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.

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.

Performance of Capacitors Using Organic Electrolytes

1999 ◽  
Vol 575 ◽  
Author(s):  
T. Morimoto ◽  
M. Tsushima ◽  
Y. Che
Keyword(s):  
Activated Carbon ◽  
Energy Density ◽  
Power Density ◽  
Double Layer ◽  
Electric Double Layer ◽  
High Surface ◽  
High Surface Area ◽  
Long Cycle Life ◽  
Double Layer Capacitors ◽  
Electric Double Layer Capacitors

ABSTRACTElectric double-layer capacitors(EDLC) based on charge storage at the interface between a high surface area activated carbon electrode and an electrolyte solution are characterized by their long cycle life and high power density in comparison with batteries. However, energy density of electric double-layer capacitors obtained at present is at most 1Wh/kg at a power density of 600W/kg and smaller compared with that of batteries, which limits the applications of the capacitor. Therefore, new capacitors which show larger energy density than that of electric-double layer capacitors are proposed. The new capacitors are hybrid capacitors consisting of activated carbon cathode, Li-doped graphite anode and an organic electrolyte. Maximum voltage applicable to the cell becomes over 4.OV which is larger than that of the electric double-layer capacitor. As a result, discharged energy density of the cell becomes 4Wh/kg at a power density of 600W/kg.

High surface area and oxygen-enriched activated carbon synthesized from animal cellulose and evaluated in electric double-layer capacitors

RSC Advances ◽  
2015 ◽  
Vol 5 (40) ◽  
pp. 31375-31383 ◽  
Author(s):  
Yuan Gao ◽  
Qinyan Yue ◽  
Baoyu Gao
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Double Layer ◽  
Electric Double Layer ◽  
Activated Carbons ◽  
High Surface ◽  
High Surface Area ◽  
Crab Shell ◽  
Double Layer Capacitors ◽  
Electric Double Layer Capacitors

Mechanism diagram for the synthesis of activated carbons from crab shell wastes.

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