| 摘要 |
A phosphorus compound-complexed activated carbon capable of easily realizing an electric double layer capacitor having high capacitance per unit volume and excellent durability is provided. A phosphorus compound-complexed activated carbon for an electric double layer capacitor having a phosphorus atom content of 1,000 ppm or more, and 20,000 ppm or less, a BET specific surface area of 1,600 m2/g or more, and 2,200 m2/g or less, an average pore diameter of 1.7 nm or more, and 2.1 nm or less, and a pore volume of pores having pore diameters within the range of 1.4 nm to 2.0 nm calculated by a Cranston-Inkley method of 0.25 cm3/g or more. This phosphorus compound-complexed activated carbon is produced by kneading an activated carbon and phosphoric acid at 130° C. to 170° C., conducting molding, and after executing a first heating process in which heating is conducted at 100° C. to 230° C., a second heating process in which heating is conducted at 400° C. to 600° C., and a steam treatment process in which heating is conducted in a steam atmosphere at 500° C. to 900° C., conducting heat treatment in an inert gas atmosphere at 800° C. or higher so as to complex a phosphorus compound.
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