Current collector for molten salt battery, process for producing material for said current collector, and molten salt battery using current collector

摘要

A current collector for a molten salt battery using liquid sodium as an anode active material, which current collector has excellent electrolyte resistance and low electrical resistance and is able to be produced simply and rapidly at a low cost, and comprises a current collector material in which a carbon composite material obtained by calcining a mixture of expanded powder with a thermosetting resin under a non-oxidizing atmosphere is bonded to a porous carbon material having a porosity of 99 to 30% and an average pore diameter of 0.5 mm to 5 µm.;The above current collector is produced by a process comprising bonding a carbon composite material obtained by calcining a mixture of an expanded graphite powder with a thermosetting resin under a non-oxidizing atmosphere, to a porous carbon material having a porosity of 99 to 30% and an average pore diameter of 0.5 mm to 5 µm, or alternatively, bonding a carbon composite material precursor composed of a mixture of an expanded graphite powder with a thermosetting resin, to the above porous carbon material and then calcining the resulting assembly under a non-oxidizing atmosphere.