期刊
INORGANIC CHEMISTRY FRONTIERS
卷 9, 期 17, 页码 4486-4494出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2qi00740a
关键词
-
资金
- National Natural Science Foundation of China [22090043, 21527803, 21621061, 21965008]
- Guangxi Natural Science Foundation [2019GXNSFGA245006, 2021GXNSFFA220002]
- Ministry of Science and Technology of China [2016YFA0301004]
- China Postdoctoral Science Foundation [8206300392]
Mixed electronic and oxide ionic conduction was introduced in InGe2O7 through Zn2+ substitution for In3+. The obtained In1-xZnxGe2O7-0.5x exhibited high bulk conductivity at 1000 degrees C and showed potential applications in electrode materials for SOFCs.
Mixed electronic and oxide ionic conduction was introduced in InGe2O7 containing isolated Ge2O7 units through the substitution of Zn2+ for In3+. The solid solution limit of Zn doping in In2-xZnxGe2O7-0.5x is 0-0.2, as confirmed by Rietveld refinements and systematic experiments. The bulk conductivities of the obtained In1-xZnxGe2O7-0.5x (x = 0.2) can reach 1.62 x 10(-2) S cm(-1) at 1000 degrees C with oxygen transport number of similar to 20%. Moreover, variable temperature XRD patterns of In1-xZnxGe2O7-0.5x (x = 0.2) show the superior phase stability in the temperature region of 25-1000 degrees C with potential applications in electrode materials for SOFCs. Oxide ion conduction is ascribed to the preferred oxygen vacancies of the O1 site introduced by the substitution of Zn2+ for In3+, and the BVEL calculations indicate that the migration of oxygen vacancies is achieved by oxygen exchange between adjacent Ge2O7 units and exhibits two-dimensional anisotropic transport in monoclinic In2Ge2O7.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据