| abstract |
An object of the present invention is to provide a method for producing a carbon material for a lithium ion capacitor negative electrode having a small average particle diameter, which is obtained by using plant-derived charcoal as a raw material, and sufficiently de-ashing potassium and iron elements, and a lithium ion capacitor negative electrode. Carbonaceous material. The above problem can be solved by a method for producing a carbonaceous material for a lithium ion capacitor negative electrode having an average particle diameter of 3 to 30 μm, which comprises: (1) a plant-derived charcoal having an average particle diameter of 100 to 10000 μm. a gas phase deashing step of heat treatment at 500 ° C to 1250 ° C in an inert gas atmosphere containing a halogen compound; (2) a step of pulverizing the vapor phase dedusted carbonaceous precursor; and (3) The pulverized carbonaceous precursor is calcined at a temperature of less than 1100 ° C in a non-oxidizing gas atmosphere. |