Petal-like NiS-NiO/G-C3N4 Nanocomposite for High-Performance Symmetric Supercapacitor

Abstract

Graphitic carbon nitride (G-C3N4) and NiS-NiO/G-C3N4 nanocomposite have been synthesized via combustion and hydrothermal techniques, respectively. The chemical and morphological properties of these materials were confirmed using different analytical methods. SEM confirms the formation of G-C3N4 sheets containing additional petal-like shapes of NiS-NiO nanoparticles. The electrochemical testing of NiS-NiO/G-C3N4 symmetric supercapacitors is carried out from 0.6 M HCl electrolyte. Such testing includes charge/discharge, cyclic voltammetry, impedance, and supercapacitor stability. The charge/discharge time reaches 790 s at 0.3 A/g, while the cyclic voltammetry curve forms under a high surface area. The produced specific capacitance (CS) and energy density values are 766 F/g and 23.55 W.h.kg−1, correspondingly.

Ag2S-Ag2O-Ag/poly-2-aminobenzene-1-thiol Nanocomposite as a Promising Two-Electrode Symmetric Supercapacitor: Tested in Acidic and Basic Mediums

“…The capacitance retention and the coulomb efficiency (ɳ, using Equation ( 5)) [62] under these different electrolytes are represented in Figure 7c,d, correspondingly. This good stability under an acid medium confirms the conductivity enhancement of the polymer under the effect of H + ions on the prepared polymer materials [13,63]. For additional information, we compared the efficiency of this fabricated supercapacitor with previous studies as mentioned in Table 1.…”

Decoration of Poly-3-methyl Aniline with As(III) Oxide and Hydroxide as an Effective Photoelectrode for Electroanalytical Photon Sensing with Photodiode-like Behavior

“…The bands at 1103 and 869 cm −1 are characteristic of C–H groups. The composite As 2 O 3 –As(OH) 3 /P3MA (red curve) showed similar bands to those of P3MA, but with some red shifts, indicating the interaction with As 2 O 3 –As(OH) 3 [ 27 , 28 , 29 ]. Moreover, a noticeable enhancement was observed in the peak at 3410 cm −1 for O–H groups, alongside the N–H groups of the polymer.…”

Chemical synthesis and super capacitance performance of novel CuO@Cu4O3/rGO/PANI nanocomposite electrode

“…[1][2][3] In general, SCs can be classied into electrical double-layer capacitors (EDLCs), pseudo-capacitors (PCs), and hybrid capacitors (HCs). 4,5 In EDLCs, the charge is stored electrostatically via reversible ion adsorption by forming an electric double layer at the porous carbon electrode-electrolyte interface. In contrast, the PCs store faradaic charges by reversible redox chemical reactions that occur at the surface of the active materials such as conducting polymers (CPs), transition metal hydroxides (MHs), and oxides (MOs).…”