Enhanced electrochemical performance of cobalt oxide nanocube intercalated reduced graphene oxide for supercapacitor application

Abstract

We investigated different molar concentrations of cobalt precursor intercalated reduced graphene oxide (rGO) as possible electrode materials for supercapacitors.

Electrodeposited Nanostructured CoFe2O4 for Overall Water Splitting and Supercapacitor Applications

“…However, the lower activity of carbon-based materials, the inferior electronic conductivity of transition metal oxides, and the poor stability of transition metal sulfides limit their applicability for future energy devices [14,[19][20][21]. Transition metal-based systems including oxides, hydroxides, or sulfides of cobalt and iron have been studied in the past few years for energy conversion or storage applications [22][23][24][25][26][27]. However, these materials show limited electrochemical performance.…”

Enhanced pseudocapacitive energy storage properties of Nb 2 O 5 /C core‐shell structures with the surface modification

“…Carbon is commonly used in nanostructured pseudocapacitor materials to enhance the electrical conductivity of the electrodes. Among the various types of nanocomposites reported on, oxides/carbon nanotube (CNT) and oxides/graphene are the most well studied class of pseudocapacitive systems, and those nanocomposites achieved higher rate capability and/or capacity retention than bare oxides . Note that the remarkable pseudocapacitive performance of the composites is not only from the increased conductivity of electrode but also the greater contact area between electrochemically active materials (oxides) and the electrolyte by dispersion of oxides onto CNT or graphene.…”

“…Among the various types of nanocomposites reported on, oxides/carbon nanotube (CNT) and oxides/graphene are the most well studied class of pseudocapacitive systems, and those nanocomposites achieved higher rate capability and/or capacity retention than bare oxides. 15,[21][22][23][24] Note that the remarkable pseudocapacitive performance of the composites is not only from the increased conductivity of electrode but also the greater contact area between electrochemically active materials (oxides) and the electrolyte by dispersion of oxides onto CNT or graphene. This enhancement is consistent with the mechanism for pseudocapacitance, which occurs near and on the surface of the active material.…”

Synthesis and Characterization of Sol-Gel Derived Bivo4 Nanoparticles for Electrochemical Applications

“…With the energy storage devices, supercapacitors [SCs] are considered one of the majority promising device due to their specific power being as high as conservative capacitors and a specific energy close to that of batteries, as well as their other advantages : eco-friendly and comparatively low cost [2]. Among the numerous supercapacitor based electrodes, pseudocapacitive based transition-metal oxides or inorganic compounds showed large energy density due to faradic redox charge storage mechanism, which has higher energy density compared to the electrochemical double-Layer capacitive carbon materials [3,4]. In pseudocapacitors, the electrochemical charge storage is done by Faradic redox reactions.…”