This critical review provides an overview of current research on carbon-based nanostructured materials and their composites for use as supercapacitor electrodes. Particular emphasis has been directed towards basic principles supercapacitors various factors affecting performance. The focus the is detailed discussion regarding performance stability composites. Pseudo-active species, such as, conducting polymer/metal oxide have found to exhibit pseudo-capacitive behavior demonstrate electrical...

Abstract We have demonstrated the influence of evaporation‐induced flow in a single droplet on crystalline microstructure and film morphology an ink‐jet‐printed organic semiconductor, 6,13‐bis((triisopropylsilylethynyl) pentacene (TIPS_PEN), by varying composition solvent mixture. The ringlike deposits induced outward convective droplets randomly oriented structure. addition dichlorobenzene as evaporation control agent results homogeneous due to slow evaporation, but molecular orientation is...

Single-crystalline triisopropylsilylethynyl pentacene (TIPS-PEN) microribbons (see figure) with well-defined facets and unprecedented electrical characteristics, such as a field-effect mobility high 1.4 cm2 V–1 s–1, are fabricated through the self-assembly of individual TIPS-PEN molecules result solvophobic interactions in solution phase adopting preferential well-ordered intermolecular π–π stacking along ribbon axis. Supporting information for this article is available on WWW under...

Abstract A facile two‐step strategy is developed to design the large‐scale synthesis of hierarchical, unique porous architecture ternary metal hydroxide nanowires grown on 3D Ni foam and subsequent effective sulfurization. The hierarchical Zn–Co–S (NWs) arrays are directly employed as an electrode for supercapacitors application. as‐synthesized NWs deliver ultrahigh areal capacity 0.9 mA h cm −2 (specific 366.7 g −1 ) at a current density 3 , with exceptional rate capability (≈227.6 very...

The ternary roles of polyethyleneimine (PEI) as a reducing agent, surface modifier and polymer host have been presented to fabricate reduced graphene oxide (RGO) based composite films with improved gas barrier property. PEI functionalized RGO dispersion is prepared filtered thin brick mortar structure. simultaneous reduction functionalization (GO) by are confirmed Fourier transform infrared spectroscopy, ultraviolet-visible X-ray photoelectron Raman spectroscopy transmission electron...

Abstract Highly flexible supercapacitors (SCs) have great potential in modern electronics such as wearable and portable devices. However, ultralow specific capacity low operating window limit their practical applications. Herein, a new strategy for the fabrication of free‐standing NiMoS NiFeS nanosheets (NSs) high‐performance asymmetric SC (ASC) through hydrothermal subsequent sulfurization technique is reported. The effect Ni 2+ optimized to attain hierarchical NS architectures with...

We report the structure of organic capping layers platinum colloid nanoparticles and their removal by UV−ozone exposure. Sum frequency generation vibrational spectroscopy (SFGVS) studies identify carbon−hydrogen stretching modes on poly(vinylpyrrolidone) (PVP) tetradecyl tributylammonium bromide (TTAB)-capped nanoparticles. found that treatment technique effectively removes layer basis several analytical measurements including SFGVS, X-ray photoelectron spectroscopy, diffuse reflectance...

Ceria (CeO2) nanoparticles were grown on reduced graphene oxide (RGO) via the in situ reduction of (GO) presence cerium nitrate and CTAB, followed by a one step hydrothermal treatment. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible (UV-Vis), Raman (RS), field emission scanning electron microscopy (FE-SEM), transmission (TEM) photoelectron (XPS) employed to characterize samples. The characterization suggests that ammonia-assisted method is facile...

Abstract To meet a fast‐emerging demand, flexible energy storage applications have great interest in the development of highly hierarchical nanoarchitectures. Metal nitrides recently been paid significant as promising electrode material for supercapacitors (SCs) owing to their high electrical conductivity, excellent redox properties, and outstanding mechanical strength. However, poor electrochemical stability seriously limits commercialization possibilities. Herein, novel strategy is...

Abstract Introducing defects and in situ topotactic transformation of the electrocatalysts generating heterostructures mixed‐metal oxides(hydroxides) that are highly active for oxygen evolution reaction (OER) tandem with metals low hydrogen adsorption barrier efficient (HER) is urgently demanded boosting sluggish OER HER kinetics alkaline media. Ascertaining that, metal–organic‐framework‐derived freestanding, defect‐rich, oxidized Fe–Co–O/Co metal@N‐doped carbon (Co@NC) mesoporous nanosheet...

Here we report a simple, efficient, and environmentally friendly approach towards the reduction of graphite oxide using glycine as both chemical functionalizer reducing agent. The could occur under mild conditions as-produced graphene sheets show impressive crystalline behavior admirable aqueous dispersibility without employing any external stabilizing reagents. Formation has been confirmed by Raman spectroscopy transmission electron microscopy. X-Ray photoelectron spectroscopic analysis...