scholarly journals PEROVISKITAS LaSrNiO3 COMO CÁTODO PARA CÉLULAS A COMBUSTÍVEL DE ÓXIDO SÓLIDO (SOFC)

2017 ◽  
Vol 38 (1) ◽  
pp. 76
Author(s):  
Karla S. M. G. Sousa ◽  
A. N. C. S Oliveira
Keyword(s):  
Fuel Cell ◽  
Literature Review ◽  
Electrode Material ◽  
Electrochemical Cell ◽  
Operating Temperature ◽  
Solid Oxide ◽  
Cell Design ◽  
Electronic Conductor ◽  
Ceramic Electrolyte ◽  
Ceramic Manufacture

Due to high operating temperature of the fuel cell Solid Oxide (SOFC), only the noble metal or oxide electronic conductor can be used as the cathode material. The choice of electrode material depends on the target application, the specific ceramic electrolyte, the temperature range of desired operation, the electrochemical cell design and specific methods of ceramic manufacture. The aim of this paper is to present a literature review on the material used to compose a Fuel Cell Solid Oxide (SOFC) and operating it.

Behaviour of Various Glass Seal for Planar Solid Oxide Fuel Cell

2008 ◽  
Vol 55-57 ◽  
pp. 817-820 ◽  
Author(s):  
N. Punbusayakul ◽  
W. Wongklang ◽  
K. Wongtida ◽  
J. Charoensuk ◽  
S. Charojrochkul
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Operating Temperature ◽  
Compressive Force ◽  
Leakage Rate ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Ceramic Electrolyte ◽  
Long Term Stability ◽  
Critical Issues

One of the critical issues in designing a planar solid oxide fuel cell (SOFC) is the development of materials to hermetically seal the metal (430 series stainless steel) or ceramic interconnector with the ceramic electrolyte of the cell. The main objective of this sealing material is to achieve a low leak rate, long-term stability at operating temperature and chemical compatibility with other components. One of the compositions has been operated in an SOFC in excess of 30 minutes over the range of 600, 700, 800, and 900°C. The seal is a composition of polymer blend and glass of 1:3, 1:1 and 3:1 by weight. The leakage rate of each seal was measured simultaneously under the compressive force of 100 N, 2 bar Helium. The seal was characterized using a thermogravimetric analysis. The effect of glass composition on operating temperature and compressive forces on the leakage rate have been discussed and correlated.

Location of deuterium sites at operating temperature from neutron diffraction of BaIn0.6Ti0.2Yb0.2O2.6−n(OH)2n, an electrolyte for proton-solid oxide fuel cells

2016 ◽  
Vol 18 (23) ◽  
pp. 15751-15759 ◽  
Author(s):  
Angélique Jarry ◽  
Olivier Joubert ◽  
Emmanuelle Suard ◽  
Jean Marc Zanotti ◽  
Eric Quarez
Keyword(s):  
Fuel Cell ◽  
Neutron Diffraction ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide Fuel Cell ◽  
Operating Temperature ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Proton Diffusion ◽  
Hydration Mechanism ◽  
Fundamental Understanding

A fundamental understanding of the doping effect on the hydration mechanism and related proton diffusion pathways are keys to the progress of Proton-Solid Oxide Fuel Cell (H+-SOFC) technologies.

Development of Fabrication Processes for Tubular Solid Oxide Fuel Cell (SOFC) by Plasma Spraying

1998 ◽  
Author(s):  
W.T. Ju ◽  
S.H. Hong
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Plasma Spray ◽  
Cell Structure ◽  
Atmospheric Pressure Plasma ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Air Electrode ◽  
Ceramic Electrolyte ◽  
Ysz Electrolyte

Abstract The atmospheric pressure plasma spray processes for functional layers of the tubular solid oxide fuel cell are developed to build a fuel cell structure consisting of air electrode, ceramic electrolyte, and fuel electrode. Further more the characteristics of each film are also investigated. The layers of LSM (La0.65Sr0.35MnO3) air electrode and Ni/8YSZ fuel electrode have porosities of 23 ~32 % sufficient for supplying fuel and oxidant gases efficiently to electrochemical reaction interfaces. The measured electrical conductivities of the electrodes are higher than 90 S/cm at 1000 °C, which satisfy the requirement as the current collecting electrodes. The YSZ electrolyte film has a high ionic conductivity of 0.07 S/cm at 1000 °C, but shows a bit too porous to block the oxygen molecule penetration through it. A unit tubular SOFC is fabricated by the optimized plasma spray processes for depositing each functional film and forming a porous cylindrical supporting tube of the cell, and turns out to have a promising capability of electricity generation.

