质子传导电解质 BaCe0.7Zr0.1Y0.1Yb0.1O3-δ 中的电输运特征和 H/D 同位素效应

IF 3.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences Pub Date : 2024-07-05 DOI:10.1016/j.solidstatesciences.2024.107625

E.P. Antonova , E.V. Gordeev , K.A. Fedorova

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引用次数: 0

摘要

使用四探针直流电（DC）法研究了质子传导电解质 BaCe0.7Zr0.1Y0.1Yb0.1O3-δ 的电学特性，该特性取决于温度和大气中的氧分压（用 H2O 和 D2O 加湿）。确定了离子和电子空穴对电导率的贡献，并计算了电荷载流子的传输数。结果表明，在空气条件下，BaCe0.7Zr0.1Y0.1Yb0.1O3-δ 是一种离子-电子空穴混合导体。随着温度和氧分压的降低，电子空穴导体的贡献率也随之降低。在所有研究条件下，电导率都受到同位素 H/D 的明显影响，表现为在含 D2O 的气氛中，电导率随着活化能值的增加而降低。用 D2O 替代 H2O 会导致离子传输数和离子电导率值下降，而电子空穴电导率几乎保持不变。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Features of electrical transport and H/D isotope effects in the proton-conducting electrolyte BaCe0.7Zr0.1Y0.1Yb0.1O3-δ

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Features of electrical transport and H/D isotope effects in the proton-conducting electrolyte BaCe0.7Zr0.1Y0.1Yb0.1O3-δ

The electrical properties of the proton-conducting electrolyte BaCe_0.7Zr_0.1Y_0.1Yb_0.1O_3-δ were studied using the 4-probe direct current (DC) method depending on temperature and oxygen partial pressure in the atmospheres, humidified with H₂O and D₂O. Ionic and electron hole contributions to the electrical conductivity were determined, and the transport numbers of charge carriers were calculated. It is shown that in air conditions BaCe_0.7Zr_0.1Y_0.1Yb_0.1O_3-δ is a mixed ion-electron hole conductor. The contribution of electron hole conductivity decreases with the decrease of temperature and oxygen partial pressure. A significant isotope H/D effect in the electrical conductivity is observed for all investigated conditions expressed in the decrease in conductivity in D₂O-containing atmospheres with the increase of activation energy values. Replacing H₂O with D₂O leads to decrease in the ion transport numbers and ionic conductivity values, while the electron hole conductivity remains almost the same.

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来源期刊

Solid State Sciences 化学-无机化学与核化学

CiteScore

6.60

自引率

2.90%

发文量

214

审稿时长

27 days

期刊介绍： Solid State Sciences is the journal for researchers from the broad solid state chemistry and physics community. It publishes key articles on all aspects of solid state synthesis, structure-property relationships, theory and functionalities, in relation with experiments. Key topics for stand-alone papers and special issues: -Novel ways of synthesis, inorganic functional materials, including porous and glassy materials, hybrid organic-inorganic compounds and nanomaterials -Physical properties, emphasizing but not limited to the electrical, magnetical and optical features -Materials related to information technology and energy and environmental sciences. The journal publishes feature articles from experts in the field upon invitation. Solid State Sciences - your gateway to energy-related materials.