Two-dimensional heterostructures for energy storage
Two-dimensional heterostructures for energy storage
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DOI：
10.1038/nenergy.2017.89
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发表时间：
2017-07-01
期刊：
影响因子：
56.7
通讯作者：
Gogotsi, Yury
中科院分区：
文献类型：
--
作者：
Pomerantseva, Ekaterina;Gogotsi, Yury
二维（2D）材料提供狭缝形状的离子扩散通道，使得锂和其他离子能够快速移动。然而，电子电导率、嵌入位点的数量以及延长循环期间的稳定性对于构建高性能储能器件也至关重要。虽然单个2D材料（如石墨烯）显示出一些所需的特性，但它们都不能提供最大化能量密度，功率密度和循环寿命所需的所有特性。在这里，我们认为，堆叠不同的二维材料到异质结构的架构打开了一个机会，以构建电极，将联合收割机的优点，同时消除相关的缺点。我们讨论了常见的2D材料的特性，并提供了2D异质结构电极的例子，这些电极显示了导致上级电化学性能的新现象。我们还考虑了电极制造方法，并最终概述了未来的步骤，以创建2D异质结构电极，可以大大扩展当前的储能技术。
Two-dimensional (2D) materials provide slit-shaped ion diffusion channels that enable fast movement of lithium and other ions. However, electronic conductivity, the number of intercalation sites, and stability during extended cycling are also crucial for building high-performance energy storage devices. While individual 2D materials, such as graphene, show some of the required properties, none of them can offer all properties needed to maximize energy density, power density, and cycle life. Here we argue that stacking different 2D materials into heterostructured architectures opens an opportunity to construct electrodes that would combine the advantages of the individual building blocks while eliminating the associated shortcomings. We discuss characteristics of common 2D materials and provide examples of 2D heterostructured electrodes that showed new phenomena leading to superior electrochemical performance. We also consider electrode fabrication approaches and finally outline future steps to create 2D heterostructured electrodes that could greatly expand current energy storage technologies.