Electrochemical characteristics and performance of anode-supported SOFCs fabricated using carbon microspheres as a pore-former

Horri, Bahman Amini; Selomulya, Cordelia; Wang, Huanting

doi:10.1016/j.ijhydene.2012.10.005

Cited by 26 publications

(10 citation statements)

References 45 publications

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“…Depending on the operating temperature range, SOFC are classified into low, intermediate, and high temperature categories. The conventional SOFCs operating at 1000°C are mainly fabricated using yttria-stabilized zirconia (YSZ) as the electrolyte material [3,4]. The operation of SOFCs at such high temperatures is susceptible to a number of drawbacks such as higher costs, lower flexibility in the fabrication of electrodes, more thermal degradation, and more crack formation due to the larger thermal stress of the cell components [1,[5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Ionic–gelation synthesis of gadolinium doped ceria (Ce 0.8 Gd 0.2 O 1.90 ) nanocomposite powder using sodium-alginate

Pezeshkpour

Abdullah

Salamatinia

et al. 2017

Ceramics International

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Section: Introductionmentioning

confidence: 99%

Ionic–gelation synthesis of gadolinium doped ceria (Ce 0.8 Gd 0.2 O 1.90 ) nanocomposite powder using sodium-alginate

Pezeshkpour

Abdullah

Salamatinia

et al. 2017

Ceramics International

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“…The values of the temperature‐dependent ionic conductivity (

{\sigma T}

) and activation energy (

{{E}_{a}}

) were estimated using the y‐intercept and the slope of the linearised form of Equation (4), respectively. The experimental conductivity data for each sample showed excellent goodness of fit, matching the linearised form of the temperature‐dependent Arrhenius Equation [35]

\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr \sigma T={\sigma }_{0}Exp\left(-{{{E}_{a}}\over{KT}}\right)\hfill\cr}}

…”

Section: Resultsmentioning

confidence: 76%

Synthesis and Densification of Mo/Mg Co‐Doped Apatite‐type Lanthanum Silicate Electrolytes with Enhanced Ionic Conductivity

Cai

Horri

2023

Chemistry A European J

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Apatite-type lanthanum silicate (LSO) electrolyte is one of the most promising candidates for developing intermediate-temperature solid oxide electrolysis cells and solid oxide full cells (IT-SOECs and SOFCs) due to its stability and low activation energy. However, the LSO electrolyte still suffers from unsatisfied ionic conductivity and low relative density. Herein, a new co-doped method is reported to prepare highly purified polycrystalline powders of MgÀ Mo codoped LSO (Mg/Mo-LSO) electrolytes with high excellent densification properties and improved ionic conductivity. Introducing the Mo 6 + and Mg 2 + ions into the LSO structure can increase the number of interstitial oxide ions and improve the degree of densification at lower sintering temperatures, more importantly, expand the migration channel of oxide ions to enhance the ionic conductivity. As a result, the relative density of the fabricated Mo/Mg-LSO electrolytes pellets could achieve more than 98 % of the theoretical density after sintering at 1500 °C for 4 h with a grain size of about 1-3 μm and the EIS results showed the ionic conductivity increased from 0.782 mS • cm À 1 for the pristine LSO to 33.94 mS • cm À 1 for the doped sample La 9.5 Si 5.45 Mg 0.3 Mo 0.25 O 26 + δ at 800 °C. In addition, the effect of different Mo 6 + doping contents was investigated systematically, in which La 9.5 Si 5.45 Mg 0.3 Mo 0.25 O 26 + δ possessed the highest ionic conductivity and relative density. The proposed Mo/Mg co-doped method in this work is one step forward in developing apatite-structured electrolytes offering excellent potential to address the common issues associated with the fabrication of dense, highly conductive, and thermochemically stable electrolytes for solid oxide electrolysers and fuel cells.

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“…The area-specific resistance (ASR) of the cell individual layers is usually used to compare the impedance of different types of materials used in the individual parts of a SOFC. The ASR is defined as [93][94][95]:…”

Section: Sofc Fabrication and Geometriesmentioning

confidence: 99%

“…where R p is the polarization resistance (Ω) of a cell individual part, A is its effective area (m 2 ), l is the thickness (m), and ρ is the specific resistance of the material (Ω•m) [92,95].…”

Section: Sofc Fabrication and Geometriesmentioning

confidence: 99%

Progress in Material Development for Low-Temperature Solid Oxide Fuel Cells: A Review

Vostakola

Horri

2021

Energies

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Solid oxide fuel cells (SOFCs) have been considered as promising candidates to tackle the need for sustainable and efficient energy conversion devices. However, the current operating temperature of SOFCs poses critical challenges relating to the costs of fabrication and materials selection. To overcome these issues, many attempts have been made by the SOFC research and manufacturing communities for lowering the operating temperature to intermediate ranges (600–800 °C) and even lower temperatures (below 600 °C). Despite the interesting success and technical advantages obtained with the low-temperature SOFC, on the other hand, the cell operation at low temperature could noticeably increase the electrolyte ohmic loss and the polarization losses of the electrode that cause a decrease in the overall cell performance and energy conversion efficiency. In addition, the electrolyte ionic conductivity exponentially decreases with a decrease in operating temperature based on the Arrhenius conduction equation for semiconductors. To address these challenges, a variety of materials and fabrication methods have been developed in the past few years which are the subject of this critical review. Therefore, this paper focuses on the recent advances in the development of new low-temperature SOFCs materials, especially low-temperature electrolytes and electrodes with improved electrochemical properties, as well as summarizing the matching current collectors and sealants for the low-temperature region. Different strategies for improving the cell efficiency, the impact of operating variables on the performance of SOFCs, and the available choice of stack designs, as well as the costing factors, operational limits, and performance prospects, have been briefly summarized in this work.

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Electrochemical characteristics and performance of anode-supported SOFCs fabricated using carbon microspheres as a pore-former

Cited by 26 publications

References 45 publications

Ionic–gelation synthesis of gadolinium doped ceria (Ce 0.8 Gd 0.2 O 1.90 ) nanocomposite powder using sodium-alginate

Ionic–gelation synthesis of gadolinium doped ceria (Ce 0.8 Gd 0.2 O 1.90 ) nanocomposite powder using sodium-alginate

Synthesis and Densification of Mo/Mg Co‐Doped Apatite‐type Lanthanum Silicate Electrolytes with Enhanced Ionic Conductivity

Progress in Material Development for Low-Temperature Solid Oxide Fuel Cells: A Review

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