
79Carbon Materials and Their Energy Conversion and Storage Applications
CNTs have also been employed as conductive and expansion ller. Some recent
works have been reviewed by Liu as shown in Table 3.2.
131
3.4 ELECTROCHEMICAL CAPACITORS
Electrochemical capacitors (EC), also called supercapacitor or ultracapacitor, is an
energy storage device with a very high specic power density and relatively low
specic energy storage. EC can be classied in two groups: the electric double-layer
capacitor (EDLC) and the pseudocapacitor.
3.4.1 eleCtriC double-layer CapaCitor
EDLC stores electrical energy in the electrical double-layer (EDL) formed at the ...