Doped Ceria Based Solid Oxide Fuel Cell Electrolytes and their Sintering Aspects: An Overview

2016 ◽  
Vol 835 ◽  
pp. 199-236 ◽  
Author(s):  
Pradyot Datta
Keyword(s):  
Power Generation ◽  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Operating Temperature ◽  
Solid Oxide ◽  
Ion Conductivity ◽  
Doped Ceria ◽  
Oxide Fuel ◽  
Oxygen Ion Conductivity ◽  
Oxygen Ion

Depletion of fossil fuel at an alarming rate is a major concern of humankind. Consequently, researchers all over the world are putting a concerted effort for finding alternative and renewable energy. Solid oxide fuel cell (SOFC) is one such system. SOFCs are electrochemical devices that have several advantages over conventional power generation systems like high efficiency of power generation, low emission of green house gases and the fuel flexibility. The major research focus of recent times is to reduce the operating temperature of SOFC in the range of 500 to 700 °C so as to render it commercially viable. This reduction in temperature is largely dependent on finding an electrolyte material with adequate oxygen ion conductivity at the intended operating temperature. One much material is Gadolinia doped Ceria (CGO) that shows very good oxygen ion conductivity at the intended operation temperature. The aim of this overview is to highlight the contribution that materials chemistry has made to the development of CGO as an electrolyte.

Lattice Expansion of BaCe0.54Zr0.36Y0.1O3-δ Ceramic Electrolyte

2020 ◽  
Vol 307 ◽  
pp. 149-153
Author(s):  
Nurul Waheeda Mazlan ◽  
Nafisah Osman ◽  
Oskar Hasdinor Hassan ◽  
Zakiah Mohamed
Keyword(s):  
Fuel Cell ◽  
Structural Analysis ◽  
Solid Oxide Fuel Cell ◽  
Room Temperature ◽  
Sol Gel ◽  
Xrd Analysis ◽  
Solid Oxide ◽  
Lattice Expansion ◽  
Oxide Fuel ◽  
Ceramic Electrolyte

Abstract. Solid oxide fuel cell (SOFC) is an electrochemical conversion device that undergoes a thermal cycling at various operating temperature where lead to the degradation of its mechanical properties. Electrolyte among the main component in SOFC plays a crucial part in defined the overall performance which facing a lattice expansion event when exposed to heating. Thus, in this paper BaCe0.54Zr0.36Y0.1O3-δ (BCZY) was selected as potential electrolyte for intermediate temperature solid oxide fuel cell (IT-SOFC) to investigate its lattice expansion as a function of temperature. The sample was prepared via a sol gel method and calcined at 1100°C for 10 hours to form a powder and then pressed to become a pellet. To ensure a good densification in such pellet, two-steps sintering processes was indicated at 1500°C and ground to a powder form prior to the lattice expansion measurements. High temperature X-ray diffraction (HT-XRD) was used to study the lattice expansion of sample in the temperature range of 25°C to 700°C with interval 100°C under air atmosphere. HT-XRD analysis was done using X’pert Highscore Plus software and Visual for Electronic and Structural Analysis (VESTA) software was used to observe the crystal structure. Phase and structural analysis of BCZY electrolyte materials were discussed. Apparently, the BCZY shows an average of 97% phase purity from room temperature to 700°C. Rietveld refinement analysis revealed that the BaCe0.54Zr0.36Y0.1O3-δ exhibits cubic symmetrical structure with unit cell, a=b=c that varied from 4.3440Å - 4.3731Å for all the temperature studied. Thus, the expansion percentage for the lattice expansion from room temperature to 700°C was about 12.6 %.

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