Chemical Bulk Diffusion Coefficient of a <scp><scp>La</scp></scp>0.5<scp><scp>Sr</scp></scp>0.5<scp><scp>CoO</scp></scp>3−δ Cathode for Intermediate‐Temperature Solid Oxide Fuel Cells

Fu, Yen−Pei; Hsieh, Min-Yen

doi:10.1111/jace.13115

Cited by 6 publications

(11 citation statements)

References 56 publications

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“…However, these values are still acceptable to apply to the cathode for IT‐SOFC. Based on our previous study, the TEC value of SDC is 12.37 ppm/K, the LSCO(Cu) is 19.75 ppm/K. There is a large difference in TEC values between cathode and electrolyte.…”

Section: Resultsmentioning

confidence: 87%

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Electrochemical Properties of La_0.5Sr_0.5Co_0.8M_0.2O_3–δ (M=Mn, Fe, Ni, Cu) Perovskite Cathodes for IT‐SOFCs

Subardi

Hsieh

et al. 2016

J. Am. Ceram. Soc.

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The electrochemical properties of La 0.5 Sr 0.5 Co 0.8 M 0.2 O 3-d (M=Mn, Fe, Ni, Cu) cathodes are investigated with chemical bulk diffusion coefficients (D chem ) and polarization resistances. The electrochemical performance of long-term testing for La 0.5 Sr 0.5 Co 0.8 Cu 0.2 O 3-d cathode was carried out to investigate its electrochemical stability. In this work, an anode-supported single cell with a thick-film SDC electrolyte (30 lm), a Ni-SDC cermet anode (1 mm), and a La 0.5 Sr 0.5 Co 0.8 Cu 0.2 O 3-d cathode (10 lm) reaches a maximum peak power density of 983 mW/cm 2 at 700°C. Obviously, Cu substitution for B-site of La 0.5 Sr 0.5 CoO 3-d cathode reduced thermal expansion coefficient (TEC) value and enhanced oxygen bulk diffusion and electrochemical properties. La 0.5 Sr 0.5 Co 0.8 Cu 0.2 O 3-d is a promising cathode material for intermediate temperature solid oxide fuel cells (IT-SOFC). J. Stevenson-contributing editor Manuscript No. 37447.

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Section: Resultsmentioning

confidence: 87%

“…The values for D chem could be determined by fitting the ECR curves . The experimental details have been reported in an earlier publication …”

Section: Methodsmentioning

confidence: 99%

Electrochemical Properties of La_0.5Sr_0.5Co_0.8M_0.2O_3–δ (M=Mn, Fe, Ni, Cu) Perovskite Cathodes for IT‐SOFCs

Subardi

Hsieh

et al. 2016

J. Am. Ceram. Soc.

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“…Moreover, the temperature dependance of the R p is shown in Figure 3b. [19,[28][29][30] The R p of the MC-anode is one third to one fiftieth lower than those of several reported SL-anodes at 800 °C, indicating such MC-anode has obviously [13] SL LSC-GDC (Gd 0.2 Ce 0.8 O 1.9 ) anode, [29] and SL LSC-SDC (Sm 0.2 Ce 0.8 O 2-δ ) anode. [30] c) Time dependance curve of overpotential of MC-anode and SL-anode under different current densities at 800 °C.…”

Section: Enhanced Electrochemical Activity and Durability Of The Micr...mentioning

confidence: 99%

“…Comparison of the electrochemical performance of the two types of anodes and SOECs: a) EIS of SL-anode and MC-anode. b) Temperature dependence of R p of different anodes: MC-anode, SL-anode in our work, SL LSC-YSZ anode,[13] SL LSC-GDC (Gd 0.2 Ce 0.8 O 1.9 ) anode,[29] and SL LSC-SDC (Sm 0.2 Ce 0.8 O 2-δ ) anode [30]. c) Time dependance curve of overpotential of MC-anode and SL-anode under different current densities at 800 °C.…”

