scholarly journals Electrode and Electrolyte Materials From Atomistic Simulations: Properties of LixFEPO4 Electrode and Zircon-Based Ionic Conductors

2021 ◽  
Vol 9 ◽  
Author(s):  
Piotr M. Kowalski ◽  
Zhengda He ◽  
Oskar Cheong
Keyword(s):  
Energy Storage ◽  
Ceramic Materials ◽  
Yttria Stabilized Zirconia ◽  
Miscibility Gap ◽  
Ambient Conditions ◽  
Ionic Conductors ◽  
Stabilized Zirconia ◽  
Energy Storage Devices ◽  
Energy Applications ◽  
Pyrochlore Type

LixFePO4 orthophosphates and fluorite- and pyrochlore-type zirconate materials are widely considered as functional compounds in energy storage devices, either as electrode or solid state electrolyte. These ceramic materials show enhanced cation exchange and anion conductivity properties that makes them attractive for various energy applications. In this contribution we discuss thermodynamic properties of LixFePO4 and yttria-stabilized zirconia compounds, including formation enthalpies, stability, and solubility limits. We found that at ambient conditions LixFePO4 has a large miscibility gap, which is consistent with existing experimental evidence. We show that cubic zirconia becomes stabilized with Y content of ~8%, which is in line with experimental observations. The computed activation energy of 0.92eV and ionic conductivity for oxygen diffusion in yttria-stabilized zirconia are also in line with the measured data, which shows that atomistic modeling can be applied for accurate prediction of key materials properties. We discuss these results with the existing simulation-based data on these materials produced by our group over the last decade. Last, but not least, we discuss similarities of the considered compounds in considering them as materials for energy storage and radiation damage resistant matrices for immobilization of radionuclides.

Effect of Second Phase Particles on Solid Particles Erosion of Air Plasma Sprayed Yttria Stabilized Zirconia

2021 ◽  
Vol 875 ◽  
pp. 302-314
Author(s):  
Noveed Ejaz ◽  
Liaqat Ali ◽  
Muhammad Mansoor
Keyword(s):  
Mechanical Response ◽  
Ceramic Materials ◽  
Solid Particles ◽  
Yttria Stabilized Zirconia ◽  
Second Phase ◽  
Air Plasma ◽  
Ambient Conditions ◽  
Stabilized Zirconia ◽  
Phase Component ◽  
Plasma Sprayed

Yttria stabilized zirconia (YSZ) based composite topcoats were prepared with three advanced ceramic materials as second phase component; CaZrO3, (La0.75Nd0.25)2Zr2O7 and Nd2Ce2O7. The solid particles erosion (SPE) testing of the air plasma sprayed composite topcoats was carried out at room temperature and 900 °C to study the effects of second phase on erosion behavior. The erodent was angular fused alumina of 40-45 mm size. The erosion mechanism was followed in all topcoats with cracking and fracturing of the plasma sprayed splats due to erodent particles impact and impingement, whereas micro-ploughing was observed after 900 °C SPE testing as an additional feature. The hardness and intrinsic properties of second phase component in the composite topcoats played a crucial role in improving the erosion rate (ER) at ambient as well as 900 °C. The Nd2Ce2O7/YSZ topcoat show lower ER due to combatively higher hardness of Nd2Ce2O7 and good interfacial bonding with YSZ. The overall lowering of ER at 900 °C as compared to that of at ambient conditions was ascribed to the anelastic mechanical response of the ceramic topcoats due to thermal cycling involved in the SPE testing at high temperature.

Synthesis of Gadolinium Zirconate by Coprecipitaiton and Its Properties for TBC Application

2007 ◽  
Vol 280-283 ◽  
pp. 1501-1502 ◽  
Author(s):  
Cai-Lin Wang ◽  
Wei Pan ◽  
Qiu Xu ◽  
C.J. Jiang ◽  
Kazutaka Mori ◽  
...  
Keyword(s):  
Gas Turbines ◽  
Ceramic Materials ◽  
Yttria Stabilized Zirconia ◽  
Thermal Barrier ◽  
Stabilized Zirconia ◽  
Barrier Coatings ◽  
Gadolinium Zirconate ◽  
Long Term Stability ◽  
Sintering Behaviour

The increase of the efficiency for gas turbines leads to the increasing combustion-chambertemperatures. Rapid degradation of the conventional yttria-stabilized zirconia coatings does not fulfill therequirements at these temperatures for a reliable thermal barrier coatings (TBCs) due to the phasetransformation of zirconia and the sintering behaviour. Therefore, it is very important to develop novel ceramic materials for TBCs with low thermal conductivity and long-term stability at high temperatures.In this paper, the developments of potential novel ceramic materials for TBCs with low thermalconductivity are reviewed.

