  Based on the energy conversion of the dynamic electric effect from the
solid/liquid contact double electric layer is the dynamic electromotive
potential, this paper studies the static appearance and the release of the
electric field energy of the solid/liquid contact double electric layer, so a
special capacitor (P/L/N capacitor) of solid conductor P / polar liquid L /
solid conductor N is constructed. The observations based on experiments are as
follows: (i) the contact double electric layer derived from the internal
potential difference polarization of the solid conductor / polar liquid is
equivalent to the external electric field polarization of the ordinary
capacitor. The formation process of the contact double electric layer is the
spontaneous charging process of the P/L/N capacitor, and the P/L/N capacitor
still shows the electric field energy of the contact double electric layer.
(ii) Because the polarized external potential difference of the solid conductor
/ polar liquid contacting the double electric layer is always less than the
internal potential difference, the short-circuit P/L/N capacitor also has a
continuous electromotive force after the discharge, statically releasing the
electric field energy contacting the double electric layer. (iii) The contact
double electric layer of solid conductor / polar liquid is produced
spontaneously caused by mutual contact, and it is also a self-organizing
process of absorbing the environmental heat energy into the electric field
energy of the contact double electric layer. P/L/N capacitors realize
thermoelectric conversion by releasing the electric field energy of the contact
double electric layer. The above-mentioned phenomenon provides the possibility
for the development of self-generated capacitors and self-supplied power
supply.
