Supercapacitive properties of hydrothermally synthesized sphere like MoS2 nanostructures

Preparation of TiO2/boron-doped diamond/Ta multilayer films and use as electrode materials for supercapacitors

“…The phase information from the impedance spectra can be used to probe the degree of ideality of the capacitor. The phase angle of TiO 2 /BDD/Ta electrode reaches to the maximum of -75° at about 100 Hz, which is close to that (-90°) of an ideal capacitor [4,[37][38], indicating that the electrode exhibits a nearideal capacitive behavior at 100 Hz. However, the phase angle of BDD/Ta electrode shows a clear deviation from that of an ideal capacitor.…”

“…M a n u s c r i p t 4 In recent years, research has focused on TiO 2 nanostructures as active materials for charge-storage devices, because of their semiconducting properties and chemical stabilities [17][18][19]. The results show that unlike carbon materials and other metal oxides, TiO 2 capacitors behave as conventional electrical double-layer capacitors via a non-faradic mechanism, and have very low specific capacitances [20].…”

One-pot synthesis of hierarchically nanostructured Ni3S2 dendrites as active materials for supercapacitors

“…As one of the most promising energy storage devices, supercapacitors, also known as electrochemical capacitors, have attracted intensive research attention recently, due to their ultrahigh power density, fast charging/discharge rate and long lifespan. [18][19][20][21][22][23][24][25][26] Until now, many reports about the synthesis of dendritic structures used as pseudocapacitive have been found, [27,28] because they may supply a large specific surface area and short diffusion path for electrons and ions, benefit for enhancing their electrochemical properties. For example, Jeong et al reported the fabrication of dendritic hydrous ruthenium oxide for supercapacitors, which used as an electrode showed a good capacitance of 809 Fg À1 at 1.5 Ag À1 .…”

Carbon coated nickel sulfide/reduced graphene oxide nanocomposites: facile synthesis and excellent supercapacitor performance

“…As a new type of supercapacitor electrode materials, metal sulfides such as CuS [26,27], NiCo 2 S 4 [28], MoS 2 [29] and CoS [30] have been recently demonstrated to possess high specific capacitance. Especially, the composite of nickel sulfide (Ni 3 S 2 ) particles deposited on carbon nanotubes exhibits a high specific capacitance of 800 F g -1 and good cycling stability at the current density of 3.2 A g -1 [31], demonstrating a big possibility for supercapacitor application.…”