuration in aqueous solution. The redox peaks observed in the two-electrode cyclic voltammogram (CV) are assigned to the intrinsic redox transitions among the Everitt's salt, PB, and Prussian yellow for the film itself, the redox process of the Au substrate and the redox process of small-quantity ferri-/ferrocyanide impurities entrapped in the PB film, as also supported by ultraviolet-visible (UV-Vis) spectroelectrochemical data. The profile of the two-electrode solid-state CV for the PB powder sandwiched between two gold-coated indium-tin oxide (ITO) electrodes is similar to that for two PB-modified Au electrodes in aqueous solution, implying similar origins for the corresponding redox peaks. The two-channel EQCM method is expected to become a highly effective technique for the studies of the two-electrode electrochemical behaviors of many other species/materials. Prussian blue (PB), two-electrode liquid-/solid-state cyclic voltammetric behavior, two-channel electrochemical quartz crystal microbalance, UV-Vis spectroelectrochemistry

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High-Performance Solid-Oxide Fuel Cell Cathodes Based on Cobaltite Nanotubes

Abstract: A new generation of nanostructured cathodes for intermediate temperature solid-oxide fuel cells, with very low polarization resistance, is presented. They were prepared from cobaltite nanotubes using a fast and simple method that allows the retention of the original nanostructure.

Cited by 113 publications

References 19 publications

Studies on Composite Cathode with Nanostructured Ce_0.9Sm_0.1O_1.95 for Intermediate Temperature Solid Oxide Fuel Cells

Studies on Composite Cathode with Nanostructured Ce_0.9Sm_0.1O_1.95 for Intermediate Temperature Solid Oxide Fuel Cells

In‐Situ Investigation of Quantitative Contributions of the Anode, Cathode, and Electrolyte to the Cell Performance in Anode‐Supported Planar SOFCs

Electrochemical quartz crystal microbalance study on the two-electrode-system cyclic voltammetric behavior of Prussian blue films

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High-Performance Solid-Oxide Fuel Cell Cathodes Based on Cobaltite Nanotubes

Abstract: A new generation of nanostructured cathodes for intermediate temperature solid-oxide fuel cells, with very low polarization resistance, is presented. They were prepared from cobaltite nanotubes using a fast and simple method that allows the retention of the original nanostructure.

Cited by 113 publications

References 19 publications

Studies on Composite Cathode with Nanostructured Ce0.9Sm0.1O1.95 for Intermediate Temperature Solid Oxide Fuel Cells

Studies on Composite Cathode with Nanostructured Ce0.9Sm0.1O1.95 for Intermediate Temperature Solid Oxide Fuel Cells

In‐Situ Investigation of Quantitative Contributions of the Anode, Cathode, and Electrolyte to the Cell Performance in Anode‐Supported Planar SOFCs

Electrochemical quartz crystal microbalance study on the two-electrode-system cyclic voltammetric behavior of Prussian blue films

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Resources

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Studies on Composite Cathode with Nanostructured Ce_0.9Sm_0.1O_1.95 for Intermediate Temperature Solid Oxide Fuel Cells

Studies on Composite Cathode with Nanostructured Ce_0.9Sm_0.1O_1.95 for Intermediate Temperature Solid Oxide Fuel Cells