Polarizable electrode for electric double-layer capacitor, and electric double-layer capacitor using polarizable electrode

摘要

The present invention provides; (1) a polarizable electrode for an electric double-layer capacitor, which includes a solid activated carbon obtained by pyrolyzing a mixture mainly containing an activated carbon and a thermosetting resin and which has, on the surface and/or inside, holes free from the solid activated carbon, and holes having a diameter of 5 mu m-70 mu m possessing a capacity of 0.01 cc/g-1.0 cc/g; (2) a process for producing the above polarizable electrode for an electric double-layer capacitor, which includes heat-treating, as necessary, a mixture mainly containing an activated carbon, a thermosetting resin and a fiber capable of vaporizing upon heating and then pyrolyzing the resulting materiall and (3) an electric double-layer capacitor including at least a pair of the above polarizable electrodes for an electric double-layer capacitor and an electroyte impregnated between the polarizable electrodes. The above polarizable electrode for an electric double-layer capacitor is free from the drawbacks of conventoinal polarizable electrodes, has a low internal resistance and can be charged with or can discharge a large electric current of several amperes to several hundreds of amperes momentarily.