Department of Chemistry, Bar Ilan Institute of Nanotechnology and Advanced Materials (BINA), Bar Ilan University, Ramat Gan, 5290002, Israel.
Faculty of Engineering, Bar Ilan Institute of Nanotechnology and Advanced Materials (BINA), Bar Ilan University, Ramat Gan, 5290002, Israel.
Sci Rep. 2017 Jun 12;7(1):3280. doi: 10.1038/s41598-017-03453-x.
Herein, we report energy storage devices, which are based on densely packed, vertically aligned MoS (VA-MoS) or planar oriented MoS (PO-MoS) and compare their electrochemical performances. The VA-MoS films have been processed by chemical vapor deposition (CVD) to reach unprecedented micron-scale thick films while maintaining the vertical alignment for the whole thickness. The VA-MoS and the PO-MoS films form a high-performance Li-ion electrode, reaching the theoretical limits of reversible capacity for this material (800 mAh/g; twice the specific capacity of graphite). The vertical alignment allows faster charge-discharge rates while maintaining a high specific capacity (C-rate measurements). Noteworthy, the reversible cycling of the Li-ion electrode also benefits from the vertical alignment. In this article, we present the full synthesis, structural and electrochemical characterization of VA-MoS along with the properties of PO-MoS to deconvolute the intrinsic properties of MoS from the influence of the layers' orientation.
在此，我们报告了基于密排垂直取向 MoS（VA-MoS）或平面取向 MoS（PO-MoS）的储能器件，并比较了它们的电化学性能。VA-MoS 薄膜通过化学气相沉积（CVD）处理，达到了前所未有的微米级厚膜，同时保持了整个厚度的垂直取向。VA-MoS 和 PO-MoS 薄膜形成了高性能的锂离子电极，达到了该材料理论上可逆容量的极限（800 mAh/g；是石墨比容量的两倍）。垂直取向允许更快的充放电速率，同时保持高比容量（C 率测量）。值得注意的是，锂离子电极的可逆循环也受益于垂直取向。在本文中，我们介绍了 VA-MoS 的全合成、结构和电化学特性，以及 PO-MoS 的特性，以从层取向的影响中推断出 MoS 的固有特性。
