Carbon Material for Negative Electrode, Electric Storage Device, and Product Having Mounted Thereon Electric Storage Device

摘要

Mesoporous graphite is used as an active material of a negative electrode (11, 110) constituting a lithium ion secondary battery (10) or a lithium ion capacitor (100). Specifically, the mesoporous graphite has a specific area within the range of 0.01 m 2 /g or more and 5 m 2 /g or less, and the total volume of mesopores is within the range of 0,005 ml/g or more and 1.0 ml/g or less, wherein the volume of mesopores each having a pore diameter of 10 nm or more and 40 nm or less is 25 % or more and 85 % or less of the total volume of mesopores. By this structure, the output characteristic is enhanced.