Wv. Childs et Gl. Bauer, IMPROVEMENTS IN FLUORINE GENERATION - AMORPHOUS-CARBON ANODES WITH VERTICAL CHANNELS, Journal of the Electrochemical Society, 142(7), 1995, pp. 2286-2290
We describe improvements that have allowed us to operate fluorine cell
s with YBD(T) amorphous carbon anodes for over 2000 h and at current d
ensities over 200 mA . cm(-2) practically free of polarization. Vertic
al channels, 0.2 mm wide and 2 mm deep, facilitate the movement of flu
orine up the face of the anode to the electrolyte surface where it esc
apes into the vapor space. One anode was operated at 226 mA . cm(-2),
it polarized at 100 h, was subjected to a high voltage treatment, and
then ran for over 2000 h without polarizing. Another anode ran well at
338 mA . cm(-2). Current efficiency estimates for hydrogen generation
and for fluorine generation were near 100%.