Epitaxial Yttria-Stabilized Zirconia on Muscovite for Flexible Transparent Ionic Conductors

2018 ◽  
Vol 1 (12) ◽  
pp. 6890-6896 ◽  
Author(s):  
Ping-Chun Wu ◽  
Yu-Ping Lin ◽  
Yung-Hsiang Juan ◽  
Yao-Ming Wang ◽  
Do Thi-Hien ◽  
...  
Keyword(s):  
Yttria Stabilized Zirconia ◽  
Ionic Conductors ◽  
Stabilized Zirconia

Processing of Swnt-Reinforced Yttria Stabilized Zirconia by Spark Plasma Sintering and Microstructure Characterization

2012 ◽  
Vol 18-19 ◽  
pp. 317-323 ◽  
Author(s):  
S. de Bernardi-Martín ◽  
R. Poyato ◽  
Diego Gómez-García ◽  
Arturo Domínguez-Rodríguez
Keyword(s):  
Grain Size ◽  
Spark Plasma Sintering ◽  
Ceramic Materials ◽  
Ceramic Composites ◽  
Yttria Stabilized Zirconia ◽  
Zirconia Ceramic ◽  
Stabilized Zirconia ◽  
Single Wall Carbon ◽  
Plasma Sintering ◽  
Spark Plasma

Single wall carbon nanotube reinforced yttria stabilized zirconia ceramic materials have been obtained by means of spark plasma sintering technique. Single wall carbon nanotubes were treated in an acid solution before mixing with zirconia powders to obtain a uniform distribution of both powders. This method allows obtaining ceramic materials with a grain size between 200 nanometers and 1 micron and with a grain size distribution which depends on processing conditions. This new route opens a new perspective for new ceramic composites tailoring with enhanced mechanical properties as structural materials

La2Zr2O7 Formation Between Yttria-Stabilized Zirconia and La0.85Sr0.15MnO3 at 1373 K

1996 ◽  
Vol 453 ◽  
Author(s):  
A. Mitterdorfer ◽  
L. J. Gauckler
Keyword(s):  
Single Crystals ◽  
Electrochemical Impedance ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Lanthanum Zirconate ◽  
Force Microscopy ◽  
Transmission Electron ◽  
Pyrochlore Type ◽  
Ion Conducting ◽  
A Site

AbstractOxygen ion conducting yttria-stabilized zirconia and perovskite-type Sr-doped LaMnO3 have been widely used as solid electrolyte and cathode materials in solid oxide fuel cells. The electrochemical properties of the cathode depend largely on the nanostructure and the phase composition of the interface between cathode and electrolyte. Interfaces between single crystals of 9.5mol% Y2O3-stabilized ZrO2 and porous La0.85Sr0.15MnyO3 (y = 0.95…1.10) were investigated. Atomic force microscopy was used for interface studies of YSZ single crystals after removal of sintered perovskite cathodes. High resolution transmission electron microscopy, electron diffraction and electrochemical impedance spectroscopy were employed for interface characterization. Pyrochlore-type lanthanum zirconate formed at the interface during sintering at 1100°C. Nucleation, growth kinetics, and morphology were largely depending on cathode stoichiometry. Lanthanum zirconate formation was retarded in case of A-site deficient perovskite.

scholarly journals Pyrrolidinium Containing Ionic Liquid Electrolytes for Li-Based Batteries

Molecules ◽  
2020 ◽  
Vol 25 (24) ◽  
pp. 6002
Author(s):  
Louise M. McGrath ◽  
James F. Rohan
Keyword(s):  
Energy Storage ◽  
Electrode Materials ◽  
Layer By Layer ◽  
Polymer Gel ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Energy Applications ◽  
Gel Electrolytes ◽  
Storage Solutions ◽  
Potential Alternative

Ionic liquids are potential alternative electrolytes to the more conventional solid-state options under investigation for future energy storage solutions. This review addresses the utilization of IL electrolytes in energy storage devices, particularly pyrrolidinium-based ILs. These ILs offer favorable properties, such as high ionic conductivity and the potential for high power drain, low volatility and wide electrochemical stability windows (ESW). The cation/anion combination utilized significantly influences their physical and electrochemical properties, therefore a thorough discussion of different combinations is outlined. Compatibility with a wide array of cathode and anode materials such as LFP, V2O5, Ge and Sn is exhibited, whereby thin-films and nanostructured materials are investigated for micro energy applications. Polymer gel electrolytes suitable for layer-by-layer fabrication are discussed for the various pyrrolidinium cations, and their compatibility with electrode materials assessed. Recent advancements regarding the modification of typical cations such a 1-butyl-1-methylpyrrolidinium, to produce ether-functionalized or symmetrical cations is discussed.

Microstructural examination of modified yttria stabilized zirconia by EM analytical techniques

1986 ◽  
Vol 44 ◽  
pp. 842-843
Author(s):  
W. W. Davison ◽  
R. C. Buchanan
Keyword(s):  
Mechanical Properties ◽  
Analytical Techniques ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Transmission Microscopy ◽  
Sintering Aid ◽  
Densification Temperature ◽  
Chemical Inertness ◽  
Scanning Transmission ◽  
Microstructural Examination

Yttria stabilized zirconia (YSZ) has become a significant technological material due to its high ionic conductivity, chemical inertness, and good mechanical properties. Temperatures on the order of 1700°C are required, however, to densify YSZ to the degree necessary for good electrical and mechanical properties. A technique for lowering the densification temperature is the addition of small amounts of material which facilitate the formation of a liquid phase at comparatively low temperatures. In this study, sintered microstructures obtained from the use of Al2O3 as a sintering aid were examined with scanning, transmission, and scanning transmission microscopy (SEM, TEM, and STEM).

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