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
Low-temperature solution-processable Ni(OH)2 ultrathin nanosheet/N-graphene nanohybrids for high-performance supercapacitor electrodes
Haixin Chang,Haixin Chang,Jianli Kang,Jianli Kang,Luyang Chen,Jun-Qiang Wang,Kazuyo Ohmura,Na Chen,Takeshi Fujita,Hongkai Wu,Hongkai Wu,Mingwei Chen +11 more
TL;DR: This low-temperature method may provide a low-cost, solution-processable and easily scalable route to high-performance graphene nanohybrid electrodes for energy applications.
Journal ArticleDOI
Carbon alternative pseudocapacitive V2O5 nanobricks and δ-MnO2 nanoflakes @ α‐MnO2 nanowires hetero-phase for high-energy pseudocapacitor
TL;DR: In this article, the pseudocapacitive α-MnO2 nanoflakes and V2O5 nanobricks (NBs) were used to construct an asymmetric supercapacitor.
Journal ArticleDOI
Electrochemical fabrication of a porous network MnO2/poly(5-cyanoindole) composite and its capacitance performance
TL;DR: In this paper, a porous network MnO 2 poly(5-cyanoindole) composite (MnO 2 /PCIn) was prepared by a two-step electrochemical method.
Journal ArticleDOI
Tungsten doping effect on V2O5 thin film electrochromic performance
Marianthi Panagopoulou,Dimitra Vernardou,Emmanuel Koudoumas,Dimitris Tsoukalas,Yannis S. Raptis +4 more
TL;DR: In this article, the structural, morphological, optical and electrochromic properties of W-doped V2O5 thin films have been studied and the increase of the doping content induces an amorphization of the films, which contributes to an enhanced cycling performance.
References
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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.