POROUS, ELECTRICALLY CONDUCTIVE SHEET AND METHOD FOR PRODUCTION THEREOF

摘要

A porous, electrically conductive sheet, which (a) comprises a sheet formed with a number of carbon fibers having an organic substance adhered thereto, (b) has an electrical resistance in the direction of thickness of 50 m OMEGA cm<2> or less, (c) has a maximum diameter for causing fracture of 25 mm or less, and (d) has a compression ratio (the ratio of a thickness of a compressed sheet to that of an original sheet) of 40 % or less. The porous, electrically conductive sheet can be produced by a method comprising (a) a sheet-forming step of scooping a number of carbon fibers being dispersed in a liquid up onto a net to thereby form a carbon fiber sheet, (b) an organic substance adhesion step of rendering an organic substance to adhere to the formed carbon fiber sheet as a binder for carbon fibers, (c) a drying step of drying the sheet having the organic substance adhered thereto, and (d) a pressing step of pressing the dried sheet with a face pressure of 0.49 to 9.8 Mpa and/or of subjecting the sheet to a roll pressing with a clearance of 300 mu ñm or less.