The effect of co-dopant addition on the properties of Ln0.2Ce0.8O2−δ (Ln=Gd, Sm, La) solid-state electrolyte

Pikalova, E. Yu.; Maragou, V.; Demina, A. N.; Demin, A.; Tsiakaras, Panagiotis

doi:10.1016/j.jpowsour.2008.02.003

Cited by 71 publications

(22 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This is in good agreement with literature [24,31]. With the introduction of SDC into LBCO, the TEC decreases greatly from 27.8×10 −6 to 14.36×10 −6 K −1 , which is mainly attributed to the lower TEC of the solid electrolyte SDC (about 12.3×10 −6 K −1 ) [33]. The lower TEC of the dual-phase membrane is beneficial to the mechanical structure stability and the sealing with other components in practical application.…”

Section: Oxygen Permeation Flux Measurementsupporting

confidence: 91%

Oxygen permeability of Ce0.8Sm0.2O2 − δ–LnBaCo2O5 + δ (Ln=La, Nd, Sm, and Y) dual-phase ceramic membranes

Chen

Zhao

Xie

et al. 2014

Ionics

View full text Add to dashboard Cite

Ce 0.8 Sm 0.2 O 2 − δ -LnBaCo 2 O 5 + δ (SDC-LnBCO, Ln=La, Nd, Sm, and Y) composites were prepared and characterized as dense ceramic membranes for oxygen separation. Ce 0.8 Sm 0.2 O 2−δ (SDC) shows a good chemical compatibility with LaBaCo 2 O 5+δ (LBCO), NdBaCo 2 O 5+δ (NBCO), and SmBaCo 2 O 5+δ (SBCO), while a little of impurity is detected in the sample with YBaCo 2 O 5+δ (YBCO). The SDC-SBCO and SDC-YBCO samples exhibit larger grain size than SDC-LBCO and SDC-NBCO. The incorporation of SDC increases the structural stability and decreases the thermal expansion coefficient of LnBCO at high temperature. The oxygen permeation flux of SDC-LnBCO dual-phase membrane decreases with decreasing Ln 3+ radius, which is 2.57×10 −7 , 1.58×10 −7 , 8.05×10 −8 , and 7.57×10 −8 mol cm −2 s −1 at 925°C for SDC-LBCO, SDC-NBCO, SDC-SBCO, and SDC-YBCO membranes, respectively. Increasing the flow rate of feeding and sweeping gas can create oxygen partial pressure gradient, and thus, increase the oxygen permeability. These results indicate that SDC-LBCO and SDC-NBCO composites are promising candidates for oxygen permeation membrane.

show abstract

Section: Oxygen Permeation Flux Measurementsupporting

confidence: 91%

Oxygen permeability of Ce0.8Sm0.2O2 − δ–LnBaCo2O5 + δ (Ln=La, Nd, Sm, and Y) dual-phase ceramic membranes

Chen

Zhao

Xie

et al. 2014

Ionics

View full text Add to dashboard Cite

show abstract

“…Low and intermediate temperature SOFCs have received considerable attention recently due to the improved stability, reliability and reduced cost. Moreover, SOFCs' operation at lower temperatures could: (a) enable the use of inexpensive metal components as inter-connects, (b) enhance the stability and durability of all the components and (c) offer the potential of more rapid start-up and shutdown procedure [23].…”

Section: Introductionmentioning

confidence: 99%

Exergy Analysis of an Intermediate Temperature Solid Oxide Fuel Cell-Gas Turbine Hybrid System Fed with Ethanol

et al. 2012

View full text Add to dashboard Cite

Abstract:In the present work, an ethanol fed Solid Oxide Fuel Cell-Gas Turbine (SOFC-GT) system has been parametrically analyzed in terms of exergy and compared with a single SOFC system. The solid oxide fuel cell was fed with hydrogen produced from ethanol steam reforming. The hydrogen utilization factor values were kept between 0.7 and 1. The SOFC's Current-Volt performance was considered in the range of 0.1-3 A/cm 2 at 0.9-0.3 V, respectively, and at the intermediate operating temperatures of 550 and 600 °C, respectively. The curves used represent experimental results obtained from the available bibliography. Results indicated that for low current density values the single SOFC system prevails over the SOFC-GT hybrid system in terms of exergy efficiency, while at higher current density values the latter is more efficient. It was found that as the value of the utilization factor increases the SOFC system becomes more efficient than the SOFC-GT system over a wider range of current density values. It was also revealed that at high current density values the increase of SOFC operation temperature leads in both cases to higher system efficiency values.

show abstract

“…[19,20], and Sm 0.5 Sr 0.5 CoO 3 − δ (20.8×10 −6 K −1 ) [21], the average TEC value of LBFN is much lower. In LBFN, the redox behavior of the iron ions is not as flexible as that of cobalt ions [22], which can offer a better thermal expansion match to the SDC electrolyte (TEC~12.3 × 10 −6 K −1 ) [23] and minimize the occurrence of delamination or crack in the cathode-electrolyte interface.…”

Section: Resultsmentioning

confidence: 99%

Characterization and performance of cobalt-free perovskite-type La0.6Ba0.4Fe0.8Ni0.2O3 − δ cathode material for intermediate-temperature solid oxide fuel cells

Jin

Yuan

Chen

et al. 2015

Ionics

View full text Add to dashboard Cite

A novel cobalt-free perovskite La 0.6 Ba 0.4 Fe 0.8 Ni 0.2 O 3 − δ (LBFN) powder was synthesized using a combustion method. The phase composition, electrical conductivity, thermal expansion coefficient (TEC), and electrochemical properties of LBFN were systematically investigated. The X-ray diffraction (XRD) results revealed that LBFN had a high chemical compatibility with Ce 0.8 Sm 0.2 O 2 − δ (SDC). The LBFN cathode exhibited a competitive electrode area-specific resistance (ASR) for the symmetric cell based on SDC electrolyte. Furthermore, the electrochemical performance of LBFN cathode could be effectively improved with the addition of the proper amount of SDC. Using the LBFN-SDC73 (7:3 in weight ratio) as a composite cathode, the Ni-SDC-supported single cell with a 25-μm-thick SDC electrolyte exhibited maximum power densities of 330, 216, and 119 mW cm −2 at 600, 550, and 500°C, respectively.

show abstract

The effect of co-dopant addition on the properties of Ln0.2Ce0.8O2−δ (Ln=Gd, Sm, La) solid-state electrolyte

Cited by 71 publications

References 21 publications

Oxygen permeability of Ce0.8Sm0.2O2 − δ–LnBaCo2O5 + δ (Ln=La, Nd, Sm, and Y) dual-phase ceramic membranes

Oxygen permeability of Ce0.8Sm0.2O2 − δ–LnBaCo2O5 + δ (Ln=La, Nd, Sm, and Y) dual-phase ceramic membranes

Exergy Analysis of an Intermediate Temperature Solid Oxide Fuel Cell-Gas Turbine Hybrid System Fed with Ethanol

Characterization and performance of cobalt-free perovskite-type La0.6Ba0.4Fe0.8Ni0.2O3 − δ cathode material for intermediate-temperature solid oxide fuel cells

Contact Info

Product

Resources

About