Numerical Study on Electrochemical Performance of Low-Temperature Micro-Solid Oxide Fuel Cells with Submicron Platinum Electrodes

Park, Jee Min; Kim, Dae Yun; Baek, Jong Dae; Yoon, Young-Gui; Su, Pei-Chen; Lee, Seong Hyuk

doi:10.3390/en11051204

Cited by 8 publications

(6 citation statements)

References 25 publications

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“…Generally during solid oxide cells (SOC) operation, the electrode polarizations induce large voltage losses especially at the oxygen electrode compared to the fuel electrode, [12][13][14][15] therefore the modification in the existing material as well as investigation of new oxygen electrode materials are still required in order to enhance the oxygen electrode reaction kinetics. Moreover, the enhancement in oxygen electrode reaction kinetics will be further beneficial to increase the hydrogen production rate from water electrolysis using SOECs.…”

mentioning

confidence: 99%

High Performance LSC Infiltrated LSCF Oxygen Electrode for High Temperature Steam Electrolysis Application

Vibhu

Yildiz

Vinke

et al. 2019

J. Electrochem. Soc.

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This work is focused on La 0.6 Sr 0.4 CoO 3-δ (LSC) infiltrated La 0.58 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ (LSCF) oxygen electrode for high temperature steam electrolysis aimed at efficient hydrogen production. In this respect, first the chemical and structural stability of both LSCF and LSC materials are investigated as a function of temperature under air and oxygen. The electrochemical performance of LSC infiltrated LSCF oxygen electrode is then investigated for steam electrolysis and compared with conventional LSCF electrode. The symmetrical half-cell as well as single cell containing LSCF oxygen electrode with and without LSC infiltration are characterized using electrochemical impedance spectroscopy in the temperature range 700-900 • C. It is observed that the symmetrical cell as well as single cells with LSC infiltrated LSCF electrode performs better than the conventional LSCF electrode. The degradation experiments were performed with the symmetrical cells under polarizations. Post-test analysis using SEM-EDX was performed to investigate the changes of electrode and electrode/electrolyte interface microstructures.

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mentioning

confidence: 99%

High Performance LSC Infiltrated LSCF Oxygen Electrode for High Temperature Steam Electrolysis Application

Vibhu

Yildiz

Vinke

et al. 2019

J. Electrochem. Soc.

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“…One of the most promising approaches to the reduction of ohmic resistance is the application of electrolyte thin films having a thickness of about 10-30 µm [6][7][8]. Due to technological issues involved in the manufacture of such thin films, their formation should be carried out on a porous supporting substrate (cathode [9][10][11], anode [12][13][14], metal interconnector [15][16][17]) in order to ensure the mechanical strength of the cell.…”

Section: Introductionmentioning

confidence: 99%

Application of Promising Electrode Materials in Contact with a Thin-Layer ZrO2-Based Supporting Electrolyte for Solid Oxide Fuel Cells

et al. 2020

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The paper presents the results of an investigation into thin single- and triple-layer ZrO2-Sc2O3-based electrolytes prepared using the tape-casting technique in combination with promising electrodes based on La2NiO4+δ and Ni-Ce0.8Sm0.2O2-δ materials. It is shown that pressing and joint sintering of single electrolyte layers allows multilayer structures to be obtained that are free of defects at the layer interface. Electrical conductivity measurements of a triple-layer electrolyte carried out in longitudinal and transverse directions with both direct and alternating current showed resistance of the interface between the layers on the total resistance of the electrolyte to be minimal. Long-term tests have shown that the greatest degradation in resistance over time occurs in the case of an electrolyte with a tetragonal structure. Symmetrical electrochemical cells with electrodes fabricated using a screen-printing method were examined by means of electrochemical impedance spectroscopy. The polarization resistance of the electrodes was 0.45 and 0.16 Ohm∙cm2 at 800 °C for the fuel and oxygen electrodes, respectively. The distribution of relaxation times method was applied for impedance data analysis. During tests of a single solid oxide fuel cell comprising a supporting triple-layer electrolyte having a thickness of 300 microns, a power density of about 160 mW/cm2 at 850 °C was obtained using wet hydrogen as fuel and air as an oxidizing gas.

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“…We used the results from the experimental literature [10,11]. Unlike SOFC(Solid Oxide Fuel Cell; SOFC) [12] and PEMFC(Polymer Electrolyte Membrane Fuel Cells; PEMFC) [13], MCFCs showed very complicated reduction and oxidation reactions, therefore it is difficult to apply reaction-based equations [11]. When fuel gases, such as H 2 , H 2 O, and CO 2 are supplied to the anode, a reduction reaction occurs between the hydrogen and carbonate that emits electrons.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cell Size on the Performance and Temperature Distribution of Molten Carbonate Fuel Cells

Lee

2020

Energies

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Molten carbonate fuel cells (MCFCs) are high-operating-temperature fuel cells with high efficiency and fuel diversity. Electrochemical reactions in MCFCs are exothermic. As the size of the fuel cells increases, the amount of the heat from the fuel cells and the temperature of the fuel cells increase. In this work, we investigated the relationship between the fuel cell stack size and performance by applying computational fluid dynamics (CFD). Three flow types, namely co-flow, cross-flow, and counter-flow, were studied. We found that when the size of the fuel cells increased beyond a certain value, the size of the fuel cell no longer affected the cell performance. The maximum fuel cell temperature converged as the size of the fuel cell increased. The temperature and current density distribution with respect to the size showed a very similar distribution. The converged maximum temperature of the fuel cells depended on the gas flow condition. The maximum temperature of the fuel cell decreased as the amount of gas in the cathode size increased.

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Numerical Study on Electrochemical Performance of Low-Temperature Micro-Solid Oxide Fuel Cells with Submicron Platinum Electrodes

Cited by 8 publications

References 25 publications

High Performance LSC Infiltrated LSCF Oxygen Electrode for High Temperature Steam Electrolysis Application

High Performance LSC Infiltrated LSCF Oxygen Electrode for High Temperature Steam Electrolysis Application

Application of Promising Electrode Materials in Contact with a Thin-Layer ZrO2-Based Supporting Electrolyte for Solid Oxide Fuel Cells

Effect of Cell Size on the Performance and Temperature Distribution of Molten Carbonate Fuel Cells

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