Wang Le, Yang Zhenzhong, Samarakoon Widitha S, Zhou Yadong, Bowden Mark E, Zhou Hua, Tao Jinhui, Zhu Zihua, Lahiri Nabajit, Droubay Timothy C, Lebens-Higgins Zachary, Yin Xinmao, Tang Chi Sin, Feng Zhenxing, Piper Louis F J, Wee Andrew T S, Chambers Scott A, Du Yingge
Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States.
Key Laboratory of Polar Materials and Devices (MOE) and Department of Electronics, East China Normal University, Shanghai 200062, China.
Nano Lett. 2022 Jul 13;22(13):5530-5537. doi: 10.1021/acs.nanolett.2c01701. Epub 2022 Jun 30.
Epitaxial growth is a powerful tool for synthesizing heterostructures and integrating multiple functionalities. However, interfacial mixing can readily occur and significantly modify the properties of layered structures, particularly for those containing energy storage materials with smaller cations. Here, we show a two-step sequence involving the growth of an epitaxial LiCoO cathode layer followed by the deposition of a binary transition metal oxide. Orientation-controlled epitaxial synthesis of the model solid-state-electrolyte LiWO and anode material LiTiO occurs as WO and TiO nucleate and react with Li ions from the underlying cathode. We demonstrate that this lithiation-assisted epitaxy approach can be used for energy materials discovery and exploring different combinations of epitaxial interfaces that can serve as well-defined model systems for mechanistic studies of energy storage and conversion processes.
外延生长是一种用于合成异质结构和整合多种功能的强大工具。然而，界面混合很容易发生，并会显著改变层状结构的性质，特别是对于那些含有较小阳离子的储能材料的结构。在这里，我们展示了一个两步过程，包括外延生长LiCoO阴极层，然后沉积二元过渡金属氧化物。当WO和TiO成核并与来自下层阴极的锂离子反应时，会发生取向控制的外延合成模型固态电解质LiWO和阳极材料LiTiO。我们证明，这种锂化辅助外延方法可用于能源材料发现，并探索外延界面的不同组合，这些组合可作为储能和转换过程机理研究的明确模型系统。
