Ab initio and experimental oxygen ion conductivities in Sm-Zr and Gd-Zr co-doped ceria

The relationship between the optical phonon parameters and the oxygen ion conductivities were investigated for AlYb co-doped zirconia ceramics. Intrinsic intragrain ion conductivity, σdc, decreased with increasing Al loading into ytterbia-stabilized zirconia, while the damping parameter of the lattice vibration, γ1TO, increased. This phenomenon agreed with findings of our previous study, which revealed a relationship between the σdc and the γ1TO for zirconia-based ion conductors.

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Structure, Ionic Transport Properties and Scaling Behavior of Eu, Pr, and Sm Co-Doped Ceria Oxygen Ion Conductors

physica status solidi (a) ◽

10.1002/pssa.201800352 ◽

2018 ◽

Vol 216 (2) ◽

pp. 1800352 ◽

Cited By ~ 3

Author(s):

Sk. Anirban ◽

Abhigyan Dutta

Keyword(s):

Transport Properties ◽

Ionic Transport ◽

Scaling Behavior ◽

Doped Ceria ◽

Oxygen Ion ◽

Oxygen Ion Conductors ◽

Co Doped ◽

Ion Conductors

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Ab initio atomistic description of temperature-induced phase changes: The cases of zirconia and Ti-Y-co-doped zirconia

Physical Review Materials ◽

10.1103/physrevmaterials.5.023603 ◽

2021 ◽

Vol 5 (2) ◽

Author(s):

Fabio Negreiros Ribeiro ◽

Dolores Ribeiro Ricci Lazar ◽

Valter Ussui ◽

Nelson Batista de Lima ◽

Juliana Marchi ◽

...

Keyword(s):

Ab Initio ◽

Phase Changes ◽

Co Doped

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Doped Ceria Based Solid Oxide Fuel Cell Electrolytes and their Sintering Aspects: An Overview

Materials Science Forum ◽

10.4028/www.scientific.net/msf.835.199 ◽

2016 ◽

Vol 835 ◽

pp. 199-236 ◽

Cited By ~ 1

Author(s):

Pradyot Datta

Keyword(s):

Power Generation ◽

Fuel Cell ◽

Solid Oxide Fuel Cell ◽

Operating Temperature ◽

Solid Oxide ◽

Ion Conductivity ◽

Doped Ceria ◽

Oxide Fuel ◽

Oxygen Ion Conductivity ◽

Oxygen Ion

Depletion of fossil fuel at an alarming rate is a major concern of humankind. Consequently, researchers all over the world are putting a concerted effort for finding alternative and renewable energy. Solid oxide fuel cell (SOFC) is one such system. SOFCs are electrochemical devices that have several advantages over conventional power generation systems like high efficiency of power generation, low emission of green house gases and the fuel flexibility. The major research focus of recent times is to reduce the operating temperature of SOFC in the range of 500 to 700 °C so as to render it commercially viable. This reduction in temperature is largely dependent on finding an electrolyte material with adequate oxygen ion conductivity at the intended operating temperature. One much material is Gadolinia doped Ceria (CGO) that shows very good oxygen ion conductivity at the intended operation temperature. The aim of this overview is to highlight the contribution that materials chemistry has made to the development of CGO as an electrolyte.

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