Robust and fast estimation of equivalent circuit model from noisy electrochemical impedance spectra

Li, Hangyue; Lyu, Zewei; Han, Minfang

doi:10.1016/j.electacta.2022.140474

Cited by 38 publications

(8 citation statements)

References 38 publications

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“…The microstructures were characterized by scanning electron microscopy (SEM, JEOL JSM-7800F PRIME, 10 kV) equipped with energy-dispersive X-ray spectroscopy. Distribution of relaxation time analysis for EIS data was performed using EISART demonstrated in Python …”

Section: Methodsmentioning

confidence: 99%

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High-Performance (Ce, Zr)O₂-Free Solid Oxide Fuel Cell with an Active-Sintered Cathode Interface and a Low-Temperature Densified Micron-Scale Barrier Layer

Lyu,

Zhu,

et al. 2023

ACS Appl. Mater. Interfaces

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Incorporating a dense GDC (Gd 0.1 Ce 0.9 O 1.95 ) barrier layer is an effective strategy to avoid harmful reactions between the LSCF (La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3−δ ) cathode and the YSZ (yttria-stabilized zirconia) electrolyte. In this study, a micron-scale and dense GDC barrier layer is obtained by the combination of spin coating, lowtemperature sintering, and hydrothermal-assisted densification. The cell exhibits decent output performance, with a peak power density of 1.07 W/cm 2 at 780 °C. The ohmic and polarization resistances are significantly decreased by ∼44 and ∼36% than the cell with the screen-printed GDC barrier layer, respectively. Due to the low sintering temperature of the GDC barrier layer at 1200 °C, there is nearly no generation of (Ce, Zr)O 2 at the interface of GDC/YSZ. The thin and dense GDC barrier layer effectively shortens the oxygen-ion conduction pathway, as well as hinders Sr migration from the cathode, highlighting its remarkable potential for industrial applications.

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Section: Methodsmentioning

confidence: 99%

“…Distribution of relaxation time analysis for EIS data was performed using EISART demonstrated in Python. 29…”

Section: Characterizationsmentioning

confidence: 99%

High-Performance (Ce, Zr)O₂-Free Solid Oxide Fuel Cell with an Active-Sintered Cathode Interface and a Low-Temperature Densified Micron-Scale Barrier Layer

Lyu,

Zhu,

et al. 2023

ACS Appl. Mater. Interfaces

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“…A self-developed software of EISART was employed to interpret the EIS results into distribution of relaxation times (DRT) results. The algorithm of DRT can be found elsewhere (17)(18).…”

Section: Electrochemical Characteristicsmentioning

confidence: 99%

A Comparative Study of the Performance and Electrode Processes of Solid Oxide H₂O Electrolysis and CO₂ Electrolysis

Liang¹,

Han²,

Ni³

2023

ECS Trans.

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Solid oxide CO2 electrolysis was less studied compared with H2O electrolysis and the relevant reaction mechanism and electrode processes were poorly understood. This paper investigated the performance and electrode processes differences between CO2 electrolysis and H2O electrolysis. The shape of j-V curves, electrochemical impedance spectroscopy data and calculated distribution relaxation time results were analyzed. It was found that the performance of CO2 electrolysis degraded the most compared with that in SOFC mode and for H2O electrolysis after a 65 h’ operation. Meanwhile, j-V curve of CO2 electrolysis changed a lot and finally showed a convex total resistance pattern with applied current. It was also found that the characteristic frequency of charge transfer reaction and diffusion process for CO2 electrolysis was much lower than that of H2O electrolysis. A thermal activated peak at 10-100 Hz which was not noted for H2O electrolysis was considered to be CO2 adsorption and dissociation process in fuel electrode. Besides, diffusion process for H2O-H2 and CO2-CO mixture also differed. Finally, it was indicated that the different performance degradation may be due to different suppressed degree of charge transfer reaction in fuel electrode for H2O electrolysis and CO2 electrolysis and additional suppressed adsorption or dissociation process of CO2 for CO2 electrolysis.

