Niobium pentoxide nanoparticles decorated graphene as electrode material in aqueous-based supercapacitors: Accurate determination of the working voltage window and the analysis of the distributed capacitance in the time domain

Synthesis of highly dispersed Nb2O5–graphene heterojunction composites using ethylene diamine tetraacetic acid and boron-functionalized graphene quantum dots for symmetrical flexible supercapacitors with ultrahigh energy density

“…3B, the I D / I G was found to be 1.49, verifying that the n-Nb 2 O 5 -p-GQD-G contains a large amount of surface defects. 23 The weak Raman peaks correspond to Nb–O in Nb 2 O 5 . 24…”

“…3B, the I D /I G was found to be 1.49, verifying that the n-Nb 2 O 5 -p-GQD-G contains a large amount of surface defects. 23 The weak Raman peaks correspond to Nb-O in Nb 2 O 5 . 24 25 The Nb 3d XPS spectrum could be divided into two peaks at 207.1 and 209.4 eV, corresponding to the Nb 3d 3/2 and Nb 3d 5/2 .…”

Comprehensive Review on Bimetallic (Ni and Co)-Chalcogenides and Phosphides with Three-Dimensional Architecture for Hybrid Supercapacitor Application

“…Whereas intercalation pseudocapacitance is the process of inserting and embedding ions or molecules from an electrolyte between the layers of a host material, which is commonly a TMO or conductive polymer. Some common electrode materials used in redox pseudocapacitors include TMOs like ruthenium oxide (RuO 2 ), manganese oxide (MnO 2 ), nickel oxide (NiO), V 2 O 5 , Fe 3 O 4 , Nb 2 O 5 , Co 3 O 4 , etc. and conducting polymers such as polyaniline (PANI), polypyrrole (PPy), polythiophene (PTh), poly­(vinyl alcohol) (PVA), polyacetylene, poly­(4-styrenesulfonate) (PSS), poly­(3,4-ethylene dioxythiophene) (PEDOT), etc.…”

Three-Dimensional Nb Nanopillar based Electrode for Energy Storage Devices

“…Therefore, it is extremely urgent to develop sustainable and efficient materials for energy storage devices, especially for supercapacitors and lithium-ion batteries (7)(8)(9). Among the materials used in energy devices, Niobium (Nb)-based materials (10)(11)(12) constantly maintain their attractiveness due to their unique crystal structures and high performance. A number of researchers have reported that the kinetics of anodic oxide film growth on the surface of Nb is commonly clarified with the high-field electrical conductivity measurements due to the hopping transmission between charged imperfections (13,14).…”