Functional materials for the IT-SOFC

Molenda, Janina; Świerczek, Konrad; Zając, Wojciech

doi:10.1016/j.jpowsour.2007.05.085

Cited by 161 publications

(74 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The addition of CGO powder to the LSCF paste might be useful, since it can result in a decrease in the shrinkage as well as in a drop in the cathode's polarisation resistance [26]. This happens, when the percolation effect appears, most likely extending the active triple phase boundary area into the porous cathode layer.…”

Section: Composite Pastes (Cng)mentioning

confidence: 99%

The Rheology of Stabilised Lanthanum Strontium Cobaltite Ferrite Nanopowders in Organic Medium Applicable as Screen Printed SOFC Cathode Layers

Burnat¹,

Ried²,

Holtappels³

et al. 2010

Fuel Cells

View full text Add to dashboard Cite

The production and optimisation of screen printing (SP) pastes containing La0.58Sr0.42Co0.21Fe0.79O3 – δ and La0.61Sr0.41Co0.19Fe0.79O3 – δ (LSCF) were investigated. The application of these nanopowders is supposed to improve the cathode's microstructure and increase its mechanical strength. Thirty seven pastes containing LSCF were carried out with variation in binders, dispersants and different particle size distribution. The rheological behaviour of these pastes was investigated. It was found that commercially available dispersant Solsperse 3000 resulted in the best suspension stability, achieving almost 55 times lower viscosity value for pastes containing 20 vol.‐%, than pastes without any dispersants. The shear thinning behaviour was found to be favourable for the LSCF cathode deposition. A cathode made from the mixture of nano and submicron powder exhibits a polarisation resistance as low as 0.76 Ω cm2 at 592 °C.

show abstract

Section: Composite Pastes (Cng)mentioning

confidence: 99%

The Rheology of Stabilised Lanthanum Strontium Cobaltite Ferrite Nanopowders in Organic Medium Applicable as Screen Printed SOFC Cathode Layers

Burnat¹,

Ried²,

Holtappels³

et al. 2010

Fuel Cells

View full text Add to dashboard Cite

show abstract

“…SOFCs have attracted significant attention in the last 20-30 years due to their high efficiency, fuel flexibility and environmental advantages (Minh, 2004;Molenda et al, 2007;McIntosh & Gorte, 2004). However, typical SOFCs operate at 1000 ºC.…”

Section: Solid Oxide Fuel Cells and Its Componentsmentioning

confidence: 99%

Infrared Spectroscopy Techniques in the Characterization of SOFC Functional Ceramics

Macedo¹,

Cesário²,

Souza³

et al. 2012

Infrared Spectroscopy - Materials Science, Engineering and Technology

View full text Add to dashboard Cite

“…Solid oxide fuel cells (SOFCs) are solid-state electrochemical devices that convert chemical energy of a fuel directly into electrical energy [1][2][3]. Currently, 8 mol-% Y 2 O 3 -ZrO 2 (YSZ) is used as a solid electrolyte in conventional SOFCs, while anode and cathode materials are Ni-YSZ cermets and La 1-x Sr x MnO 3 oxide, respectively [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Improvement of Electrical Conductivity of Trivalent Rare‐earth Cation‐doped Neodymium Zirconate by Co‐doping Gadolinium and Ytterbium

2010

View full text Add to dashboard Cite

Pyrochlore oxides of A2Zr2O7, where A represents trivalent rare‐earth elements, have a high electrical conductivity, which makes them suitable for applications as high‐temperature solid electrolytes. The influence of Gd and Yb cations co‐doping at the Nd site on structure and electrical conductivity of a pyrochlore oxide Nd2Zr2O7 is investigated using X‐ray diffraction and impedance spectra measurements. Different zirconate ceramics of Nd2Zr2O7, Nd1.8Gd0.2Zr2O7, Nd1.8Gd0.1Yb0.1Zr2O7, Nd1.4Gd0.6Zr2O7 and Nd1.4Gd0.3Yb0.3Zr2O7 are prepared by pressureless‐sintering method at 1,973 K for 10 h in air. Nd2Zr2O7 doped with Gd and Yb cations at the Nd site exhibit a single phase of pyrochlore‐type structure. The measured values of the total conductivity obey the Arrhenius relation. Nd2Zr2O7 and its doped zirconate ceramics are oxide‐ion conductors in the oxygen partial pressure range of 1.0 × 10–4 to 1.0 atm at all test temperature levels. The total conductivity increases with reducing average ionic radii of A‐site rare‐earth cations. The dual Yb+Gd intermix doping causes a distinctly enhanced total conductivity as compared to unmodified Nd2Zr2O7 and singly Gd‐doped zirconate ceramics. The highest total conductivity value obtained in this work is 1.02 × 10–2 S cm × 1 at 1,173 K for Nd1.4Gd0.3Yb0.3Zr2O7 ceramic.

show abstract

Functional materials for the IT-SOFC

Cited by 161 publications

References 65 publications

The Rheology of Stabilised Lanthanum Strontium Cobaltite Ferrite Nanopowders in Organic Medium Applicable as Screen Printed SOFC Cathode Layers

The Rheology of Stabilised Lanthanum Strontium Cobaltite Ferrite Nanopowders in Organic Medium Applicable as Screen Printed SOFC Cathode Layers

Infrared Spectroscopy Techniques in the Characterization of SOFC Functional Ceramics

Improvement of Electrical Conductivity of Trivalent Rare‐earth Cation‐doped Neodymium Zirconate by Co‐doping Gadolinium and Ytterbium

Contact Info

Product

Resources

About