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“…As Figure 4 shows, there was a direct correlation between the initial performances of the SOFCs and the polarization resistance under the on-load condition that the initial performances can be improved with the increasing hydrogen concentration during the reduction of the NiO-8YSZ anode when the hydrogen concentration was low (5% H2 + 95% N2, 15% H2 + 85% N2, 30% H2 + 70% N2) and then the initial performances remained constant basically with the continuing increasing hydrogen concentration during the reduction. The analyses of the distributions of relaxation time for the button-sized SOFCs with the NiO-8YSZ anodes reduced by the hydrogen of different concentration are shown in Figure 5, and physical significances of peaks in the distributions of relaxation time are listed in Table (7,8). Under the on-load condition, with the increasing hydrogen concentration during the reduction of the NiO-8YSZ anode, R1 and R4 showed decreasing trends while R2 showed increasing trend, and the variations of R3 and R5 were irregular.…”

Section: Analysis Of the Initial Performances Of The Button-sized Sofcsmentioning

confidence: 99%

The Reduction Step and Mechanism Analysis of the NiO-8YSZ Anode Affected by the Hydrogen Concentration

Wang¹,

Zhang²,

Song³

et al. 2023

ECS Trans.

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Hydrogen of different concentrations humidified by the water vapour were used to reduce the NiO-8YSZ anodes of the solid oxide fuel cells (SOFCs) at 700℃ and 720℃. The experimental results suggested that four periods of the open circuit voltage, namely rapid increase period, temporary stasis period, slow increase period and final stable period exist successively during the reduction, the characteristics of which were closely related to the hydrogen concentration of the reduction. After the reduction, the polarization resistance on open circuit and on load showed different correlation with the hydrogen concentration of the reduction. The variation trend of the initial performances of the SOFCs corresponded highly to the polarization resistance on load. The shrinking core model of the reduction of the NiO suggested that the further reduction of the unreacted NiO core would most likely cause the activation of the SOFC.

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Robust and fast estimation of equivalent circuit model from noisy electrochemical impedance spectra

Cited by 38 publications

References 38 publications

High-Performance (Ce, Zr)O₂-Free Solid Oxide Fuel Cell with an Active-Sintered Cathode Interface and a Low-Temperature Densified Micron-Scale Barrier Layer

High-Performance (Ce, Zr)O₂-Free Solid Oxide Fuel Cell with an Active-Sintered Cathode Interface and a Low-Temperature Densified Micron-Scale Barrier Layer

A Comparative Study of the Performance and Electrode Processes of Solid Oxide H₂O Electrolysis and CO₂ Electrolysis

The Reduction Step and Mechanism Analysis of the NiO-8YSZ Anode Affected by the Hydrogen Concentration

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Robust and fast estimation of equivalent circuit model from noisy electrochemical impedance spectra

Cited by 38 publications

References 38 publications

High-Performance (Ce, Zr)O2-Free Solid Oxide Fuel Cell with an Active-Sintered Cathode Interface and a Low-Temperature Densified Micron-Scale Barrier Layer

High-Performance (Ce, Zr)O2-Free Solid Oxide Fuel Cell with an Active-Sintered Cathode Interface and a Low-Temperature Densified Micron-Scale Barrier Layer

A Comparative Study of the Performance and Electrode Processes of Solid Oxide H2O Electrolysis and CO2 Electrolysis

The Reduction Step and Mechanism Analysis of the NiO-8YSZ Anode Affected by the Hydrogen Concentration

Contact Info

Product

Resources

About

High-Performance (Ce, Zr)O₂-Free Solid Oxide Fuel Cell with an Active-Sintered Cathode Interface and a Low-Temperature Densified Micron-Scale Barrier Layer

High-Performance (Ce, Zr)O₂-Free Solid Oxide Fuel Cell with an Active-Sintered Cathode Interface and a Low-Temperature Densified Micron-Scale Barrier Layer

A Comparative Study of the Performance and Electrode Processes of Solid Oxide H₂O Electrolysis and CO₂ Electrolysis