Electrochemical Impedance Analysis of SOFC Cathode Reaction Using Evolutionary Programming

Fuel Cells ◽  
2012 ◽  
Vol 12 (1) ◽  
pp. 77-85 ◽  
Author(s):  
S. Hershkovitz ◽  
S. Baltianski ◽  
Y. Tsur
Keyword(s):  
Electrochemical Impedance ◽  
Impedance Analysis ◽  
Evolutionary Programming ◽  
Sofc Cathode ◽  
Cathode Reaction

Characterizations of Synthetic 8mol% YSZ with Comparison to 3mol %YSZ for HT-SOFC

2020 ◽  
Vol 38 (4A) ◽  
pp. 491-500
Author(s):  
Abeer F. Al-Attar ◽  
Saad B. H. Farid ◽  
Fadhil A. Hashim
Keyword(s):  
Ionic Conductivity ◽  
Electrochemical Impedance ◽  
Structural Information ◽  
Impedance Analysis ◽  
High Energy ◽  
Yttria Stabilized Zirconia ◽  
X Ray Diffraction ◽  
Stabilized Zirconia ◽  
Powder Morphology ◽  
X Ray

In this work, Yttria (Y2O3) was successfully doped into tetragonal 3mol% yttria stabilized Zirconia (3YSZ) by high energy-mechanical milling to synthesize 8mol% yttria stabilized Zirconia (8YSZ) used as an electrolyte for high temperature solid oxide fuel cells (HT-SOFC). This work aims to evaluate the densification and ionic conductivity of the sintered electrolytes at 1650°C. The bulk density was measured according to ASTM C373-17. The powder morphology and the microstructure of the sintered electrolytes were analyzed via Field Emission Scanning Electron Microscopy (FESEM). The chemical analysis was obtained with Energy-dispersive X-ray spectroscopy (EDS). Also, X-ray diffraction (XRD) was used to obtain structural information of the starting materials and the sintered electrolytes. The ionic conductivity was obtained through electrochemical impedance spectroscopy (EIS) in the air as a function of temperatures at a frequency range of 100(mHz)-100(kHz). It is found that the 3YSZ has a higher density than the 8YSZ. The impedance analysis showed that the ionic conductivity of the prepared 8YSZ at 800°C is0.906 (S.cm) and it was 0.214(S.cm) of the 3YSZ. Besides, 8YSZ has a lower activation energy 0.774(eV) than that of the 3YSZ 0.901(eV). Thus, the prepared 8YSZ can be nominated as an electrolyte for the HT-SOFC.

Electrochemical Impedance Analysis of the Wear of Planographic Plates

CORROSION ◽  
1991 ◽  
Vol 47 (1) ◽  
pp. 67-73 ◽  
Author(s):  
M. W. Kendig ◽  
S. Breitweiser ◽  
E. Hudyma
Keyword(s):  
Electrochemical Impedance ◽  
Impedance Analysis

scholarly journals Potentiometric C2H4-Selective Detection on Solid-State Sensors Activated with Bifunctional Catalytic Nanoparticles

Chemosensors ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 274
Author(s):  
Fidel Toldra-Reig ◽  
Jose Manuel Serra
Keyword(s):  
Solid State ◽  
Electrochemical Impedance ◽  
Impedance Analysis ◽  
Selective Detection ◽  
Catalyst Nanoparticles ◽  
Cross Sensitivity ◽  
Car Exhaust ◽  
Catalytic Nanoparticles ◽  
Oxidation Properties ◽  
Insight Into

This work presents a solid-state ionic-based device to selectively detect C2H4 in car exhaust gases. The sensor consists of 8YSZ as the electrolyte and two electrodes: Fe0.7Cr1.3O3/8YSZ and LSM/8YSZ. The main aim of this work is to optimize the catalytic behavior of the working electrode to C2H4 and reduce cross-sensitivity toward CO and H2O. Several catalyst nanoparticles were infiltrated to tailor C2H4 adsorption and electrochemical oxidation properties while diminishing adsorption and conversion of other gas components such as CO. The infiltrated metal catalysts were selected, taking into account both adsorption and redox properties. Infiltration of Ti or Al, followed by a second infiltration of Ni, enabled the selective detection of C2H4 with low cross-sensitivity toward CO and H2O in a moist gas environment. Further insight into potentiometric C2H4 sensing is achieved by electrochemical impedance analysis of the electrodes activated with bifunctional catalysts.

Electrochemical impedance analysis of spray deposited CZTS thin film: Effect of Se introduction

2016 ◽  
Vol 58 ◽  
pp. 418-425 ◽  
Author(s):  
Swati J. Patil ◽  
Vaibhav C. Lokhande ◽  
Dong-Weon Lee ◽  
Chandrakant D. Lokhande
Keyword(s):  
Thin Film ◽  
Electrochemical Impedance ◽  
Impedance Analysis ◽  
Czts Thin Film

Electrochemical Impedance Analysis of Polyaniline Films on Electrodes

1987 ◽  
Vol 134 (12) ◽  
pp. 3078-3083 ◽  
Author(s):  
Israel Rubinstein ◽  
Eyal Sabatani ◽  
Judith Rishpon
Keyword(s):  
Electrochemical Impedance ◽  
Impedance Analysis ◽  
Polyaniline Films

Microstructure, Sinterability and Electrochemical Properties of a Sm-Sr-(Co,Fe,Ni)-O Cathode System for Solid Oxide Fuel Cells

2009 ◽  
Author(s):  
Seung-Wook Baek ◽  
Joongmyeon Bae
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Electrochemical Properties ◽  
Electrochemical Impedance ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Sofc Cathode ◽  
Low Thermal Expansion ◽  
Temperature Operating ◽  
The Relationship

Samarium (Sm) is a rare earth material that shows promise for use in cathodes of intermediate temperature-operating solid oxide fuel cells (IT-SOFCs). Perovskite-structured oxide containing Sm has very attractive electrocatalytic properties, and spinel-structured oxide generally exhibits low thermal expansion, indicating its suitability for application as a SOFC cathode. In this paper, the characteristics of the various Sm-based oxide materials (Sm-Sr-(Co,Fe,Ni)-O) deposited on Sm0.2Ce0.8O1.9 (SDC) electrolyte pellets were investigated in terms of their microstructure, sinterability and electrochemical properties. The relationship between the composition and the sintering temperature was studied and discussed. Results show that the substitution of iron (Fe) and nickel (Ni) in Co-sites affects the sinterability, adhesion to the electrolyte and electrochemical activity, such that the different sintering temperatures for these compositions should be considered. The microstructure and sinterability of the cathodes were investigated using a scanning electron microscope (SEM). Area specific resistance (ASR) values for all cathode compositions were measured using AC electrochemical impedance spectroscopy (EIS).

scholarly journals Electrochemical impedance analysis on solid electrolyte oxygen sensor with gas and liquid reference electrodes for liquid LBE

2017 ◽  
Vol 131 ◽  
pp. 420-427
Author(s):  
Pribadi Mumpuni Adhi ◽  
Nariaki Okubo ◽  
Atsushi Komatsu ◽  
Masatoshi Kondo ◽  
Minoru Takahashi
Keyword(s):  
Solid Electrolyte ◽  
Oxygen Sensor ◽  
Electrochemical Impedance ◽  
Impedance Analysis ◽  
Reference Electrodes
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