Positive electrode for a lithium ion capacitor and lithium ion capacitor

A positive electrode for a lithium ion capacitor, the positive electrode comprising:

• a positive electrode layer (A) which, after a following pretreatment for measurement, has a volume of pores having a pore size of 1.0 nm to 1.4 nm and of 0.11 cc/g or more, the pore size being calculated by a Horvath-Kawazoe (HK) method, and has a total pore volume calculated by a Brunauer-Emmett-Teller (BET) method of 1.1 cc/g or less, wherein
• in the pretreatment for measurement:
• the positive electrode is taken out of a cell having a cell voltage of 3 V, cut out and then immersed in 10 cc (mL) of dehydrated acetonitrile per 1 cm3 of the positive electrode at 25° C. for 10 minutes with stirring;
• this immersion is repeated three times and the positive electrode is subjected to a pre-drying treatment at 60° C. for 1 hour;
• and the positive electrode layer (A) is scraped off from the positive electrode obtained by the pre-drying treatment and dried for 2 hours under conditions of 200° C. and a pressure reduced to 5.5 Pa.