Key Laboratory for Colloid and Interface Chemistry of State Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China.
Beijing Computational Science Research Center, No.10 East Xibeiwang Road, Haidian District, Beijing, 100193, China.
Angew Chem Int Ed Engl. 2016 Aug 22;55(35):10448-52. doi: 10.1002/anie.201605102. Epub 2016 Jul 26.
The rapid development of advanced energy-storage devices requires significant improvements of the electrode performance and a detailed understanding of the fundamental energy-storage processes. In this work, the self-assembly of two-dimensional manganese oxide nanosheets with various metal cations is introduced as a general and effective method for the incorporation of different guest cations and the formation of sandwich structures with tunable interlayer distances, leading to the formation of 3D Mx MnO2 (M=Li, Na, K, Co, and Mg) cathodes. For sodium and lithium storage, these electrode materials exhibited different capacities and cycling stabilities. The efficiency of the storage process is influenced not only by the interlayer spacing but also by the interaction between the host cations and shutter ions, confirming the crucial role of the cations. These results provide promising ideas for the rational design of advanced electrodes for Li and Na storage.
先进储能设备的快速发展需要显著提高电极性能，并深入了解基本储能过程。在这项工作中，引入了二维锰氧化物纳米片与各种金属阳离子的自组装，作为一种通用且有效的方法，可以掺入不同的客体阳离子，并形成具有可调层间距的夹层结构，从而形成 3D Mx MnO2（M=Li、Na、K、Co 和 Mg）正极。对于钠和锂的存储，这些电极材料表现出不同的容量和循环稳定性。存储过程的效率不仅受到层间距的影响，还受到主阳离子和快门离子之间相互作用的影响，证实了阳离子的关键作用。这些结果为合理设计用于 Li 和 Na 存储的先进电极提供了有前景的思路。
