such salts include alkylimidazolium tetracholoraluminates the use of which for the oxidation and reduction of conductive polymers is described in u s pat nos 4 463 071 and 4 463 072 alkylpyridinium tetrachloroaluminates and mixtures of the above with alkali metal halides a variety of transparent conductors such as sno 2 ino 3 and cd 2 sno 4 and the like can be used for the conductive surface on walls 7 and 11 see fig2 and 3 examples of commercial compositions for such conductors are transparent metal oxides made by deposition technology and sierracin intrex using sputtering techniques involving reactive gases in combination with metal targets leybold heraeus also offers commercially a metal metal oxide coating called tcc 2000 which is sufficiently transparent and conductive for the present application poly phenylene amine electrodes were fabricated by electrochemically oxidizing acidic aqueous solutions of aniline a solution containing 0 5m aniline 0 5m nahso 4 and 0 6m h 2 so 4 was found to be preferred over solutions containing cl or ch 3 so 3 anions in place of hso 4 galvanostatic deposition of the polymeric film on ito conducting glass a glass d coated with an indium tin oxide conductive.