Fabrication of high-performance symmetrical coin cell supercapacitors by using one step and green synthesis sulfur doped graphene powders

Abstract

In this work, symmetrical supercapacitors in the form of coin cell types were produced by using S-doped graphene powders. Sulfur doped graphene powders were prepared by cyclic voltammetry in different...

One‐stepsynthesis of nitrogen‐doped graphene powders and application of them ashigh‐performancesymmetrical coin cell supercapacitors in different aqueous electrolyte

“…In other words, after the fourth hour, colloidal stability was achieved at neutral and basic pH values. The zeta potential measurements at different pH values led to a better understanding of the surface charge behavior of nitrogen‐containing oxygenated functional group‐doped graphene powder in aqueous solution environments 22 . Based on these results, the supercapacitor performance of N‐doped graphene powder can be investigated and improved by using it as an electrolyte in basic solutions in future studies, to contribute to the literature, since the surface charge of N‐doped graphene is better exposed in the basic medium.…”

“…20 Supercapacitors, another energy storage system, have a long charge-discharge cycle life and their power density is higher than that of batteries. 21,22 There is a general and fundamental difference between the working mechanisms of electrochemical capacitors and battery systems; for the double-layer capacitor type, the charge storage process is not Faradaic, that is, ideally no electron transfer occurs at the electrode interface and the storage of electrical charge and energy is electrostatic. 23,24 The use of supercapacitors with batteries in hybrid systems could be possible in many areas as the superior aspects of both systems are combined.…”

An ultrahigh‐energy density and wide potential window aqueous electrolyte supercapacitor built by polypyrrole/aniline 2‐sulfonic acid modified carbon felt electrode

“…Furthermore, the energy density (E) and the power density (P) can be calculated using the following Equations () and (), respectively 6,15‐42 : …”

“…Based on the energy charge technique, conducting polymers, transition metal oxides and carbon have been studied as electrode materials for supercapacitors 5‐8 . Pseudo‐capacitor electrodes are mainly composed of metal oxides such as TiO 2 , 9 MnO 2 , 10 Co 3 O 4 , 11 RuO 2 , 12 WO 3 , 13 V 2 O 5 , 14 Fe 3 O 4 , 15 NiO, 16 mixed metal compounds and graphite materials with high specific capacitance and good conductivity 17‐19 . Apart from these, conducting polymers and their composites are good charge storages for supercapacitors.…”

Production of chlorine-containing functional group doped graphene powders using Yucel's method as anode materials for Li-ion batteries

“…In this context, the research on systems that store energy in chemical forms, such as rechargeable batteries (lead-acid batteries, redox ow batteries, lithium (Li)-ion batteries) and supercapacitors, has continues at an incredible pace. [4][5][6][7][8][9][10][11][12] Since lithium is the lightest metal, it is an extremely suitable candidate for use in rechargeable battery applications. This metal has been extensively researched for nearly half a century, and different Li-ion batteries with positive or negative electrodes consisting of lithium or lithium-containing compounds have been synthesized.…”