Murata Manufacturing Co., Ltd.

Kouichi Tanaka

Masanori Endo

Kouichi Watanabe

Hiroyuki Mukouyama

One method of manufacturing a polarizable electrode for an electric double-layer capacitor includes, in order, the steps of: preforming a kneaded substance of fine carbon powder, a polymer resin containing fluorine, and a liquid lubricant into a sheet-type preform; adjusting the content of the liquid lubricant in the sheet-type preform to 10 to 47 percent by weight; shaping the preform into a prescribed thickness, optionally but advantageously with heated rolls; and then substantially removing the liquid lubricant from the preform. In another disclosed method, first the liquid lubricant is substantially removed, and then the sheet-type preform is rolled with rollers that are heated to substantially 90.degree.-120.degree. C. In either of the above methods, the rollers are controlled to have a circumferential speed of 0.7-5 m/min and the rollers shape the preform into a sheet substantially 0.04 to 0.5 mm in thickness for serving as a polarizable electrode.

Growing community of inventors

Kyoto, Japan

Kouichi Tanaka