材料科学
石墨烯
化学气相沉积
异质结
阳极
单层
纳米孔
基质(水族馆)
光电子学
纳米技术
储能
外延
化学工程
电极
图层(电子)
地质学
工程类
物理化学
功率(物理)
物理
化学
海洋学
量子力学
作者
Negar Zebardastan,Jonathan Bradford,Bharati Gupta,Josh Lipton‐Duffin,Jennifer MacLeod,Hong Duc Pham,Deepak P. Dubal,Kostya Ken Ostrikov,Annalena Wolff,Kailong Hu,Yoshikazu Ito,Carlo Mariani,Maria Grazia Betti,Nunzio Motta
标识
DOI:10.1002/admt.202100963
摘要
Abstract Layered molybdenum disulphide (MoS 2 ) crystals in combination with graphene create the opportunity for the development of heterostructures with tailored surface and structural properties for energy storage applications. Herein, 2D heterostructures are developed by growing MoS 2 on epitaxial and self‐standing nanoporous graphene (NPG) using chemical vapor deposition (CVD). The effect of substrate as well as different CVD growth parameters such as temperature, amount of sulfur and MoO 3 precursors, and argon flow on the growth of MoS 2 is systematically investigated. Interestingly, various structures of MoS 2 such as monolayer triangular islands, spirals, standing sheets, and irregular stacked multilayered MoS 2 are successfully developed. The growth mechanism is proposed using different advanced characterization techniques. The formation of a continuous wetting layer with grain boundaries over the surface prior to formation of any other structures is detected. As a proof of principle, MoS 2 /NPG is employed for the first time as anode material in potassium ion battery. The electrode delivers a specific capacity of 389 mAh g −1 with over 98% stability after 200 cycles. The porous structures clearly facilitate the ion transport which is beneficial for the ion battery. These encouraging results open new opportunities to develop hierarchical heterostructures of 2D‐materials for next‐generation energy storage technologies.
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