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

2021 ◽  
Vol 11 (11) ◽  
pp. 4963
Author(s):  
Kanghee Jo ◽  
Jooyeon Ha ◽  
Jiseung Ryu ◽  
Eunkyung Lee ◽  
Heesoo Lee
Keyword(s):  
Electrical Conductivity ◽  
Solid Oxide Fuel Cells ◽  
Cathode Material ◽  
Geometrical Parameters ◽  
Lead Wire ◽  
Specimen Thickness ◽  
Electrochemical Cells ◽  
Sofc Cathode ◽  
Research Teams ◽  
Total Electrical Conductivity

Conductive oxides are widely studied as cathode materials for electrochemical cells, such as solid oxide fuel cells (SOFCs), because of their chemical stability and high electrical conductivity at high temperatures (800–950 °C). The cathode is a key component of SOFCs, accounting for the greatest resistance loss among the SOFC components. It is important to precisely determine the conductivity of the cathode material, but it is difficult to achieve consistency among measurements because of errors caused by differences in the measurement methods and conditions employed by various research teams. In this study, the total electrical conductivity of an SOFC cathode material was measured by the DC 4-point method by investigating the geometrical parameters of the sample and the measurement terminal and the measurement device using La0.8Sr0.2MnO3+d (LSM). The measurement variables included the spacing between the measurement terminals (1 and 2 cm), lead wire diameter (0.25 and 0.5 mm), specimen thickness (3, 4, and 5 mm), and the applied current (10, 50, and 100 mA). The larger the spacing between the measurement terminal and the thinner the specimen, the smaller the standard deviation.

Bismuth-doped La1.75Sr0.25NiO4+δ as a novel cathode material for solid oxide fuel cells

2017 ◽  
Vol 5 (27) ◽  
pp. 14012-14019 ◽  
Author(s):  
Zhesheng Zhu ◽  
Mei Li ◽  
Changrong Xia ◽  
Henny J. M. Bouwmeester
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Cathode Material ◽  
Oxygen Transport ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Sofc Cathode ◽  
Electronic Conductor ◽  
Mixed Ionic Electronic Conductor ◽  
A Site

A-site substitution with bismuth promotes oxygen transport in the layered mixed ionic–electronic conductor La1.75Sr0.25NiO4+δ, improving its performance as an IT-SOFC cathode.

Copper cobalt spinel as a high performance cathode for intermediate temperature solid oxide fuel cells

2016 ◽  
Vol 52 (55) ◽  
pp. 8615-8618 ◽  
Author(s):  
Lin Shao ◽  
Qi Wang ◽  
Lishuang Fan ◽  
Pengxiang Wang ◽  
Naiqing Zhang ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Citric Acid ◽  
Solid Oxide Fuel Cells ◽  
Cathode Material ◽  
High Performance ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Sofc Cathode ◽  
Cobalt Spinel ◽  
Acid Process

CuCo2O4 spinel prepared via an EDTA–citric acid process was studied as a candidate solid oxide fuel cell (SOFC) cathode material at intermediate temperatures (IT).

Characteristics of YCoO3-type perovskite oxide and application as an SOFC cathode

2021 ◽  
Vol 9 (6) ◽  
pp. 3584-3588
Author(s):  
Takaaki Sakai ◽  
Masako Ogushi ◽  
Kohei Hosoi ◽  
Atsushi Inoishi ◽  
Hidehisa Hagiwara ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Cathode Material ◽  
Solid Oxide ◽  
Perovskite Oxide ◽  
Oxide Fuel ◽  
Sofc Cathode

YCoO3 is discussed as a novel cathode material for solid oxide fuel cells (SOFCs).

