Synthesis and sintering of Ce1-xGdxO2-x/2 nanopowders via chemical routes.

2002 ◽  
Vol 756 ◽  
Author(s):  
Agusti Sin ◽  
Antonino S. Aricò ◽  
Massimo Seregni ◽  
Laura Gullo ◽  
Daniela La Rosa ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Grain Boundaries ◽  
Ac Impedance ◽  
Doped Ceria ◽  
Structural Morphology ◽  
Impedance Measurements ◽  
Acrylamide Polymerization ◽  
Co Precipitation ◽  
Nanopowder Synthesis

ABSTRACTGd-doped ceria (Ce0.80Gd0.20O1.90) obtained by several nanopowder synthesis processes are compared structurally, morphologically and electrochemically. The powders have been sintered into pellets and investigated by ac-impedance measurements. The electrochemical properties of the electrolytes have been correlated to the structural morphology of the sintered pellets. When the intergrain region exhibits an elevated interdiffusion, the observation of the grain boundaries becomes difficult while the electrochemical properties are improved. Acrylamide polymerization and oxalic co-precipitation techniques showed the best properties.

Electrochemical properties of dual phase neodymium-doped ceria alkali carbonate composite electrolytes in intermediate temperature

2015 ◽  
Vol 275 ◽  
pp. 563-572 ◽  
Author(s):  
Ji-Tae Kim ◽  
Tae-Hee Lee ◽  
Ka-Young Park ◽  
Yongho Seo ◽  
Ki Buem Kim ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Intermediate Temperature ◽  
Dual Phase ◽  
Doped Ceria ◽  
Composite Electrolytes ◽  
Alkali Carbonate

Preparation and Characterization of Nanocomposite Calcium Doped Ceria Electrolyte With Alkali Carbonates (NK-CDC) for SOFC

2010 ◽  
Author(s):  
Ghazanfar Abbas ◽  
Rizwan Raza ◽  
Muhammad Ashraf Chaudhry ◽  
Bin Zhu
Keyword(s):  
Electron Microscopy ◽  
Fossil Fuels ◽  
Electrochemical Impedance ◽  
Renewable Energy Sources ◽  
Precipitation Method ◽  
Molar Ratio ◽  
Doped Ceria ◽  
Alternative Source ◽  
Calcium Doped ◽  
Co Precipitation

The entire world’s challenge is to find out the renewable energy sources due to rapid depletion of fossil fuels because of their high consumption. Solid Oxide Fuel Cells (SOFCs) are believed to be the best alternative source which converts chemical energy into electricity without combustion. Nanostructured study is required to develop highly ionic conductive electrolyte for SOFCs. In this work, the calcium doped ceria (Ce0.8Ca0.2O1.9) coated with 20% molar ratio of two alkali carbonates (CDC-M: MCO3, where M = Na and K) electrolyte was prepared by co-precipitation method in this study. Ni based electrode was used to fabricate the cell by dry pressing technique. The crystal structure and surface morphology was characterized by X-Ray Diffractometer (XRD), Scanning Electron Microscopy (SEM) and High Resolution Transmission Electron Microscopy (HRTEM). The particle size was calculated in the range of 10–20nm by Scherrer’s formula and compared with SEM and TEM results. The ionic conductivity was measured by using AC Electrochemical Impedance Spectroscopy (EIS) method. The activation energy was also evaluated. The performance of the cell was measured 0.567W/cm2 at temperature 550°C with hydrogen as a fuel.

Synthesis of LiNi0.5 Mn1.5 O4 via Ammonia-free Co-precipitation Method: Insight in the Effects of the Lithium Additions on the Morphology, Structure and Electrochemical properties

2019 ◽  
Vol 4 (1) ◽  
pp. 393-398 ◽  
Author(s):  
Yongxiang Chen ◽  
Yunjiao Li ◽  
Shuyun Tang ◽  
Jia Guo ◽  
Tongxing Lei ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Precipitation Method ◽  
Co Precipitation

Facile synthesis of doped ceria‐based oxide by co‐precipitation technique and performance evaluation in solid oxide fuel cell

2020 ◽  
Vol 17 (4) ◽  
pp. 1769-1784
Author(s):  
Shoroshi Dey ◽  
Debasmita Choudhury ◽  
Mayuri Choudhuri ◽  
Abir Bhattacharya ◽  
Jayanta Mukhopadhyay ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Solid Oxide ◽  
Doped Ceria ◽  
Oxide Fuel ◽  
Facile Synthesis ◽  
Precipitation Technique ◽  
And Performance ◽  
Co Precipitation

scholarly journals Potentiostatic, Potentiodynamic and Impedance Study of TiO2 Layers Deposited of 316 LVM Steel Used for Coronary Stents

2016 ◽  
Vol 61 (2) ◽  
pp. 821-824 ◽  
Author(s):  
M. Basiaga ◽  
M. Staszuk ◽  
W. Walke ◽  
T. Tański ◽  
W. Kajzer
Keyword(s):  
Electrochemical Properties ◽  
Process Parameters ◽  
Coronary Stents ◽  
Surface Processing ◽  
Impedance Measurements ◽  
Impedance Study ◽  
Modified Surface ◽  
Selection Of

Abstract The objective of the study is assessment of suitability of the ALD method for application of a TiO2 layer on surface of 316LVM steel used for production of vessel stents. Selection of the appropriate process parameters for application of the layer affects its electrochemical properties, which largely determine resistance of the biomaterial to corrosion in the blood environment, thus affecting its hemocompatibility. To assess resistance of the AISI 316LVM steel with modified surface to corrosion, voltammetric and impedance measurements were conducted. The proposed variant of surface processing allows safe deformation of the TiO2 layer without its delamination.

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