Electrochemical electrical double-layer capacitor EDLC

In recent years there has been increasing interest in the power capacitors, ultracapacitors or supercapacitors based on electrochemical systems. These include electric double layer capacitor (EDLC) types based on carbon electrodes with suitable electrolyte systems, and electrochemical capacitors with pseudocapacitance [34,35],... [Pg.428]

It is most convenient to use Ragone diagrams for the comparison of the main characteristics of electrochemical devices. Figure 30.1 shows a Ragone diagram for diverse commercial electrochemical devices conventional electrolytic capacitors, electrochemical supercapacitors (ECSCs), batteries, and fuel cells (Pandolfo and Hollenkamp, 2006). One should point out that it is mainly electric double-layer capacitors (EDLCs) of all the available ECSC types that are produced at present. [Pg.345]

This chapter describes the fundamentals of different kinds of electrochemical capacitors (ESs), including electrical double-layer capacitors (EDLCs), pseudocapacitors, and hybrid ESs. This serves as a foundation for understanding ES science... [Pg.24]

Pahn et al. [34] employed the CV method to investigate the effect of the concentration of the addition of l-butyl-3-methylimidazolium tetrafluoroborate ([BMIM] [BFJ) in l-ethyl-3-methylimidazolium tetrafluoroborate ([EMIM][BF4]) electrolyte on the electrochemical characteristics for electrical double-layer capacitors (EDLCs). They found the concentration of [BM1M][BF4] has little influence on the... [Pg.286]

Electrical double-layer capacitor (EDLC) Electrochemical capacitor (EC) Simulation of supercapacitors Ultracapacitors... [Pg.2283]

An electric double-layer capacitor, also known as supercapacitor, pseudocapacitor, electric double layer capacitor (EDLC), supercapacitor or ultracapacitor is an electrochemical capacitor with relatively high energy density. Compared to conventional capacitors the energy density is typically on the order of thousands of times greater than an electrolytic capacitor. In comparison with conventional batteries or fuel cells, EDLCs have lower energy density but a much higher power density. [Pg.93]

Strategy for making materials with desired characteristics provides opportunities to substantially improve electrochemical energy conversion. Template-synthesized carbon materials have proved their unique performances in lithium-ion batteries, electrical double-layer capacitors (EDLCs), and fuel cells because of their surface chemistry, pore structure, and electrical conductivity characteristics. [Pg.112]

Activated carbon is a porous carbon material with developed nano-sized pores and a high specific surface area (>1,000 m g ). Nowadays, the technical term nanoporous carbon is very often used to mean activated carbon, but the activated carbon should be strictly defined as a porous carbon prepared by an activation process consisting of a gasification reaction to form the developed nano-sized pore stmcture in the carbon matrix. The activated carbons have been widely utilized as industrial materials, for example, an adsorbent, decolorizing agent, deodorant, and catalyst. The details of the preparation method, pore structure, and applications of activated carbons have been described [1]. The most significant electrochemical application of activated carbons is use as an electrode active material for an electric double-layer capacitor (EDLC). This article reviews the use of activated carbons in an EDLC. [Pg.1]

Electrochemical power sources, rechargeable batteries and supercapacitors (or electrical double-layer capacitor, EDLC), are attractive in the wide range of applications, such as mobile electrical devices, hybrid electric vehicle (HEV), and smart grid. In the past century, considerable research efforts have been done to study the... [Pg.1220]

The role of electrochemical double layer capacitors (EDLCs) in technologies to store electricity is an important [4], but compared to lithium-ion batteries, stiU an underestimated issue. In terms of energy densities, still the Hthium-ion batteries are the better choice ( 100 Whkg vs up to 5 Whkg for EDLCs), but in terms of power densities, the EDLCs are in a much better position and may reach values above 10 000 Wkg"T Another disadvantage of EDLCs might be the faster... [Pg.449]