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confidence: 92%

A Novel Solid Oxide Electrolysis Cell with Micro‐/Nano Channel Anode for Electrolysis at Ultra‐High Current Density over 5 A cm⁻²

Cao

Zheng

et al. 2022

Advanced Energy Materials

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Solid oxide electrolysis cells (SOECs) are regarded as promising candidates for the next generation of energy conversion device due to their extremely high conversion efficiency. However, the electrolysis current density should be further increased to meet the demands of large‐scale industrial application in the future. Here, a novel anode configuration for SOEC is reported that achieves an ultra‐high current density of 5.73 A cm−2 for at least 4 h. To the best of the authors’ knowledge, such current density surpasses the record of present state‐of‐the‐art research. The unique stability under such high current density is attributed to the novel SOEC constructed with a La0.6Sr0.4CoO3−δ anode catalyst nano‐layer to promote oxygen generation, vertically aligned micro channel anode scaffold to accelerate oxygen release, and integrated anode–electrolyte interface to improve the interfacial strength. The novel SOEC successfully demonstrates stable steam electrolysis under an ultra‐high current density of 5.96 A cm−2 at 800 °C under the constant operating voltage of 1.3 V, corresponding to a hydrogen production rate of 2.5 L h−1 cm−2.

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“…[35][36][37][38][39] In this study, the transition element of Cu was incorporated into the layered perovskite LaSrCo 2 O 5+δ to search the high performance cathode for IT-SOFCs, LaSrCo 1.6 Cu 0.4 O 5+δ cathode was infiltrated with nano-sized Ce 0.8 Sm 0.2 O 1.9 electrolyte particles to improve cathode performance and the anode-supported single fuel cell with pulsed laser deposited bi-layer Ce 0.8 Sm 0.2 O 1.9 electrolyte was set up to measure current-voltage curves and evaluate performances.…”

mentioning

confidence: 99%

Double Perovskite LaSrCo_1.6Cu_0.4O_5-δCathode for IT-SOFCs with Pulsed Laser Technique Deposited Bi-Layer Electrolyte

Chen

Hsieh

et al. 2015

J. Electrochem. Soc.

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This study included two parts: (1) the structural characteristics, chemical stability, thermal expansion coefficient (TEC), chemical bulk diffusion coefficient (D chem ), chemical surface exchange coefficient (k chem ), electrochemical performance and single cell performance for LaSrCo 1.6 Cu 0.4 O 5+δ as an intermediate-temperature solid oxide fuel cells (IT-SOFC) cathode material, and (2) using a pulsed laser technique (PLD) deposited a dense Ce 0.8 Sm 0.2 O 1.9 (SDC) thin layer on thick SDC as bi-layer electrolyte and infiltrating SDC nanoparticles onto LaSrCo 1.6 Cu 0.4 O 5+δ skeleton to improve the performance of the single cell. The single cell assembling with 0.5M SDC-infiltrated LaSrCo 1.6 Cu 0.4 O 5+δ cathode and PLD-deposited SDC/SDC bilayer have shown very good performance at low operating temperatures.Currently, solid oxide fuel cells (SOFCs) have attracted a great deal of attention due to the advantages of high electrical efficiency, fuel versatility, low-pollutant emission, etc. 1-3 However, a high operating temperatures limits the application of SOFCs and lowers operating temperature to around 600 • C is primary goal in current SOFC research. Lately, research efforts have been devoted to decreasing a high operating temperature. Electrolyte materials with high ionic conductivity, such as Samaria-doped ceria (SDC), 4 bismuth oxides, 5 and lanthanum strontium gallate magnesite (LSGM) 6 have received attention for intermediate temperature SOFCs. SDC is considered one of the most promising materials for SOFCs. Its conductivity is 2-3 times greater than that of yttria stabilized zirconia (YSZ). 7 Nevertheless, one main limitation of the SDC electrolyte is the reduction of Ce 4+ to Ce 3+ induces n-type electronic conduction, which tends to decrease the open circuit voltage (OCV) and a consequent decrease in the overall power output. [8][9][10][11] The problem can be eliminated by incorporating dense and thin SDC on surface of thick SDC electrolyte as a blocking layer to improve the stability of the SDC electrolyte under the reducing environment and inhibit electronic current leakage. The pulsed laser deposition (PLD) technique is a promising method that offers better control of the deposited film properties, such as microstructures, density and stoichiometric with multi-component materials. 12,13 Furthermore, the PLD technique can operate at a low processing temperature without high post-annealing temperature, 14 which is useful for low temperature SOFC applications. Therefore, we researched lower heating temperature (600 • C) for the PLD procedure to fabricate dense and thin SDC layers on thick SDC electrolytes prepared by a solidstate reaction. In this paper, we used a simpler approach that uses a highly conductive and chemically stable on conductor electrolyte was developed by protecting a sintered SDC pellet with a thin SDC layer. The overall performance of the bilayer electrolyte turned out to be of great interest. The bilayer electrolyte was fabricated using a 1 mm thick pellet of anode-supported SD...

