bipolarplatte for elektrolyseur the filterpressenbauart

摘要

PCT No. PCT/EP97/02288 Sec. 371 Date Oct. 27, 1998 Sec. 102(e) Date Oct. 27, 1998 PCT Filed May 6, 1997 PCT Pub. No. WO97/42359 PCT Pub. Date Nov. 13, 1997Bipolar plate made of a composite material for use in a filter-press electrolyzer. Said plate comprises a central portion (6) which is electrically conductive and is obtained by heat-pressing of a mixture of graphite or conductive carbon and a thermoplastic polymer powder resistance to corrosion and two terminal portions (7,8) containing the distribution holes (2,3,4,5) for the inlet of the fresh electrolytes and for the outlet of the exhausted electrolytes and electrolysis products. Said terminal portions are integral with the central portion and are obtained during said heat-pressing from a mixture of graphite or conductive carbon and said thermoplastic polymer powder with a ratio between said powders lower than that of the central portion. Said mixture of the terminal portions may further contain also a non-conductive compound powder, in which case the mixture may also be free from graphite or conductive carbon powder.