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
Carbon Nanomaterials for Flexible Energy Storage
Yingwen Cheng,Jie Liu +1 more
TL;DR: In this article, the authors summarized recent progresses toward the development of flexible electrodes based on carbonaceous nanomaterials with particular emphasis on rational electrode design Strategies to assemble flexible electrodes, both with and without inert mechanical supports, are reviewed and compared.
Journal ArticleDOI
SnO2 nanoparticles anchored on vertically aligned graphene with a high rate, high capacity, and long life for lithium storage
TL;DR: In this article, a type of SnO2-graphene composite anode is presented, in which SnO 2 nanoparticles are uniformly anchored on both sides of vertically aligned graphene nanosheets (SnO2VAGN-SnO 2 ).
Journal ArticleDOI
Mesoporous NiCo2O4 nanoneedles@MnO2 nanoparticles grown on nickel foam for electrode used in high-performance supercapacitors
TL;DR: In this article, mesoporous NiCo2O4@MnO2 nanoneedle arrays as electrode materials for supercapacitor grown on a conductive nickel foam were prepared by a facile hydrothermal route.
Journal ArticleDOI
Vertically Aligned Co9S8 Nanotube Arrays onto Graphene Papers as High‐Performance Flexible Electrodes for Supercapacitors
TL;DR: A rational design of flexible architecture with Co9 S8 nanotube arrays grown onto graphene paper (GP) via a facile two-step hydrothermal method is reported, demonstrating that the new nanostructured Co 9 S8 /GPs can be potentially applied in high performance flexible supercapacitors.
Journal ArticleDOI
Metal–Phenolic Carbon Nanocomposites for Robust and Flexible Energy-Storage Devices
Jun Young Oh,Jun Young Oh,Yeonsu Jung,Young Shik Cho,Jaeyoo Choi,Ji Ho Youk,Nina Fechler,Seung Jae Yang,Chong Rae Park +8 more
TL;DR: A flexible supercapacitor based on tannic acid and carbon nanotubes with a unique nanostructure with both high strength and high pseudocapacitance is presented.
References
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Journal ArticleDOI
Materials for electrochemical capacitors
TL;DR: This work has shown that combination of pseudo-capacitive nanomaterials, including oxides, nitrides and polymers, with the latest generation of nanostructured lithium electrodes has brought the energy density of electrochemical capacitors closer to that of batteries.
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Advanced Materials for Energy Storage
TL;DR: This Review introduces several typical energy storage systems, including thermal, mechanical, electromagnetic, hydrogen, and electrochemical energy storage, and the current status of high-performance hydrogen storage materials for on-board applications and electrochemicals for lithium-ion batteries and supercapacitors.
Journal ArticleDOI
Conducting-polymer-based supercapacitor devices and electrodes
TL;DR: In-situ high-resolution transmission electron microscopy (HRTEM) studies of the structural transformations that occur during the synthesis of carbon-coated LiFePO4 and heat treatment to elevated temperatures were conducted in two different electron microscopes as discussed by the authors.
Journal ArticleDOI
Anchoring Hydrous RuO2 on Graphene Sheets for High-Performance Electrochemical Capacitors
TL;DR: In this paper, the authors demonstrate the importance and great potential of graphene-based composites in the development of high-performance energy-storage systems and demonstrate that the combined advantages of GSs and RuO 2 in such a unique structure are that the ROGSC-based supercapacitors exhibit high specifi c capacitance ( ∼ 570 F g − 1 for 38.3 wt% Ru loading), enhanced rate capability, excellent electrochemical stability ( ∼ 97.9% retention after 1000 cycles), and high energy density (20.1 Wh kg − 1 )
Journal ArticleDOI
R&D considerations for the performance and application of electrochemical capacitors
TL;DR: In this article, the development of lower cost carbons appropriate for use in electrochemical capacitors is underway by several speciality carbon suppliers. The goal is to reduce the cost of the carbon to $10-15/kg.