ACTIVATED CARBON, CARBON STARTING MATERIAL FOR ACTIVATED CARBON, AND PRODUCTION METHOD OF ACTIVATED CARBON AND CARBON STARTING MATERIAL FOR ACTIVATED CARBON

摘要

PROBLEM TO BE SOLVED: To provide activated carbon which is capable of exhibiting sufficiently high electrostatic capacitance even under low temperature conditions when used in an electric double layer capacitor and in a lithium ion capacitor.SOLUTION: Activated carbon for capacitors has a sodium content of 20 ppm or more but less than 4,000 ppm, a phosphorus content of 100 ppm or more but less than 2,000 ppm, an average particle diameter of 1 μm or more but less than 50 μm as measured by a laser scattering particle size distribution measuring instrument, and a BET specific surface area of 1,400 m/g or more but less than 3,300 m/g.SELECTED DRAWING: Figure 1