Strategies for Advanced Supercapacitors Based on 2D Transition Metal Dichalcogenides: From Material Design to Device Setup

Abstract

Recently, the development of new materials and devices has become the main research focus in the field of energy. Supercapacitors (SCs) have attracted significant attention due to their high power density, fast charge/discharge rate, and excellent cycling stability. With a lamellar structure, 2D transition metal dichalcogenides (2D TMDs) emerge as electrode materials for SCs. Although many 2D TMDs with excellent energy storage capability have been reported, further optimization of electrode materials and devices is still needed for competitive electrochemical performance. Previous reviews have focused on the performance of 2D TMDs as electrode materials in SCs, especially on their modification. Herein, the effects of element doping, morphology, structure and phase, composite, hybrid configuration, and electrolyte are emphatically discussed on the overall performance of 2D TMDs‐based SCs from the perspective of device optimization. Finally, the opportunities and challenges of 2D TMDs‐based SCs in the field are highlighted, and personal perspectives on methods and ideas for high‐performance energy storage devices are provided.

Binder-Free Defective Bimetallic Metal-Organic Framework Nanostructures with Lattice Distortion as Hybrid Supercapacitor Electrodes

“…= i a b (10) where i is the peak current and v is the scan rate. The value of b was obtained from the slope of the curve.…”

“…7 Because of their special structures, MOFs possess an ultrahigh specific surface area and pores, which supply added sites for Faraday reactions. 8 Currently, MOFs are widely employed as precursors for the construction of porous carbon, 9 metal oxides, 10 or metal oxide derivatives by hightemperature calcination. 11 However, high-temperature calcination damages the framework structure of most MOFs, significantly degrading the electrochemical properties of the final materials due to the decreased availability of active sites for Faraday reactions.…”

“…15 Another common synthetic method is the mixed linker strategy, which involves the direct mixing of two or more organic ligands to be used as precursors. 16 Mondol et al used benzoic acid (BA) as a modifier to successfully prepare defective UIO-67(Zr)-BA (10), which exhibited better crystallinity than conventional UIO-67. 17 The defective sample had a maximal pore volume of 1.09 cm 3 g −1 and superior adsorption capacity for CBZ.…”

Comprehensive Review on Bimetallic (Ni and Co)-Chalcogenides and Phosphides with Three-Dimensional Architecture for Hybrid Supercapacitor Application

“…The values of electrochemical activity and capacity cause variations with morphological characteristics, electronic conductivity, and chemical composition of electrode materials (Table ). Specifically, existing review articles on NiCo-S show these electrode materials have received extensive attention from researchers due to its abundant redox reaction and high specific capacity. , Although the charge storage mechanism in NiCo-S still remains controversial as the electrochemical energy storage shows dependency on both surface and bulk redox activities. The charge storage mechanism and electrochemical performance of NiCo-S show variations with morphology as bulk 3D structure and nano-3D architecture.…”

Effect of coating MoS2 nanoflakes onto CuCo2O4 on the electrochemical performance as electrode materials of supercapacitors

“…[25][26][27] MoS 2 has been widely investigated for applications in energy storage and conversion devices, including lithium-ion batteries, [28][29][30] hydrogen evolution reactions, [31][32][33] and supercapacitors. [34][35][36] For instance, Wang et al 37…”