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Определение коэффициента химической диффузии и константы поверхностного обмена кислородом PrBaCo2-xFexO6-δ (x = 0; 0.2)

Authors: Zakiryanov, P. O.; Ivanov, I. L.;

Определение коэффициента химической диффузии и константы поверхностного обмена кислородом PrBaCo2-xFexO6-δ (x = 0; 0.2)

Abstract

This work is devoted to the determination of chemical diffusion coefficients (Dchem) and surface oxygen exchange constants (Kchem) for double perovskite of the composition PrBaCo2-xFexO6-δ (x = 0; 0.2), which is a promising cathode material.There are already works devoted to determining the parameters of oxygen transport in PrBaCo2O6-δ, but the influence of the doping degree of the base compound on these parameters has been little studied. Within the framework of this work, for the studied compounds, the values of oxygen nonstoichiometry were determined by thermogravimetric analysis. Dchem and Kchem were determined by the method of relaxation of the total electrical conductivity (ECR).

Данная работа посвящена определению коэффициентов химической диффузии (Dchem) и констант поверхностного обмена кислородом (Kchem) для двойного перовскита состава PrBaCo2-xFexO6-δ (x = 0; 0.2), являющегося перспективным катодным материалом. Уже существуют работы, посвященные определению параметров кислородного переноса в PrBaCo2O6-δ, но влияние степени допирования базового соединения на эти параметры мало изучены. В рамках данной работы, для исследуемых соединений, методом термогравиметрического анализа были определены значения кислородной нестехиометрии. Методом релаксации общей электропроводности (ECR) были определены Dchem и Kchem.

Работа была выполнена при поддержке гранта РНФ №22-23-00834

Keywords

КИСЛОРОДНАЯ НЕСТЕХИОМЕТРИЯ, ДВОЙНОЙ ПЕРОВСКИТ, КАТОДНЫЙ МАТЕРИАЛ, SURFACE EXCHANGE CONSTANT, КОНСТАНТА ПОВЕРХНОСТНОГО ОБМЕНА, ТВЕРДООКСИДНЫЙ ТОПЛИВНЫЙ ЭЛЕМЕНТ, CHEMICAL DIFFUSION COEFFICIENT, DOUBLE PEROVSKITE, SOLID OXIDE FUEL CELL, OXYGEN NONSTOICHIOMETRY, КОЭФФИЦИЕНТ ХИМИЧЕСКОЙ ДИФФУЗИИ, ECR, CATHODE MATERIAL

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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