Graphene homogeneously anchored with Ni(OH)2 nanoparticles as advanced supercapacitor electrodes

NiCo2S4 nanoparticles anchored on reduced graphene oxide sheets: In-situ synthesis and enhanced capacitive performance

“…It is worth noting that the intensity ratio of D band to G band (I D /I G ) of 1.3 for the as-prepared NiCo 2 S 4 /RGO hybrid, which is much higher than that for GO, as depicted in Fig. 1b. An increased I D /I G ratio indicates a decrease in the size of the in-plane sp 2 domains, and the removal of oxygen functional groups in GO sheets [33,40], which indicates that GO was reduced to some extent. Fig.…”

Facile synthesis of amorphous Ni(OH)2 for high-performance supercapacitors via electrochemical assembly in a reverse micelle

“…Metal oxides, especially in the form of nanostructures, have long been considered as potential electrode materials because of the ease of large-scale fabrication and their rich redox reactions involving different ions, which contributes to high specific capacities/capacitances (in general multiple times higher than those of carbon/graphite-based materials) [19][20][21][22][23][24]. Some of transition metal oxides and hydroxides, such as RuO 2 and MnO 2 have been considered to be most promising pseudocapacitive materials while CoO x , NiO, Ni(OH) 2 have been considered to be potential faradaic battery type materials due to their high theoretical specific capacitance [25][26][27][28][29][30][31].…”

A facile hydrothermal reflux synthesis of Ni(OH)2/GF electrode for supercapacitor application

“…Hence, the electrochemical performance of supercapacitors depend on the type of active materials used, e.g. conducting polymers, transition metal oxides and hydroxides, and carbon materials [4,8]. Furthermore, the distinctive dimensions of the active materials are well essential for Electrochemical capacitors performance, considering the fact that the square of the diffusion distance is proportionate to the diffusion time of electrolyte ions [9,10].…”