ACTIVATED CARBON, METHOD FOR PRODUCTION THEREOF, POLARIZED ELECTRODE AND ELECTRICAL DOUBLE LAYER CAPACITOR

摘要

An activated carbon which has been produced through an activation treatment of a carbonaceous material and has a total content of alkali metals of 100 ppm or less, or has a total content of heavy metals of 20 ppm or less and a total content of alkali metals of 200 ppm or less. The above activated carbon, when used as a raw material of an electronic device, is less prone to formation of a dendrite and thus to occurrence of a failure such as a short circuit, and is reduced in self-discharge and exhibits good retention in electrostatic capacity.