Facile synthesis of MnO2/rGO/Ni composite foam with excellent pseudocapacitive behavior for supercapacitors

MnO2/mont K10 composite for high electrochemical capacitive energy storage

“…Mesoporous MnO 2 with uniform nanorod morphology and mesoporous b-MnO 2 using SBA-15 and KIT-6 as templates [35], graphene [36], graphene/polyaniline composite [37,38], graphene oxide-MnO 2 [39], and MnO 2 -coated carbon nanotubes between graphene sheets [40] have been reported as electrochemical capacitor electrodes. Recently, graphene/MnO 2 [41], MnO 2 /rGO/Ni composite [42], graphene-polyaniline-MnO 2 hybrids [43], honeycomb MnO 2 nanospheres/carbon nanoparticles/graphene composites [44], hierarchical porous activated carbon @MnO 2 core/shell nanocomposite [45], polyaniline@MnO 2 /graphene ternary composites [46], MnO 2 -deposited TiO 2 nanotube arrays [47], molybdenum disulfide/carbon composite [48], cobalt nickel sulphide dendrite/quasispherical nanocomposite [49], graphdiyne nanostructures [50] and nanoarchitectured MoS 2 [51] have also been employed as electrochemical capacitor electrode materials. The excellent electronic conductivity, high stability, and mechanical flexibility of additive materials enable the improved electrochemical and mechanical properties of MnO 2 composite electrodes for electrochemical capacitor.…”

Facile synthesis of three-dimensional graphene networks by magnetron sputtering for supercapacitor electrode

“…In order to further study the mechanism of Graphene/NFs as high-performance electrode of supercapacitor, the EIS measurement were conducted as shown in Figure 5. The impedance plot consisted of a semicircle in the high-to-medium-frequency region arising from the chemical reaction process and followed by a line at the low-frequency region, which was corresponding to ion diffusion in the electrode material [17]. At low frequencies, the straight lines were nearly perpendicular to the real axis for all samples, indicating excellent capacitive behavior [17].…”

“…04-0850) [16]. In addition to this, excluding the diffraction peaks of Ni foam, a new peak (002) centered at 22.8°appeared for Graphene/NF, corresponding to the diffraction of graphene [17]. The diffraction peak of graphene was the blue-shift and weaker comparing to previous works [1,12,13], which revealed a highly disordered re-stacking of sheets [3].The graphene nanosheets had sharp and transparent edges, demonstrated by the TEM image in Figure 1C, which was acquired by deposition of graphene separated from Graphene/NF directly on a TEM grid for imaging.…”

“…The impedance plot consisted of a semicircle in the high-to-medium-frequency region arising from the chemical reaction process and followed by a line at the low-frequency region, which was corresponding to ion diffusion in the electrode material [17]. At low frequencies, the straight lines were nearly perpendicular to the real axis for all samples, indicating excellent capacitive behavior [17]. At high frequency (close to 100 kHz), the equivalent series resistance (ESR) obtained from the first intersection with the real axis was similar to be about 0.1 Ω for all Graphene/NFs.…”

Inserting AgCl@rGO into graphene hydrogel 3D structure: synergy of adsorption and photocatalysis for efficient removal of bisphenol A

“…As a result, as the lm of AgCl and main skeleton structure of composite material, GO played a key role in controlling morphology, space lling, direction, and supporting effect. 29,30 Fig . 3g and h show the SEM images of AgCl@GO treated with different methods.…”