Ni-MOF coating MoS2 structures by hydrothermal intercalation as high-performance electrodes for asymmetric supercapacitors

By Liguo Yue, Xiao Wang, Taotao Sun, Hui Liu, Qi Li, Ning Wu, Hao Guo, Wu Yang. Chemical Engineering Journal, 2019

194 citations recorded by the source corpus.

Abstract Two-dimensional metal-organic frameworks and nanoflowers of the MoS2 form a composite structure as an electrode material for high-performance supercapacitor application. MoS2 expands in the accordion-type Ni-MOF layers, and -S- joins the two materials to form a Ni-MOF coating MoS2 composite structure. The composite material MoS2@Ni-MOF combines the structural characteristics of the Ni-MOF and MoS2, and effectively improves the electrochemical performance. The basic skeleton structure of the MoS2@Ni-MOF material remains unchanged, showing a remarkable specific capacitance of 1590.24 F·g−1 at a current density of 1.0 A·g−1 and an excellent cycle stability (retention rate of 87.97% after 20,000 cycles at current of 5.0 A·g−1). Due to the special composite structure of MoS2@Ni-MOF, the as-assembled MoS2@Ni-MOF//AC assymmetric supercapacitor (ASC) device exhibits a maximum energy density of 72.93 Wh·kg−1 at a power density of 375 W·Kg−1. These excellent electrochemical properties indicate that the MoS2@Ni-MOF has potential applications in energy storage devices.

Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/f00b736a584ece9b8173082639bad2e95a4cf18e