Enhanced Performance of La0.6Sr0.4Co0.2Fe0.8O3-\delta(LSCF) Cathodes with Graded Microstructure Fabricated by Tape Casting

Nie, Lei; Liu, Ze; Liu, Mingfei; Yang, Lei; Zhang, Yujun; Liu, Meilin

doi:10.5229/jecst.2010.1.1.050

Cited by 18 publications

(2 citation statements)

References 19 publications

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“…Cathode thin films can also be fabricated using tape casting, as demonstrated by Nie et al (2010b) in producing a porous LSCF cathode. Layers of LSCF cathode were fabricated to reduce the interfacial resistance of the cathode.…”

Section: Fabrication Of Composite Cathode Componentsmentioning

confidence: 99%

Development of lanthanum strontium cobalt ferrite composite cathodes for intermediate- to low-temperature solid oxide fuel cells

Baharuddin

Rahman

Muchtar

et al. 2013

J. Zhejiang Univ. Sci. A

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Solid oxide fuel cells (SOFCs) offer high energy conversion, low noise, low pollutant emission, and low processing cost. Despite many advantages, SOFCs face a major challenge in competing with other types of fuel cells because of their high operating temperature. The necessity to reduce the operational temperature of SOFCs has led to the development of research into the materials and fabrication technology of fuel cells. The use of composite cathodes significantly reduces the cathode polarization resistance and expands the triple phase boundary area available for oxygen reduction. Powder preparation and composite cathode fabrication also affect the overall performance of composite cathodes and fuel cells. Among many types of cathode materials, lanthanum-based materials such as lanthanum strontium cobalt ferrite (La 1-x Sr x Co 1-y Fe y O 3-δ ) have recently been discovered to offer great compatibility with ceria-based electrolytes in performing as composite cathode materials for intermediate-to low-temperature SOFCs (IT-LTSOFCs). This paper reviews various ceria-based composite cathodes for IT-LTSOFCs and focuses on the aspects of progress and challenges in materials technology.

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Section: Fabrication Of Composite Cathode Componentsmentioning

confidence: 99%

Development of lanthanum strontium cobalt ferrite composite cathodes for intermediate- to low-temperature solid oxide fuel cells

Baharuddin

Rahman

Muchtar

et al. 2013

J. Zhejiang Univ. Sci. A

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show abstract

“…While particle size and sintering profile manipulation have been studied rigorously, less attention is given to the third alternative in the attempt to create relative porosity in the cathode layer. Various types of pore former have been studied extensively including graphite [4], activated carbon [5], Poly(methyl methacrylate) (PMMA) [6], polyethylene [7] and starch [8]. Pore formers are solid particle, usually organic, present during the layer processing method but decompose during the post-deposition thermal cycle.…”

Section: Introductionmentioning

confidence: 99%

Structural Change of Cathode with Pore Former Addition in SOFC

Mutalib

Othman

Aziz

et al. 2015

AMR

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Solid oxide fuel cells (SOFCs) have been considered as a promising electricity-generation technology because of the relatively high efficiency in the conversion of chemical energy to electrical power. The cathode performance of solid oxide fuel cells (SOFC) depends substantially on its surface area, porosity and microstructure, and therefore the processing method used is very important in determining cathode performance. By optimizing the structural characteristic of the layer, the cathode performance during fuel cell performance can be fully maximized. Polyether ether ketone (PEEK) pore former was introduced in the processing method of cathode layer. The cathode layer was brush painted and sintered at 1200°C for 5 hours. TGA analysis is used to specify the sintering curve for the cathode layer. In addition, three point bending test is used to investigate the change in bending force with the addition of pore former. Characterization via FESEM allows inspection over the induced pore geometry and distribution along the layer. The study can produce a comprehensive structural analysis on the pore former addition in the precursor solution of the cathode layer for SOFC application.

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Synthesis, structure and electrochemical performance of cobaltite‐based composite cathodes for IT‐SOFC

Cesário¹,

Macedo²,

Martinelli³

et al. 2012

Cryst. Res. Technol.

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The development of novel and high‐performance cathodes is a critical issue to be addressed in order to reduce Solid Oxide Fuel Cells (SOFCs) operation temperature to the 600‐800 °C range or less. The performance of CeO2‐based composite cathodes is very attractive to such operational temperatures. In this work, La0.6Sr0.4Co0.2Fe0.8O3 (LSCF) and Ce0.8Sm0.2O1.9 (SDC) powders were synthesized by different synthesis methods and mechanically mixed to prepare LSCF‐SDC composite cathodes. Screen‐printed LSCF‐SDC/CGO/LSCF‐SDC symmetrical cells were sintered at 1150 °C for 4 h and characterized by electrochemical impedance spectroscopy in static air. X‐ray diffraction and scanning electron microscopy were employed to characterize the powders. Area specific resistance values of 0.72 and 2.77 Ω cm2 at 800 °C were found for composite cathodes containing SDC powder synthesized by modified Pechini and microwave‐assisted combustion methods, respectively. Furthermore, the activation energy of the composite cathode containing SDC derived from modified Pechini method is 1.18 eV, i.e., much lower than 1.73 eV, value determined for LSCF with SDC from microwave‐combustion method.

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Enhanced Performance of La_0.6Sr_0.4Co_0.2Fe_0.8O_3-\delta(LSCF) Cathodes with Graded Microstructure Fabricated by Tape Casting

Cited by 18 publications

References 19 publications

Development of lanthanum strontium cobalt ferrite composite cathodes for intermediate- to low-temperature solid oxide fuel cells

Development of lanthanum strontium cobalt ferrite composite cathodes for intermediate- to low-temperature solid oxide fuel cells

Structural Change of Cathode with Pore Former Addition in SOFC

Synthesis, structure and electrochemical performance of cobaltite‐based composite cathodes for IT‐SOFC

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