Calcium doped ceria-based materials for cost-effective intermediate temperature solid oxide fuel cells

Zhu, Bin; Liu, Xiangrong; Sun, Mao; Ji, Shijun; Sun, Juncai

doi:10.1016/s1293-2558(03)00123-7

Cited by 53 publications

(31 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…6, there is a clear transition at a temperature around 500°C for all compositions. This is somewhat different from what has been reported earlier [7,9]. The change in the value of activation energy (slope) clearly reflects the already discussed aspect Fig.…”

Section: Conductivitycontrasting

confidence: 89%

“…Zhu and coworkers [7] have reported the conductivity in air and in a fuel-cell environment, and though the values differ slightly, the trend in the log σ vs. 1,000/T for both sets in their work appear similar.…”

Section: Conductivitymentioning

confidence: 81%

“…However, since the nature of the plots appear similar for fuel-cell and air environment [7,9], it is likely that the mechanism of conduction in a fuel-cell environment and in air are similar. The log (σ) vs. 1,000/T plots for various concentration of carbonate is provided in Fig.…”

Section: Conductivitymentioning

confidence: 99%

“…These ceria-salt composites effectively suppress electronic conduction, lend mechanical strength, and enhance ITSOFC performance. These new composite materials offer important and interesting challenges in both fundamental as well as applied physics [7]. In conventional composite materials, the significant conductivity enhancement, called the composite effect, occurs usually for a system containing two solid-phase components, where one component has a moderate ionic conductivity while the other is nonconducting.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Role of the salt phase in GDC and alumina-based composites

Jain

Bobade

Gulwade

et al. 2010

Ionics

View full text Add to dashboard Cite

In ceria-salt composite systems, the reasons for a two-order enhancement in conductivity relative to that for doped ceria are still unclear. In our attempt to gain further insight in the phenomenon of conduction, we have investigated two different sets of composites: alumina-salt and ceria-salt. Various compositions in the two-phase composite system involving gadolinium-doped ceria (GDC) and alkali carbonates were prepared and characterized. Later, GDC was replaced with alumina, and similar compositions were prepared and characterized to examine the contribution of the GDC phase to the overall conductivity. The conductivity curves, in spite of variations in composition, exhibited a transition at about 500°C, which also corresponds to the melting temperature of the salt phase. From an analysis of the conductivity data, it is observed that at high temperatures, the salt phase plays a significant role in the conduction enhancement. However, at lower temperatures, GDC primarily appears to contribute significantly to the conductivity.

show abstract

Section: Conductivitycontrasting

confidence: 89%

Section: Conductivitymentioning

confidence: 81%

Section: Conductivitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Role of the salt phase in GDC and alumina-based composites

Jain

Bobade

Gulwade

et al. 2010

Ionics

View full text Add to dashboard Cite

show abstract

“…Also, ultra-thin layer of YSZ has been used as an electronic barrier in bilayer thin films to block the electronic conduction [131][132][133]. In addition to gadolinia and samaria, dopants like yttria, calcia, and strontia have been investigated and used in ceria-based systems [134][135][136][137][138]. Co-doping was also used to further enhance the ionic conductivity of ceria-based systems [139][140][141][142][143][144][145][146][147][148][149][150].…”

Section: Scandia-stabilized Zirconiamentioning

confidence: 99%

State-of-the-Art Thin Film Electrolytes for Solid Oxide Fuel Cells

Nandasiri

Thevuthasan

2015

Thin Film Structures in Energy Applications

View full text Add to dashboard Cite

State-of-the-art solid oxide fuel cells (SOFC) are among the main candidates for clean energy technology due to their high efficiency, fuel flexibility, low air pollution, and minimal greenhouse gas emission. However, high operational temperature of SOFC is a greater challenge in commercialization of these devices for low cost and portable applications. High temperature operation of SOFC degrades its performance with aging, limits the selection of materials for fuel cell components, and increases the fabrication cost. Thus, there have been enormous efforts to improve the properties of existing materials and develop new materials for SOFC components in order to lower the operating temperature of SOFC. Recent advances in thin film technology have also been utilized to develop new materials with improved properties for SOFC. One of the key components in SOFC is the electrolyte and several research groups are working on developing new electrolyte materials. In this chapter, we will discuss the recent advances in thin film SOFC electrolytes. This extensive discussion includes the evolution of doped ceria, doped zirconia, and multilayer hetero-structured thin film electrolytes. The newly developed nanoscale thin films and multilayer hetero-structures with improved oxygen ionic conductivity will have significant impact on SOFC devices. Introduction Background of Solid Oxide Fuel Cells (SOFC)The latest U.S. energy reviews revealed that more than 80 % of the energy consumed in the world is still produced by non-renewable energy sources such as petroleum, natural gas, and coal [1]. Moreover, it is projected that world energy consumption will grow by 56 % from 2010 to 2040. Therefore, from a long-term energy perspective, clean energy technologies are needed to utilize primary energy

show abstract

Fuel Cell and Electrolysis Studies with Dual Phase Proton and Oxide Ion Conduction

Sun

2010

Molten Salts and Ionic Liquids

View full text Add to dashboard Cite

Calcium doped ceria-based materials for cost-effective intermediate temperature solid oxide fuel cells

Cited by 53 publications

References 17 publications

Role of the salt phase in GDC and alumina-based composites

Role of the salt phase in GDC and alumina-based composites

State-of-the-Art Thin Film Electrolytes for Solid Oxide Fuel Cells

Fuel Cell and Electrolysis Studies with Dual Phase Proton and Oxide Ion Conduction

Contact Info

Product

Resources

About