Patent ID: 7507435

Claim:
An electrode production method comprising: an active-material-containing layer forming step of applying an electrode-forming coating solution containing an electrode active material, a binder capable of binding the electrode active material, and a liquid capable of dissolving or dispersing the binder, onto a collector sheet, and thereafter removing the liquid to form an active-material-containing layer on the collector, thereby obtaining an electrode sheet; and an electrode forming step of cutting the electrode sheet with a slitter apparatus to obtain an electrode, the slitter apparatus comprising: a rotary shaft provided with one or more circular upper blades at a predetermined interval, and a rotary shaft provided with one or more circular lower blades at a predetermined interval, the rotary shafts being arranged in parallel with each other and at such a spacing as to achieve a predetermined engagement depth with contact between a side face of a peripheral part of the upper blades and a side face of a peripheral part of the lower blades, wherein a thickness of the upper blades is not less than 1 mm, wherein an included angle of the upper blades is in a range of 75 to 88°, wherein hardnesses of the upper blades and the lower blades are in a range of 6.9×10 3 to 8.8×10 3 N/mm 2 , and a difference between the hardness of the upper blades and the hardness of the lower blades is not more than 4.9×10 2 N/mm 2 , and wherein surface roughnesses of the upper blades and the lower blades are not more than 4 μm, and a difference between the surface roughness of the upper blades and the surface roughness of the lower blades is not more than 2 μm.