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Chemical Bulk Diffusion Coefficient of a La_0.5Sr_0.5CoO_3−δ Cathode for Intermediate‐Temperature Solid Oxide Fuel Cells

Cited by 6 publications

References 56 publications

Electrochemical Properties of La_0.5Sr_0.5Co_0.8M_0.2O_3–δ (M=Mn, Fe, Ni, Cu) Perovskite Cathodes for IT‐SOFCs

Electrochemical Properties of La_0.5Sr_0.5Co_0.8M_0.2O_3–δ (M=Mn, Fe, Ni, Cu) Perovskite Cathodes for IT‐SOFCs

A Novel Solid Oxide Electrolysis Cell with Micro‐/Nano Channel Anode for Electrolysis at Ultra‐High Current Density over 5 A cm⁻²

Double Perovskite LaSrCo_1.6Cu_0.4O_5-δCathode for IT-SOFCs with Pulsed Laser Technique Deposited Bi-Layer Electrolyte

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Chemical Bulk Diffusion Coefficient of a La0.5Sr0.5CoO3−δ Cathode for Intermediate‐Temperature Solid Oxide Fuel Cells

Cited by 6 publications

References 56 publications

Electrochemical Properties of La0.5Sr0.5Co0.8M0.2O3–δ (M=Mn, Fe, Ni, Cu) Perovskite Cathodes for IT‐SOFCs

Electrochemical Properties of La0.5Sr0.5Co0.8M0.2O3–δ (M=Mn, Fe, Ni, Cu) Perovskite Cathodes for IT‐SOFCs

A Novel Solid Oxide Electrolysis Cell with Micro‐/Nano Channel Anode for Electrolysis at Ultra‐High Current Density over 5 A cm−2

Double Perovskite LaSrCo1.6Cu0.4O5-δCathode for IT-SOFCs with Pulsed Laser Technique Deposited Bi-Layer Electrolyte

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Product

Resources

About

Chemical Bulk Diffusion Coefficient of a La_0.5Sr_0.5CoO_3−δ Cathode for Intermediate‐Temperature Solid Oxide Fuel Cells

Electrochemical Properties of La_0.5Sr_0.5Co_0.8M_0.2O_3–δ (M=Mn, Fe, Ni, Cu) Perovskite Cathodes for IT‐SOFCs

Electrochemical Properties of La_0.5Sr_0.5Co_0.8M_0.2O_3–δ (M=Mn, Fe, Ni, Cu) Perovskite Cathodes for IT‐SOFCs

A Novel Solid Oxide Electrolysis Cell with Micro‐/Nano Channel Anode for Electrolysis at Ultra‐High Current Density over 5 A cm⁻²

Double Perovskite LaSrCo_1.6Cu_0.4O_5-δCathode for IT-SOFCs with Pulsed Laser Technique Deposited Bi-Layer Electrolyte