scholarly journals Modelling the leakage current in a solid oxide fuel cell with bi-layer electrolyte

2020 ◽  
Author(s):  
Balaji Krishnamurthy ◽  
Hariharan Ramasubramanian
Keyword(s):  
Experimental Data ◽  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Leakage Current ◽  
Operating Temperature ◽  
Cell Voltage ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Operating Cell ◽  
Interfacial Oxygen

<p class="PaperAbstract">A mathematical model is developed to study the leakage current in a solid oxide fuel cell (SOFC) with a bi-layer electrolyte. The model predicts the variation of leakage current and power density with various design and operating factors of SOFC, namely thickness of the bi-layer electrolyte, operating temperature and operating cell voltage. The interfacial oxygen pressure in SOFC is also studied as a function of the thickness of YSZ layer. Modelling results are compared with experimental data and found to compare well.</p>

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.

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.

Application of an Anode Model to Investigate Physical Parameters in an Internal Reforming Solid-Oxide Fuel Cell

2005 ◽  
Vol 2 (2) ◽  
pp. 136-140 ◽  
Author(s):  
Eric S. Greene ◽  
Maria G. Medeiros ◽  
Wilson K. S. Chiu
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Structural Parameters ◽  
Porous Electrode ◽  
Cell Voltage ◽  
Solid Oxide ◽  
Physical Parameters ◽  
Oxide Fuel ◽  
Internal Reforming ◽  
Porous Anode

A one-dimensional model of chemical and mass transport phenomena in the porous anode of a solid-oxide fuel cell, in which there is internal reforming of methane, is presented. Macroscopically averaged porous electrode theory is used to model the mass transfer that occurs in the anode. Linear kinetics at a constant temperature are used to model the reforming and shift reactions. Correlations based on the Damkohler number are created to relate anode structural parameters and thickness to a nondimensional electrochemical conversion rate and cell voltage. It is shown how these can be applied in order to assist the design of an anode.

scholarly journals A Multiscale Approach to the Numerical Simulation of the Solid Oxide Fuel Cell

Catalysts ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 253 ◽  
Author(s):  
Marcin Mozdzierz ◽  
Katarzyna Berent ◽  
Shinji Kimijima ◽  
Janusz S. Szmyd ◽  
Grzegorz Brus
Keyword(s):  
Experimental Data ◽  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Multiscale Model ◽  
Solid Oxide ◽  
Correct Prediction ◽  
Multiscale Approach ◽  
Oxide Fuel

The models of solid oxide fuel cells (SOFCs), which are available in the open literature,may be categorized into two non-overlapping groups: microscale or macroscale. Recent progressin computational power makes it possible to formulate a model which combines both approaches,the so-called multiscale model. The novelty of this modeling approach lies in the combination ofthe microscale description of the transport phenomena and electrochemical reactions’ with thecomputational fluid dynamics model of the heat and mass transfer in an SOFC. In this work,the mathematical model of a solid oxide fuel cell which takes into account the averaged microstructureparameters of electrodes is developed and tested. To gain experimental data, which are used toconfirm the proposed model, the electrochemical tests and the direct observation of the microstructurewith the use of the focused ion beam combined with the scanning electron microscope technique(FIB-SEM) were conducted. The numerical results are compared with the experimental data fromthe short stack examination and a fair agreement is found, which shows that the proposed modelcan predict the cell behavior accurately. The mechanism of the power generation inside the SOFC isdiscussed and it is found that the current is produced primarily near the electrolyte–electrode interface.Simulations with an artificially changed microstructure does not lead to the correct prediction of thecell characteristics, which indicates that the microstructure is a crucial factor in the solid oxide fuelcell modeling.

scholarly journals Integrated Planar Solid Oxide Fuel Cell: Steady-State Model of a Bundle and Validation through Single Tube Experimental Data

Energies ◽  
2015 ◽  
Vol 8 (11) ◽  
pp. 13231-13254 ◽  
Author(s):  
Paola Costamagna ◽  
Simone Grosso ◽  
Rowland Travis ◽  
Loredana Magistri
Keyword(s):  
Experimental Data ◽  
Steady State ◽  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Solid Oxide ◽  
State Model ◽  
Oxide Fuel ◽  
Single Tube ◽  
Steady State Model

Effect of operating temperature on creep and damage in the bonded compliant seal of planar solid oxide fuel cell

2018 ◽  
Vol 43 (9) ◽  
pp. 4492-4504 ◽  
Author(s):  
Yu-Cai Zhang ◽  
Wenchun Jiang ◽  
Shan-Tung Tu ◽  
Chuan-Long Wang ◽  
Cheng Chen
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Operating Temperature ◽  
Solid Oxide ◽  
Oxide Fuel
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