Journal ArticleDOI
Vanadium Oxide Nanowire–Carbon Nanotube Binder‐Free Flexible Electrodes for Supercapacitors
Sanjaya D. Perera,Bijal B. Patel,Nour Nijem,Katy Roodenko,Oliver Seitz,John P. Ferraris,Yves J. Chabal,Kenneth J. Balkus +7 more
TLDR
In this paper, the authors developed a simple method for preparing freestanding carbon nanotube (CNT)-V2O5 nanowire (VNW) composite paper electrodes without using binders.Abstract:
Vanadium pentoxide (V2O5) layered nanostructures are known to have very stable crystal structures and high faradaic activity. The low electronic conductivity of V2O5 greatly limits the application of vanadium oxide as electrode materials and requires combining with conducting materials using binders. It is well known that the organic binders can degrade the overall performance of electrode materials and need carefully controlled compositions. In this study, we develop a simple method for preparing freestanding carbon nanotube (CNT)-V2O5 nanowire (VNW) composite paper electrodes without using binders. Coin cell type (CR2032) supercapacitors are assembled using the nanocomposite paper electrode as the anode and high surface area carbon fiber electrode (Spectracarb 2225) as the cathode. The supercapacitor with CNT-VNW composite paper electrode exhibits a power density of 5.26 kW Kg−1 and an energy density of 46.3 Wh Kg−1. (Li)VNWs and CNT composite paper electrodes can be fabricated in similar manner and show improved overall performance with a power density of 8.32 kW Kg−1 and an energy density of 65.9 Wh Kg−1. The power and energy density values suggest that such flexible hybrid nanocomposite paper electrodes may be useful for high performance electrochemical supercapacitors.read more
Citations
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Journal ArticleDOI
Flexible solid-state supercapacitors: design, fabrication and applications
TL;DR: Flexible solid-state supercapacitors (SCs) have attracted increasing interest because they can provide substantially higher specific/volumetric energy density compared to conventional capacitors.
Journal ArticleDOI
Review of supercapacitors: Materials and devices
TL;DR: In this paper, a concise description of technologies and working principles of different materials utilized for supercapacitors has been provided, where the main focus has been on materials like carbon-based nanomaterials, metal oxides, conducting polymers and their nanocomposites along with some novel materials like metal-organic frameworks, MXenes, metal nitrides, covalent organic frameworks and black phosphorus.
Journal ArticleDOI
Two dimensional nanomaterials for flexible supercapacitors.
TL;DR: This review article surveys the evolution of electrode materials, recent developments in 2D nanomaterials and their hybrid nanostructures with regulated electrical properties, and the new planar configurations of flexible supercapacitors.
Journal ArticleDOI
Core–Shell Structure of Polypyrrole Grown on V2O5 Nanoribbon as High Performance Anode Material for Supercapacitors
TL;DR: In this article, the authors proposed pseudocapacitive transition-metal oxides and electronically conducting polymers based on faradic redox charge storage to achieve higher energy density than those of electrochemical double layer capacitive carbon materials.
Journal ArticleDOI
Hydrous Ruthenium Oxide Nanoparticles Anchored to Graphene and Carbon Nanotube Hybrid Foam for Supercapacitors
Wei Wang,Shirui Guo,Ilkeun Lee,Kazi Ahmed,Jiebin Zhong,Zachary Favors,Francisco Zaera,Mihrimah Ozkan,Cengiz S. Ozkan +8 more
TL;DR: A simple and scalable way of preparing a three-dimensional (3D) sub-5 nm hydrous ruthenium oxide (RuO2) anchored graphene and CNT hybrid foam (RGM) architecture for high-performance supercapacitor electrodes is reported.
References
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Journal ArticleDOI
Energy and power performance of electrochemical double-layer capacitors based on molybdenum carbide derived carbon
TL;DR: In this paper, cyclic voltammetry, constant current charge/discharge, and electrochemical impedance spectroscopy have been applied to establish the electrochemical characteristics for electric double-layer capacitor (EDLC) consisting of the 1M (C2H5)3CH3NBF4 electrolyte in acetonitrile and micro/mesoporous carbon electrodes prepared from Mo2C, noted as C(Mo2C).
Journal ArticleDOI
Direct formation of single crystal VO2(R) nanorods by one-step hydrothermal treatment
TL;DR: In this paper, pure phase VO 2 (R) nanorods were directly synthesized via the reduction of V 2 O 5 by oxalic acid during one-step hydrothermal treatment.
Journal ArticleDOI
Effect of manganese doping on Li-ion intercalation properties of V2O5 films
Danmei Yu,Danmei Yu,S. T. Zhang,S. T. Zhang,Dawei Liu,Xing-Hua Zhou,S. H. Xie,S. H. Xie,Qifeng Zhang,Yuanming Liu,Guozhong Cao +10 more
TL;DR: Mn-doped vanadium oxide sol was obtained and the films were fabricated by dip-coating, drying at ambient, and then annealing at 250 °C in air for 3 h as mentioned in this paper.
Journal ArticleDOI
Lithium insertion into vanadium oxide nanotubes : Electrochemical and structural aspects
TL;DR: In this paper, the electrochemical and structural aspects of lithium insertion into vanadium oxide nanotubes have been studied and two separate processes were identified: a fast decrease of the interlayer distance followed by a slow two-dimensional relaxation of the intralayer vanadium dioxide structure.
Journal ArticleDOI
Reduced Surfactant Uptake in Three Dimensional Assemblies of VOx Nanotubes Improves Reversible Li+ Intercalation and Charge Capacity
Colm O'Dwyer,Vladimir Lavayen,Vladimir Lavayen,David A. Tanner,Simon B. Newcomb,Eglantina Benavente,Guillermo González,Clivia M. Sotomayor Torres +7 more
TL;DR: In this paper, the authors presented a grant from the Science Foundation Ireland (02/IN.1/I172); European Commission (FP6/2003/IST/2-511616); Universidad de Chile and Fondo Nacional de Desarrollo Cientifico y Tecnologico, Chile (Grants 1050344, 1030102, 7050081, and 1050788).