Stabilization of the cubic perovskite in the system La 1−x Ba x Co 1−y Fe y O 3−δ (0.7 ≤  x  ≤ 0.9) and its electrochemical performance as cathode materials for intermediate-temperature solid oxide fuel cells

Setevich, C.; Prado, F.; Florio, Daniel Z. de; Caneiro, A.

doi:10.1016/j.jpowsour.2013.08.091

Cited by 16 publications

(18 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…246 Although substitution of Fe for Co (i.e., LBCF) improves stability, it also increases R P,C . 320 The Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3Àd (BSCF) perovskite has garnered considerable recent attention, including a recent review, 351 based on its excellent transport properties (see Section 4.1.1) and electrode performance (e.g. R P,C = 0.051-0.071 O cm 2 at 600 1C 39 ).…”

Section: Cathode Performancementioning

confidence: 99%

A perspective on low-temperature solid oxide fuel cells

Gao

Mogni

Miller

et al. 2016

Energy Environ. Sci.

800

440

View full text Add to dashboard Cite

show abstract

Section: Cathode Performancementioning

confidence: 99%

A perspective on low-temperature solid oxide fuel cells

Gao

Mogni

Miller

et al. 2016

Energy Environ. Sci.

800

440

View full text Add to dashboard Cite

show abstract

“…Their properties were studied for the first time by Iwahara and his group [9][10][11]. Since their pioneer investigations, many works on perovskite as proton conducting electrolyte are reported in recent years for intermediate temperature fuel cell or steam electrolysis [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

“…Up to now, trivalent cation -substituted perovskite-type oxides [9][10][11][16][17][18][19][20][21][22][23][24][25][26][27][28][29][41][42][43][44][45][46][47] were reported to show rather good proton conduction above 450 °C. Based on these results, the objective of this paper was to clarify the role of water insertion into SrZr 0.9 Ln 0.1 O 2.95 [48] substituted by lanthanide element (Ln) to optimize proton conduction with respect to perovskite compositions and sintering conditions [49][50][51][52][53][54].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical studies of water insertion and proton – Ceramic interaction in substituted perovskite SrZr 0.9 Ln 0.1 O 2.95

Lacroix¹,

Rahmouni²,

Sirat³

et al. 2014

Journal of Power Sources

View full text Add to dashboard Cite

Because of their high ionic conduction even at relatively low temperatures, proton conducting ceramics are one of the most promising electrolytes for fuel cell. In contrast to oxide-ion conductors, proton-conducting systems, especially in an electrolyser plant, could operate below 600°C, critical temperature for mechanical and hot corrosion resistance of common stainless steels. Proton conduction in perovskite type ceramic was analyzed under the water molecules insertion to maximize proton conduction. To this end, the SrZr 0.9 Ln 0.1 O 2.95 electrolyte and its microstructure, particularly grain size was investigated. The insertion and release of water in the perovskite structure was followed by impedance spectroscopy and by using the so-called Brick Layer Model (BLM) to separate the bulk and grain boundary conductivities. It was found that the conductivity in both zones increases namely with steam pressure. It was also verified that the bulk conductivity is higher than that of grain boundaries. Consequently both the operating steam pressure and the grain size appear as the main parameters that can be tuned to enhance the proton conduction.

show abstract

“…18,19 In the case of the La 1-x Ba x Co 1-y M y O 3-δ compounds, the replacement of Co with Fe or Nb stabilizes the cubic perovskite, although the electrochemical performance of the electrodes is reduced. 20,21 Another issue for perovskites with high Co and Ba contents is the mismatch in the thermal expansion coefficient between them and the electrolytes, which leads to adhesion problems and delamination of the electrode accompanied by the degradation of the cell performance. 22 A commonly adopted strategy to reduce the mismatch is the use of composite materials by mixing the cobaltite and the electrolyte, which reduces the expansion coefficient of the electrode.…”

mentioning

confidence: 99%

Study of the Electrode Polarization Resistance of Cobaltites with High Ba Content as Cathode for IT-SOFC

Setevich

Prado

Caneiro

2017

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

The phase relationships and the electrochemical behavior of cobaltites with high content of Ba, such as, La 1-x Ba x CoO 3-δ with x = 0.5, 0.7 and 1.0, Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ (BSCF) and BaCo 0.7 Fe 0.2 Nb 0.1 O 3-δ (BCFN), were studied by XRD and impedance spectroscopy varying the electrode configurations from a single porous layer to a graded-cathode using Ce 0.9 Gd 0.1 O 1.95 (GDC) as electrolyte. Regardless of the electrode material, symmetrical cells with graded-cathodes displayed the lowest polarization resistance (R p ) values. The minimum R p values were found to be 0.036 and 0.039 cm 2 at 600 • C, in air, for La 0.5 Ba 0.5 CoO 3-δ (LBC) and BSCF, respectively. The impedance spectra reveals mainly two processes, one at intermediate frequency (IF) in the range (0.1 ≤ f ≤ 5 × 10 3 Hz) and another at low frequency (LF) in the range (1 ≤ f ≤ 3 Hz). The variation of the parameter n (obtained from the log(R IF ) vs. log(pO 2 ) plots) in relation with the electrode configuration, indicates the rate-limiting process goes from a mixture of the ion transfer at the electrode/electrolyte interface and the charge transfer at the electrode surface to a mixture between this last process and the dissociation of the oxygen molecule.

show abstract

Stabilization of the cubic perovskite in the system La 1−x Ba x Co 1−y Fe y O 3−δ (0.7 ≤ x ≤ 0.9) and its electrochemical performance as cathode materials for intermediate-temperature solid oxide fuel cells

Cited by 16 publications

References 37 publications

A perspective on low-temperature solid oxide fuel cells

A perspective on low-temperature solid oxide fuel cells

Electrochemical studies of water insertion and proton – Ceramic interaction in substituted perovskite SrZr 0.9 Ln 0.1 O 2.95

Study of the Electrode Polarization Resistance of Cobaltites with High Ba Content as Cathode for IT-SOFC

Contact Info

Product

Resources

About