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
The effect of thermal annealing and laser irradiation on the microstructure of vanadium oxide nanotubes
TL;DR: In this article, the microstructure of vanadium oxide nanotubes (VONTs) have been characterized using FTIR spectroscopy and Raman Spectroscopy, and the temperature effects on the VONTs were studies by changing the laser irradiation power and thermal annealing temperature in air.
Journal ArticleDOI
Growth of V2O5 nanorods from ball-milled powders and their performance in cathodes and anodes of lithium-ion batteries
Alexey M. Glushenkov,Mohd Faiz Hassan,Vladimir I. Stukachev,Zaiping Guo,Hua-Kun Liu,G.G. Kuvshinov,Ying Chen +6 more
TL;DR: In this paper, a two-stage procedure of ball milling and annealing in air represents a prospective method of preparing nanorods of V2O5 with electrochemical properties suitable for the application in lithium-ion batteries.
Journal ArticleDOI
Vanadium-oxide nanotubes: Synthesis and template-related electrochemical properties
TL;DR: In this article, two kinds of mixed-valent-containing vanadium-oxide nanotubes (VOx-NTs) were synthesized and characterized using dodecylamine and hexadecylamine as templates.
Journal ArticleDOI
Electrochemical and kinetic studies of lithium intercalation in composite nanofibers of vanadium oxide/polyaniline
Marcos Malta,Roberto M. Torresi +1 more
TL;DR: In this paper, the synthesis of a hybrid nanocomposite constituted by vanadium oxide/polyaniline (PANI) with an interesting fibrilar morphology was described.
Journal ArticleDOI
XPS study of the Li intercalation process in sol–gel‐produced V2O5 thin film: influence of substrate and film synthesis modification
TL;DR: In this article, the authors examined the process of lithium intercalation in V2O5 thin films deposited onto standard ITO-coated glass substrates, and they showed that a barrier layer is formed at the ITO interface and, therefore, the formation of Li2O is avoided.