Molybdenum Carbide Derived Carbon Based Electrode Materials for High Energy and Power Density Electrochemical Double-Layer Capacitors

2009 ◽  
Keyword(s):  
Power Density ◽  
Double Layer ◽  
Molybdenum Carbide ◽  
Electrode Materials ◽  
High Energy ◽  
Electrochemical Double Layer Capacitors ◽  
Electrochemical Double Layer ◽  
Double Layer Capacitors ◽  
Carbide Derived Carbon ◽  
Energy And Power Density

scholarly journals High Performance Graphene-Based Electrochemical Double Layer Capacitors Using 1-Butyl-1-methylpyrrolidinium tris (pentafluoroethyl) trifluorophosphate Ionic Liquid as an Electrolyte

Electronics ◽  
2018 ◽  
Vol 7 (10) ◽  
pp. 229 ◽  
Author(s):  
Jacob D. Huffstutler ◽  
Milinda Wasala ◽  
Julianna Richie ◽  
John Barron ◽  
Andrew Winchester ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Energy Density ◽  
Double Layer ◽  
Specific Energy ◽  
High Energy ◽  
High Energy Density ◽  
Electrochemical Double Layer Capacitors ◽  
Electrochemical Double Layer ◽  
High Specific Energy ◽  
Double Layer Capacitors

There are several advantages to developing electrochemical double-layer capacitors (EDLC) or supercapacitors with high specific energy densities, for example, these can be used in applications related to quality power generation, voltage stabilization, and frequency regulation. In this regard, ionic liquids capable of providing a higher voltage window of operations compared to an aqueous and/or polymer electrolyte can significantly enhance the specific energy densities of EDLCs. Here we demonstrate that EDLCs fabricated using ionic liquid 1-butyl-1-methylpyrrolidinium tris (pentafluoroethyl) trifluorophosphate (BMP-FAP) as an electrolyte and few layer liquid-phase exfoliated graphene as electrodes show remarkable performance compared to EDLC devices fabricated with aqueous potassium hydroxide (6M) as well as widely used ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate (BMIM-PF6). We found that graphene EDLC’s with BMP-FAP as an electrolyte possess a high specific energy density of ≈25 Wh/kg along with specific capacitance values as high as 200 F/g and having an operating voltage windows of >5 volts with a rapid charge transfer response. These findings strongly indicate the suitability of BMP-FAP as a good choice of electrolyte for high energy density EDLC devices.

Mesoporous carbon capsules as electrode materials in electrochemical double layer capacitors

2011 ◽  
Vol 13 (7) ◽  
pp. 2652-2655 ◽  
Author(s):  
Shanthi Murali ◽  
Daniel R. Dreyer ◽  
Patricia Valle-Vigón ◽  
Meryl D. Stoller ◽  
Yanwu Zhu ◽  
...  
Keyword(s):  
Double Layer ◽  
Mesoporous Carbon ◽  
Electrode Materials ◽  
Electrochemical Double Layer Capacitors ◽  
Electrochemical Double Layer ◽  
Double Layer Capacitors

scholarly journals Ionic liquids containing tricyanomethanide anions: physicochemical characterisation and performance as electrochemical double-layer capacitor electrolytes

2017 ◽  
Vol 19 (25) ◽  
pp. 16867-16874 ◽  
Author(s):  
Vitor L. Martins ◽  
Anthony J. R. Rennie ◽  
Roberto M. Torresi ◽  
Peter J. Hall
Keyword(s):  
Ionic Liquids ◽  
Double Layer ◽  
High Energy ◽  
Double Layer Capacitor ◽  
Electrochemical Double Layer Capacitors ◽  
Electrochemical Double Layer Capacitor ◽  
Electrochemical Double Layer ◽  
Physicochemical Characterisation ◽  
And Performance ◽  
Double Layer Capacitors

Fluorine free ionic liquids with low density and high ionic conductivity for high energy electrochemical double-layer capacitors.

A Study on Oxidized Glassy Carbon sheets for Bipolar Supercapacitor Electrodes

1999 ◽  
Vol 575 ◽  
Author(s):  
A. Braun ◽  
M. Bärtsch ◽  
F. Geiger ◽  
B. Schnyder ◽  
R. Kötz ◽  
...  
Keyword(s):  
Double Layer ◽  
Glassy Carbon ◽  
Gas Adsorption ◽  
Electrochemical Impedance ◽  
High Energy ◽  
Active Film ◽  
X Ray Scattering ◽  
Electrochemical Double Layer Capacitors ◽  
Electrochemical Double Layer ◽  
Double Layer Capacitors

ABSTRACTElectrochemical Double Layer Capacitors (EDLC) for high energy and power density applications, based on glassy carbon (GO) electrodes, are being developed in our laboratory. In the context of this project, GC sheets were oxidized and investigated with Small Angle X-ray Scattering (SAXS), Electrochemical Impedance Spectroscopy (EIS) and Nitrogen Gas Adsorption (BET). During oxidation an active film with open pores is built on the surface of the GC. Upon oxidation, the internal volumetric surface area of the active film decreases, whereas the volumetric electrochemical double layer capacitance increases. We show that this effect is correlated with the opening, the growth and the coalescence of the pores.

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