Electrical Conductivity of NiO-Gadolinia Doped Ceria Anode Material for Intermediate Temperature Solid Oxide Fuel Cells

2017 ◽  
Vol 17 ◽  
pp. 224-236 ◽  
Author(s):  
Ajith Kumar Soman ◽  
P. Kuppusami ◽  
Arul Maximus Rabel
Keyword(s):  
Electrical Conductivity ◽  
Solid Oxide Fuel Cells ◽  
Anode Material ◽  
Solid State Reaction Method ◽  
Doped Ceria ◽  
X Ray Diffraction ◽  
Ac Impedance Spectroscopy ◽  
Conventional Solid State Reaction ◽  
X Ray ◽  
Total Electrical Conductivity

In this paper, NiO-Gadolinia Doped Ceria (10 mole % Gadolinia) NiO-GDC10 composite with Nickel varying from 50 to 65 wt.% has been prepared by conventional solid state reaction method. The structural and microstructural properties have been evaluated by X-ray diffraction and scanning electron microscopy, respectively. The electrochemical behavior of the composites with varying concentration of Ni has been investigated by AC impedance spectroscopy. Both the grain and grain boundary conductivities have been determined as a function of temperature in the range of 773-973 K. The highest total electrical conductivity (σGi+σGb) have been achieved as 0.28 x10-3 Scm-1 at 973 K with activation energy of 0.40 eV for composition of GDC10 with 65 wt % of NiO (NiO-GDC-65:35 wt.%). The influence of microstructure on electrical properties of the composites has been analyzed and the conductivities have been compared with the conventional NiO-YSZ (50:50) composite in order to fabricate Ni-GDC based anode material of better performance.

Computational and experimental analysis of Ba0.95La0.05FeO3−δ as a cathode material for solid oxide fuel cells

2014 ◽  
Vol 2 (34) ◽  
pp. 14154-14163 ◽  
Author(s):  
Chi Chen ◽  
Dengjie Chen ◽  
Yang Gao ◽  
Zongping Shao ◽  
Francesco Ciucci
Keyword(s):  
Thin Films ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Cathode Material ◽  
Single Crystal ◽  
Experimental Analysis ◽  
Molecular Simulations ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Sofc Cathode

La slightly-doped BaFeO3 as a SOFC cathode material is studied by experiments with single crystal thin films and molecular simulations.

Effect of Sr Doped La4Ni3O10±δ as a Cathode for IT-SOFC

2014 ◽  
Vol 931-932 ◽  
pp. 116-121 ◽  
Author(s):  
Siriwan Chokkha ◽  
Sutin Kuharuangrong
Keyword(s):  
Electrical Conductivity ◽  
Cathode Material ◽  
Room Temperature ◽  
Single Phase ◽  
Intermediate Temperature ◽  
Orthorhombic Structure ◽  
Sofc Cathode ◽  
Gel Method ◽  
A Value ◽  
Structure Changes

The effect of Sr doped La4-xSrxNi3O10±δ (x = 0, 0.05, 0.1, 0.2 and 0.3) has been investigated as an intermediate temperature SOFC cathode material. The Ruddlesden-Popper (RP) compositions of n = 3 were successfully synthesized via citrate gel method. The single phase of sintered La4-xSrxNi3O10±δ (x = 0, 0.05, 0.1 and 0.2) powders was confirmed as an orthorhombic structure. However, this structure changes to more symmetry with an increasing amount of Sr dopant. With x = 0.3, the phases of La1.7Sr0.3NiO4 as n = 1 RP and NiO appear without n = 3 RP. La3.95Sr0.05Ni3O10±δ shows the highest electrical conductivity with a value of 140 S/cm at room temperature. Nevertheless, the electrical conductivity of La4-xSrxNi3O10±δ decreases and further decreases with increasing amount of Sr. The conductivity values at 200°C of La4-xSrxNi3O10±δ (x =0, 0.05 and 0.1) are 89, 113 and 101 S/cm, respectively. For x = 0.3, the conductivity decreases lower than x 0.1 with its value of 36 S/cm because of the low conductivity phase of n = 1 RP.

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