Three‐Dimensional MoS₂@CNT/RGO Network Composites for High‐Performance Flexible Supercapacitors

Abstract

Two-dimensional atomically thick materials, reduced graphene oxide (RGO), and layered molybdenum disulfide (MoS ) have been investigated as potential novel energy storage materials because of their distinct physicochemical properties. These materials suffer, however, from rapid capacity decay and low rate capability. This study describes a facile, binder-free approach to fabricate large-scale, 3D network structured MoS @carbon nanotube (CNT)/RGO composites for application in flexible supercapacitor devices. The as-obtained composites possess a hierarchical porosity, and an interconnected framework. The electrochemical supercapacitive measurements of the MoS @CNT/RGO electrode show a high specific capacitance of 129 mF cm at 0.1 mA cm . The symmetric supercapacitor devices based on the as-obtained composites exhibit a long lifetime (94.7 % capacitance retention after 10 000 cycles), and a high electrochemical performance (29.7 mF cm ). The present experimental findings will lead to scalable, binder-free synthesis of MoS @CNT/RGO hybrid electrodes, with enhanced, flexible, supercapacitive performance, in portable and wearable energy storage devices.

High‐Energy Density Li‐Ion Capacitor with Layered SnS2/Reduced Graphene Oxide Anode and BCN Nanosheet Cathode

“…X‐ray diffraction (XRD) characterization was used to further confirm the crystallinity and phase identification of samples SnS 2 , RGO, and SnS 2 /RGO. As can be found in Figure 3 a, the RGO displays diffraction peaks of 2θ = 26.8° and 42.3° . The XRD patterns of SnS 2 /RGO and SnS 2 are well indexed to hexagonal phase (JCPDS card no.…”

“…The charge transfer resistance (45 Ω) of SnS 2 /RGO is lower than that of the SnS 2 electrode (80 Ω) but higher than RGO (30 Ω), indicating the high conductivity and superior charge transfer afforded by the SnS 2 /RGO composite . Considering the low‐frequency region, the reduced resistance could be owned to the conductive RGO framework and strong binding between SnS 2 and RGO …”

Transition‐Metal Oxynitride: A Facile Strategy for Improving Electrochemical Capacitor Storage

“…Moreover, all electrodes have small and negligible Rs values. The slanted line in the low‐frequency region corresponds to Warburg impedance, which is related to the transfer of ions from the electrolyte to the electrode surface . Among the samples, CoON has the largest slope, which is indicative of the lowest Warburg impedance.…”

Molybdenum Disulphide Heterointerfaces as Potential Materials for Solar Cells, Energy Storage, and Hydrogen Evolution

“…The CNTs were also explored to create nanocomposites with MoS 2 as electrocapacitor electrode material. The 3D network of MoS 2 /CNT/r‐GO was formed to use as a binder‐free electrode, a moderate electrochemical performance has been observed . Microcapacitors are created by a simple spin coating of successive layers of MoS 2 /r‐GO and CNTs, followed by pyrolysis, using the photo‐masking technique.…”