DC 4-Point Measurement for Total Electrical Conductivity of SOFC Cathode Material

Jo, Kanghee; Ha, Jooyeon; Ryu, Jong-Sik; Lee, Eunkyung; Lee, Heesoo

doi:10.3390/app11114963

Cited by 9 publications

(2 citation statements)

References 19 publications

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“…This reduction occurred due to the lattice defects of the Co-O-Co bonds, resulting in the removal of oxygen atoms from the lattice and the reduction of Co 4+ to Co 3+ or Co 3+ to Co 2+ . The LBSC cathode conductivity value ranged between 100-165 S.cm -1 and met the requirements of a SOFC cathode material [25]. The energy band overlap between Co-3d and O-2p, the presence of Co 4+ ions from the thermally generated Co 3+ charge disproportion, and the loss of oxygen from the lattice at higher temperatures all affect the metallic conductivity of LBSC materials [26,27,28].…”

Section: Figure 1 X-ray Diffraction Pattern Of Sintered Lbsc Cathode ...mentioning

confidence: 89%

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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Section: Figure 1 X-ray Diffraction Pattern Of Sintered Lbsc Cathode ...mentioning

confidence: 89%

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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“…and is usually measured using four-probe conductivity measurements, a technique extensively applied to electronic ceramics and electrochemical materials, including SOC cathodes and electrolytes (Badwal et al, 1991;Vladislav, 2009;Jo et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Conductivity and Transference Number Determination Protocols for Solid Oxide Cell Materials

et al. 2022

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To standardize materials and component characterization for next generation hydrogen production and energy generation solid oxide cell (SOC) technologies, test protocols are being established to facilitate comparison across the numerous laboratories and research institutions where SOC development for application in solid oxide fuel cells (SOFCs) and solid oxide electrolyzes cells (SOEC) is conducted. This paper proposes guiding protocols for fundamental electrical properties characterization of SOC materials, including temperature- and oxygen partial pressure (pO2)-dependent conductivity measurements, and use of the electromotive force for determining the transference numbers, or contributions of each charge carrier (i.e., ions and electrons), to the total conductivity. The protocol for Archimedes density measurements is also provided as an integral technique to both of these methods.

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Investigation of structural, electrical and electrochemical properties of La0.8Sr0.2Mn1−xScxO3−δ as cathode on yttria-stabilized zirconia electrolyte for intermediate temperature solid oxide fuel cell fabricated by one step dry pressing method

Dash,

Rout

2024

J Mater Sci: Mater Electron

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DC 4-Point Measurement for Total Electrical Conductivity of SOFC Cathode Material

Cited by 9 publications

References 19 publications

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

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

Conductivity and Transference Number Determination Protocols for Solid Oxide Cell Materials

Investigation of structural, electrical and electrochemical properties of La0.8Sr0.2Mn1−xScxO3−δ as cathode on yttria-stabilized zirconia electrolyte for intermediate temperature solid oxide fuel cell fabricated by one step dry pressing method

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