Novel Quaternary Chalcogenide/Reduced Graphene Oxide-Based Asymmetric Supercapacitor with High Energy Density

Abstract

In this work we have synthesized quaternary chalcogenide CuNiSnS (QC) nanoparticles grown in situ on 2D reduced graphene oxide (rGO) for application as anode material of solid-state asymmetric supercapacitors (ASCs). Thorough characterization of the synthesized composite validates the proper phase, stoichiometry, and morphology. Detailed electrochemical study of the electrode materials and ASCs has been performed. The as-fabricated device delivers an exceptionally high areal capacitance (655.1 mF cm), which is much superior to that of commercial micro-supercapacitors. Furthermore, a remarkable volumetric capacitance of 16.38 F cm is obtained at a current density of 5 mA cm combined with a very high energy density of 5.68 mW h cm, which is comparable to that of commercially available lithium thin film batteries. The device retains 89.2% of the initial capacitance after running for 2000 cycles, suggesting its long-term capability. Consequently, the enhanced areal and volumetric capacitances combined with decent cycle stability and impressive energy density endow the uniquely decorated QC/rGO composite material as a promising candidate in the arena of energy storage devices. Moreover, CuNiSnS being a narrow band gap photovoltaic material, this work offers a novel protocol for the development of self-charging supercapacitors in the days to come.

Sustainable Energy System Utilizing High‐Voltage‐Stable and Energy‐dense Supercapacitors Based on Porous Fe2O3@Graphene Electrode in Ionic Liquid Electrolyte

“…Energy storage is a vital link in energy system, which offers effective solution to storing and using renewable sources, such as solar and wind energy . Among energy storage devices, supercapacitors (SCs) has been considered as one of the most promising candidates, relying on their fast charging‐discharging capability, simple assembly process, security and reliability . However, most of SCs have a clear limitation to achieving high energy density due to the narrow working voltages (<1.2 V) of used aqueous electrolytes.…”

CuMnO2-reduced graphene oxide nanocomposite as a free-standing electrode for high-performance supercapacitors

“…The capacitance preservation at 50 mV s -1 of the CuMnO 2 /NF and CuMnO 2 -rGO/NF electrodes were 60% and 67% of that at 5 mV s -1 , respectively. Besides, the positions of the redox peaks showed a slight shift upon increasing the scan rate owing to diffusion polarization effect [45], while these CV curves maintain a similar shape, indicating the considerable kinetic reversibility and rate capability of the composite.…”

Two‐dimensional materials and synthesis, energy storage, utilization, and conversion applications of two‐dimensional MXene materials

“…The maximum consultant power garage structures are supercapacitors and secondary batteries. Supercapacitors have big energy densities and speedy charge‐discharge rates those have enabled cellular applications, which include energy source for the electric car industry 86 . The call for carbon emission suppression has brought on the cutting‐edge hobby in hybrid‐powered automobiles, which can be occupying a growing percentage of the market.…”