Current developments in reversible solid oxide fuel cells

Gómez, Sergio Y.; Hotza, Dachamir

doi:10.1016/j.rser.2016.03.005

Cited by 314 publications

(159 citation statements)

References 259 publications

Supporting

Mentioning

138

Contrasting

Unclassified

Order By: Relevance

“…6,7 Besides, fuel cell technologies provide high efficiency, sustainability, and environment friendly. 19,20 SOFCs emerge as alternative power generation system, which raise the world's attention because of the advantages of this system among other fuel cell types including the most efficient for chemical energy conversion of fuel directly into electrical power (>70% with fuel regeneration), 21 flexibilities of various consumption (hydrogen, natural gas, hydrocarbons and syngas), 22,23 superior tolerance to impurities in the fuel which unnecessary pure fuel consumption (lead to less costly and highly available) 24 , and produce a high energy range for huge stationary power plants with >100 MW. 10,11 Conventionally, fuel cells are divided to lower temperature fuel cells (<250°C ) 12 such as polymer electrolyte membrane fuel cell (PEMFC), 13 direct alcohol fuel cell, 14 and hightemperature fuel cells (400-1000°C) 15 such as molten carbonate fuel cell 16 and solid oxide fuel cell.…”

Section: Introductionmentioning

confidence: 99%

A review on recent status and challenges of yttria stabilized zirconia modification to lowering the temperature of solid oxide fuel cells operation

et al. 2019

View full text Add to dashboard Cite

Solid Oxide Fuel Cells (SOFCs) are an electrochemical energy converter that receives the world's attention as a power generation system of the future owing to its flexibility to consume various types of fuels, low emission of greenhouses gases, and having high efficiency reaching over 70%. A conventional SOFCs operates at high temperature, typically ranges between 800 to 1000°C. SOFCs use yttria-stabilized zirconia (YSZ) as the electrolyte, which exhibits excellent oxide ion conductivity in this temperature range. However, this temperature range poses an issue to SOFCs durability, as it leads to the degradation of the cell components. In addition, SOFCs application is limited and difficult to implement for the transportation sector and portable appliance. A viable solution is to lower the SOFCs operating temperature to intermediate (600 to 800°C ) or low (<600°C) operating temperature. The benefit of this way, cell durability will improve, as well as other advantages such as facilitates handling, assembling, dismantling, cost reduction, and expanded the SOFCs application. Nonetheless, the key challenge for the issue is finding suitable electrolyte, as YSZ have lower ionic conductivity at low and intermediate temperature range. The aim of this paper is to review the status and challenges in the attempts made to modify YSZ electrolyte within the past decade. The resulting ionic conductivity, microstructure, and densification, mechanical and thermal properties of these 'new' electrolytes critically reviewed. The targeted conductivity of modification of YSZ electrolyte must be exceeded >0.1 S cm -1 to enable high performance of SOFCs power generation systems to be realized for transportation and portable applications. Based on our knowledge, this paper is the first review which focused on the recent status and challenges of YSZ electrolyte towards lowering the operating temperature.

show abstract

Section: Introductionmentioning

confidence: 99%

A review on recent status and challenges of yttria stabilized zirconia modification to lowering the temperature of solid oxide fuel cells operation

et al. 2019

View full text Add to dashboard Cite

show abstract

“…This increase in SOEC research can be monitored in various ways. One way can be via the number of publications on the topic e. (6). DTU Energy (formerly Risø National Laboratory) has been conducting research in the field of SOEC since 2003 from performance testing of button cells to long-term reversible operation of an SOEC stack.…”

Section: Introductionmentioning

confidence: 99%

A Decade of Solid Oxide Electrolysis Improvements at DTU Energy

et al. 2017

View full text Add to dashboard Cite

Solid oxide electrolysis cells (SOECs) can efficiently convert electrical energy (e.g. surplus wind power) to energy stored in fuels such as hydrogen or other synthetic fuels. Performance and durability of the SOEC has increased orders of magnitudes within the last decade. This paper presents a short review of the R&D work on SOEC single cells conducted at DTU Energy from 2005 to 2015. The SOEC improvements have involved increasing the of the oxygen electrode performance, elimination of impurities in the feed streams, optimization of processing routes, and fuel electrode structure optimization. All together, these improvements have led to a decrease in long-term degradation rate from 40 %/kh to 0.4 %/kh for steam electrolysis at -1 A/cm 2 , while the initial area specific resistance has been decreased from 0.44 cm 2 to 0.15 cm 2 at -0.5 A/cm 2 and 750 C.

show abstract

“…They have the potential to form a critical part of renewable energy infrastructure both in transportation and at a grid level [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Infiltration of commercially available, anode supported SOFC’s via inkjet printing

Mitchell-Williams

Tomov

Saadabadi

et al. 2017

Mater Renew Sustain Energy

View full text Add to dashboard Cite

Commercially available anode supported solid oxide fuel cells (NiO-8YSZ/8YSZ/LSCF-20 mm in diameter) were anode infiltrated with gadolinium doped ceria (CGO) using a scalable drop-on-demand inkjet printing process. Cells were infiltrated with two different precursor solutions-water based or propionic acid based. The saturation limit of the 0.5 lm thick anode supports sintered at 1400°C was found to be approximately 1wt%. No significant enhancement in power output was recorded at practical voltage levels. Microstructural characterisation was carried out after electrochemical performance testing using high resolution scanning electron microscopy. This work demonstrates that despite the feasibility of achieving CGO nanoparticle infiltration into thick, commercial SOFC anodes with a simple, low-cost and industrially scalable procedure other loss mechanisms were dominant. Infiltration of model symmetric anode cells with the propionic acid based ink demonstrated that significant reductions in polarisation resistance were possible.

show abstract

Current developments in reversible solid oxide fuel cells

Cited by 314 publications

References 259 publications

A review on recent status and challenges of yttria stabilized zirconia modification to lowering the temperature of solid oxide fuel cells operation

A review on recent status and challenges of yttria stabilized zirconia modification to lowering the temperature of solid oxide fuel cells operation

A Decade of Solid Oxide Electrolysis Improvements at DTU Energy

Infiltration of commercially available, anode supported SOFC’s via inkjet printing

Contact Info

Product

Resources

About