scholarly journals Development of Electric Double Layer Capacitors with a High Energy Density

2001 ◽  
Vol 69 (6) ◽  
pp. 431-433
Author(s):  
Susumu NOMOTO ◽  
Kaneharu YOSHIOKA ◽  
Akihiko YOSHIDA
Keyword(s):  
Energy Density ◽  
Double Layer ◽  
Electric Double Layer ◽  
High Energy ◽  
High Energy Density ◽  
Double Layer Capacitors ◽  
Electric Double Layer Capacitors

Acid-free synthesis of oxygen-enriched electroactive carbon with unique square pores from salted seaweed for robust supercapacitor with attractive energy density

2018 ◽  
Vol 20 (21) ◽  
pp. 4983-4994 ◽  
Author(s):  
Chunfeng Xue ◽  
Lin Feng ◽  
Yanan Hao ◽  
Fujuan Yang ◽  
Qian Zhang ◽  
...  
Keyword(s):  
Energy Density ◽  
Double Layer ◽  
Electric Double Layer ◽  
High Energy ◽  
High Energy Density ◽  
Double Layer Capacitors ◽  
Electric Double Layer Capacitors

Oxygen-enriched electroactive carbon with unique square pores is prepared by carbonizing salted seaweed and shows high energy density in electric double-layer capacitors.

Ion Storage in Nanoconfined Interstices Between Vertically Aligned Nanotubes in Electric Double-Layer Capacitors

2017 ◽  
Vol 15 (1) ◽  
Author(s):  
Aniruddha Dive ◽  
Soumik Banerjee
Keyword(s):  
Double Layer ◽  
Electric Double Layer ◽  
Carbon Nanostructures ◽  
High Energy ◽  
Operating Conditions ◽  
High Energy Density ◽  
Ion Storage ◽  
Vertically Aligned ◽  
Double Layer Capacitors ◽  
Electric Double Layer Capacitors

Ionic liquids are considered promising electrolytes for developing electric double-layer capacitors (EDLCs) with high energy density. To identify optimal operating conditions, we performed molecular dynamics simulations of N-methyl-N-propyl pyrrolidinium bis(trifluoromethanesulfonyl)imide (mppy+ TFSI−) ionic liquid confined in the interstices of vertically aligned carbon nanostructures mimicking the electrode structure. We modeled various surface charge densities as well as varied the distance between nanotubes in the array. Our results indicate that high-density ion storage occurs within the noninteracting double-layer region formed in the nanoconfined domain between charged nanotubes. We determined the specific arrangement of these ions relative to the nanotube surface and related the layered configuration to the molecular structure of the ions. The pitch distance of the nanotube array that enables optimal mppy+ TFSI− storage and enhanced capacitance is determined to be 16 Å.

Electric Double- Layer Capacitor using Organic Electrolyte

1997 ◽  
Vol 496 ◽  
Author(s):  
T. Morimoto ◽  
M. Tsushima ◽  
M. Suhara ◽  
K. Hiratsuka ◽  
Y. Sanada ◽  
...  
Keyword(s):  
Double Layer ◽  
Electric Double Layer ◽  
High Surface ◽  
High Surface Area ◽  
High Energy ◽  
High Energy Density ◽  
Large Power ◽  
Power Sources ◽  
Double Layer Capacitors ◽  
Electric Double Layer Capacitors

ABSTRACTElectric double-layer capacitors based on charge storage at the interface between a high surface area activated carbon electrode and a propylene carbonate solution are widely used as maintenance-free power sources for IC memories and microcomputers. New applications for electric double-layer capacitors have been proposed in recent years. The popularity of these devices is derived from their high energy density compared with conventional capacitors and their long cycle life and high power density relative to batteries.The performance of the capacitor depends not only on the materials used in the cells but also on the construction of the cells. The performance of power capacitors for large power sources as well as materials and construction of these capacitors are described.

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.

Solvent-free synthesis of an ionic liquid integrated ether-abundant polymer as a solid electrolyte for flexible electric double-layer capacitors

2017 ◽  
Vol 5 (37) ◽  
pp. 19703-19713 ◽  
Author(s):  
Ruiqi Na ◽  
Ching-Wen Su ◽  
Yi-Han Su ◽  
Yu-Chun Chen ◽  
Yen-Ming Chen ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Solid Electrolyte ◽  
Double Layer ◽  
Electric Double Layer ◽  
Solid Electrolytes ◽  
High Energy ◽  
Solvent Free ◽  
Double Layer Capacitors ◽  
Solvent Free Synthesis ◽  
Electric Double Layer Capacitors

Capitalizing on ether groups, solvent-free synthesis produces ionic liquid integrated solid electrolytes for flexible capacitors delivering high energy and power.

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