scholarly journals Flexible Graphene/Carbon Nanotube Electrochemical Double‐Layer Capacitors with Ultrahigh Areal Performance

ChemPlusChem ◽  
2019 ◽  
Vol 84 (7) ◽  
pp. 882-892 ◽  
Author(s):  
Valentino Romano ◽  
Beatriz Martín‐García ◽  
Sebastiano Bellani ◽  
Luigi Marasco ◽  
Jaya Kumar Panda ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Double Layer ◽  
Electrochemical Double Layer Capacitors ◽  
Electrochemical Double Layer ◽  
Double Layer Capacitors

Defect Engineered Multi-Walled Carbon Nanotube arrays as Electrochemical Double Layer Capacitors

2013 ◽  
Vol 1542 ◽  
Author(s):  
Rajaram Narayanan ◽  
Mark Hoefer ◽  
Prabhakar R. Bandaru
Keyword(s):  
Carbon Nanotube ◽  
Double Layer ◽  
Electrochemical Impedance ◽  
Electrochemical Techniques ◽  
Argon Plasma ◽  
Plasma Irradiation ◽  
Multi Walled Carbon Nanotube ◽  
Electrochemical Double Layer Capacitors ◽  
Electrochemical Double Layer ◽  
Double Layer Capacitors

ABSTRACTThe efficacy of vertically aligned defect engineered multi-walled carbon nanotube (MWCNT) arrays as electrochemical double layer capacitors (EDLCs) was investigated using standard electrochemical techniques such as cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). We report a ∼ 200% improvement in specific double layer capacitance of MWCNT arrays by extrinsically introducing defects using argon plasma irradiation. The capacitance-voltage characteristics of argon irradiated MWCNTs provide insights into the nature of the defects and their influence on the specific capacitance (capacitance/area).

Some Aspects of Preparations and Applications of Electrochemical Double‐Layer Capacitors (Supercapacitors)

2021 ◽  
pp. 53-77
Author(s):  
Aleksandr E. Kolosov ◽  
Volodymyr Y. Izotov ◽  
Elena P. Kolosova ◽  
Volodymyr V. Vanin ◽  
Anish Khan
Keyword(s):  
Double Layer ◽  
Electrochemical Double Layer Capacitors ◽  
Electrochemical Double Layer ◽  
Double Layer Capacitors

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.

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