PURPOSE: To make the current collecting electrode crack retardant while to reduce malfunction of cell due to leakage of electrolyte thus to improve the reliability by constructing the current collecting electrode with conductive resin where conductive carbon black is mixed into resin.

CONSTITUTION: In cell structure comprising a diaphragm for separating between the positive and negative electrodes, a pair of reaction electrodes to be arranged at the opposite sides of said diaphragm and a current collecting electrode to be arranged at the outside of said reaction electrode, conductive resin where 100wt% of resin is mixed with 30∼200wt% of conductive carbon black is employed for the current collecting electrode. For example, the current collecting electrode 11 is made by mixing 100wt% of acetylene black 13 into 100wt% of thermally fused polyethylene resin 12 then thermally pressing into sheet of 3mm thick. Thermoplastic or curing resin may be employed but since deformation of current collecting electrode may cause uneven flow of electrolyte in the cell, hard resin having Young's modulus higher than 104N/cm3 is preferable.