Characteristics of nano La0.6Sr0.4Co0.2Fe0.8O3−δ-infiltrated La0.8Sr0.2Ga0.8Mg0.2O3−δ scaffold cathode for enhanced oxygen reduction

Yoon, Byoung Young; Bae, Joongmyeon

doi:10.1016/j.ijhydene.2013.07.087

Cited by 19 publications

(5 citation statements)

References 19 publications

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“…However, when it mixed with carbon black, it was dispersed. It was reported that nano particle shows different movement in the other material [8,13]. Though they was not blended with the other components, it is connected to binding material [21].…”

Section: Resultsmentioning

confidence: 99%

“…If the loading amount was insufficient, it could not show enough performance. In the future, it is necessary to optimize the loading amount of the catalysts in scaffold anode substrate [8,11,16].…”

Section: Discussionmentioning

confidence: 99%

“…The tape-casting process has been focused for its possibility of the mass production and large-area unit cell fabrication [6]. The infiltration method was reported that it has advantages in the enhancement of catalytic activity, ionic / electronic conductivity and durability due to fine dispersion of the particles and porosity for fuel and product gases [7][8][9]. The conventional tape-casting process casts the anode supported green tape mixed with anode material Ni and electrolyte material YSZ(Ytterium stabilized zirconia) [10].…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of the Anode Supported Solid Oxide Fuel Cells by Tape-Casting Process and Infiltration Method

Kwon

Han

2018

KEM

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The hydrogen is promising energy carrier due to its high energy density, convenient transportation, eternal sources in the earth and cleanness. Solid oxide fuel cells (SOFCs) have not been commercialized yet even though it has been studied for decades. The issues about solid oxide fuel cells are manufacturing process and electrochemical performance. Tape-casting process has an advantage of cost reduction for mass production. it is reported that infiltration improves electrochemical performance of SOFCs by enhancing the three phase boundary (TPB) and porosity. To fabricate the electrode with porous scaffold structure for infiltration, pore formers were added in the tape-casting slurry. In this study, four types of mixtures of several pore formers such as carbon black, graphite, poly methyl methacrylate and glassy carbon were estimated. Micro structure of each type is investigated through scanning electron microscope (SEM). The thickness of the unit cell manufactured by tape-casting is in the range of 200 - 250 μm. The fabricated unit cell with carbon black and glassy carbon shows the open circuit voltage 1.07 V at 800°C. As a result of the study, mixed ratio of pore formers was researched for Solid Oxide Fuel Cells manufacturing process applied by tape-casting and infiltration method.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fabrication of the Anode Supported Solid Oxide Fuel Cells by Tape-Casting Process and Infiltration Method

Kwon

Han

2018

KEM

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“…Many composite electrodes have been studied as OER catalysts for SOECs, such as LSCFO-LaSrGaO 4 (LSGO) oxygen electrodes [50], in which LSGO was used as the scaffold, and the LSCFO nanoparticles (~100 nm) were homogeneously coated on to the LSGO scaffold surface. The cathode polarization resistance for the LSCFO-LSGO cathode was lower than that of pure LSCFO.…”

Section: Composite Perovskitementioning

confidence: 99%

Cobalt-Based Perovskite Electrodes for Solid Oxide Electrolysis Cells

et al. 2022

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Recently, many efforts and much attention has been paid to developing environmentally friendly energy. Solid oxide electrolyte cells (SOECs) process in reverse to solid oxide fuel cells (SOFCs) producing hydrogen gas as a green energy source. However, in this application, high-performance catalysts are usually required to overcome the sluggish oxygen evolution reactions (OER) during water decomposition. For this reason, discovery of catalysts with high performance is a crucial issue for the wide application of SOECs. Owning to their inherent activity and adequate stability in electrochemical conditions, perovskite oxides have been intensively employed in SOECs. In this mini review, we summarize the currently available studies concerning the applications of cobalt-based perovskite oxide catalysts in SOECs. Particularly, their structural properties and corresponding electronic structures are discussed based on their electrochemical performance, both experimentally and theoretically.

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“…Due to the relatively high activation energy required for the oxygen reduction reaction, the electrochemical resistance of SOFC components, particularly the cathode, will increase with decreasing operating temperature (ORR) [10]. Therefore, many researchers make great efforts to reduce the cathode's polarization resistance (Rp) to improve the cathode's performance [11,12]. One of the practical and cost-effective approaches for cathode surface modification through wet chemical infiltration can increase catalytic activity [13].…”

Section: Introductionmentioning

confidence: 99%

Effect of Infiltration Ce0.8Sm0.2O1.9 Against Double Perovskite Performance LaBa0.5Sr0.5Co2O5+δ as IT-SOFC Cathode

Subardi

2022

J. Kim. Sains Apl.

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Modifying the sample surface by infiltration technique using Ce0.8Sm0.2O1.9 (SDC) electrolyte has been done to increase the catalytic activity of the LaBa0.5Sr0.5Co2O5+δ (LBSC) cathode. The cathode powder structure was evaluated using X-ray diffraction (XRD) at room temperature, and the LBSC cathode microstructure was analyzed using scanning electron microscopy (SEM). The electrical conductivity of the LBSC cathode was tested using the four-probe DC method. Symmetrical cells were tested using a potentiostat Voltalab PGZ 301 and a digital source meter Keithley 2420. LBSC powder was discovered to have a tetragonal structure (space group: P4/mmm) with lattice parameters of a = 3.86253 Å, c = 7.73438 Å, and V = 115.338 Å. From the SEM image, the LBSC cathode has homogeneous, dense, and highly porous grains. The electrical conductivity showed metallic behavior, gradually decreasing from 167 S.cm-1 at 300℃ to 105 S.cm-1 at 800℃. A significant increase in current density (io) of 275% occurred at 800℃ from 154.10 mA.cm−2 (pure LBSC) to 577.86 mA.cm−2 (LBSC+0.5M SDC). The activation energy value (Ea) of symmetrical cells was determined using electrochemical impedance spectroscopy (EIS), low-field (LF), and high-field (HF) techniques. The activation energy of the LBSC+0.5 M SDC specimen was 47.9 kJ mol-1 or 79.4% lower than the activation energy of the LBSC cathode specimen without infiltration at atmospheric pressure of 0.03 atm. These results indicate that SDC infiltration of the LBSC cathode can reduce the activation energy of the signiﬁcant. The cathode membrane adheres quite well to the electrolyte membrane, the cathode porosity varies in the range of 1–4 µm, and the grain size is 0.1–1.5 µm.

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Characteristics of nano La0.6Sr0.4Co0.2Fe0.8O3−δ-infiltrated La0.8Sr0.2Ga0.8Mg0.2O3−δ scaffold cathode for enhanced oxygen reduction

Cited by 19 publications

References 19 publications

Fabrication of the Anode Supported Solid Oxide Fuel Cells by Tape-Casting Process and Infiltration Method

Fabrication of the Anode Supported Solid Oxide Fuel Cells by Tape-Casting Process and Infiltration Method

Cobalt-Based Perovskite Electrodes for Solid Oxide Electrolysis Cells

Effect of Infiltration Ce0.8Sm0.2O1.9 Against Double Perovskite Performance LaBa0.5Sr0.5Co2O5+δ as IT-SOFC Cathode

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