New Methodology of Organic Electrochemical Synthesis - Fundamentals and Applications of Organic Electrochemistry - page 306

7.1.6 Conducting Polymer-based
Capacitors
Conventional aluminium electrolytic capacitors
are composed of an aluminium anode,
aluminium oxide film, electrolytic solution and
an aluminium cathode ( Figure 7.7 ). Aluminium
solid capacitors replace the electrolytic solution
with solid conductive materials such as
β-MnO 2 , organic conductors and conducting
polymers. In contrast to the ionic-conducting
mechanism of electrolytic solutions, solid
capacitors are driven by an electron-conducting
mechanism, and thus conductivity is greatly
improved. Furthermore, the thermal properties
of solid capacitors are superior to those of
conventional ones.