A high-entropy manganite in an ordered nanocomposite for long-term application in solid oxide cells.
A high-entropy manganite in an ordered nanocomposite for long-term application in solid oxide cells.
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DOI：
10.1038/s41467-021-22916-4
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发表时间：
2021-05-11
影响因子：
16.6
通讯作者：
Tarancon A
中科院分区：
文献类型：
--
作者：
Baiutti F;Chiabrera F;Acosta M;Diercks D;Parfitt D;Santiso J;Wang X;Cavallaro A;Morata A;Wang H;Chroneos A;MacManus-Driscoll J;Tarancon A
纳米工程复合氧化物的实施为开发具有增强电化学性能的新型功能材料开辟了道路。在此，我们报告了亚锰酸锶镧和掺杂二氧化铈的垂直排列纳米复合材料的实现，可直接用作高温能量转换器件中的功能层。通过使用补充的最先进技术（包括原子探针断层扫描与氧同位素交换相结合）进行详细分析，我们评估了局部结构和电化学功能，并允许直接观察局部快速氧扩散路径。由此产生的有序介观结构的特点是连贯、密集的垂直界面阵列，表现出高电化学活性和抑制的掺杂剂偏析。根据密度泛函理论计算，后者归因于自发的阳离子混合，从而实现晶格稳定。这项工作强调了功能氧化物纳米工程中局部无序和长程排列的相关性，并介绍了一种用于质量传输现象局部分析的先进方法。固体氧化物电池的电极功能层需要兼具高反应活性和热稳定性。在这里，作者提出了一种自组装的垂直排列的亚锰酸锶镧和掺杂二氧化铈纳米复合材料，作为高温应用的功能层。
The implementation of nano-engineered composite oxides opens up the way towards the development of a novel class of functional materials with enhanced electrochemical properties. Here we report on the realization of vertically aligned nanocomposites of lanthanum strontium manganite and doped ceria with straight applicability as functional layers in high-temperature energy conversion devices. By a detailed analysis using complementary state-of-the-art techniques, which include atom-probe tomography combined with oxygen isotopic exchange, we assess the local structural and electrochemical functionalities and we allow direct observation of local fast oxygen diffusion pathways. The resulting ordered mesostructure, which is characterized by a coherent, dense array of vertical interfaces, shows high electrochemically activity and suppressed dopant segregation. The latter is ascribed to spontaneous cationic intermixing enabling lattice stabilization, according to density functional theory calculations. This work highlights the relevance of local disorder and long-range arrangements for functional oxides nano-engineering and introduces an advanced method for the local analysis of mass transport phenomena. Electrode functional layers for solid oxide cells require a combination of high reactivity and thermal stability. Here, the authors present a self-assembled vertically aligned nanocomposites of lanthanum strontium manganite and doped ceria as functional layers for high temperature applications.
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影响因子：
4.6
作者：
Dubbink D;Koster G;Rijnders G
通讯作者：
Rijnders G
DOI：
10.1021/acs.chemmater.6b00122
发表时间：
2016-05-10
期刊：
Chemistry of materials : a publication of the American Chemical Society
影响因子：
--
作者：
Cho S;Jang JW;Li L;Jian J;Wang H;MacManus-Driscoll JL
通讯作者：
MacManus-Driscoll JL
影响因子：
29.4
作者：
Chiabrera, Francesco;Garbayo, Inigo;Tarancon, Albert
通讯作者：
Tarancon, Albert
影响因子：
6.6
作者：
Cho, Sungmee;Kim, Young Nam;Wang, Haiyan
通讯作者：
Wang, Haiyan
影响因子：
13.6
作者：
Choi, Eun-Mi;Di Bernardo, Angelo;MacManus-Driscoll, Judith L.
通讯作者：
MacManus-Driscoll, Judith L.