Carbonaceous material, and electrode material for electric double layer capacitor, electrode for electric double layer capacitor and electric double layer capacitor that contain carbonaceous material

2:

• The carbonaceous material of claim 1, which is derived from a plant.

3:

• The carbonaceous material of claim 1, which has a potassium content of 1,000 ppm or less.

4:

• The carbonaceous material of claim 1, which has an iron content of 200 ppm or less.

5:

• The carbonaceous material of claim 1, which has a hydrogen content of 0.47 wt % or less.

6:

• A method for producing the carbonaceous material of claim 1, the method comprising:
• heat-treating a plant-derived activated carbon at 500 to 1,250° C. in an inert gas atmosphere comprising a halogen compound, to obtain the carbonaceous material,
• wherein the plant-derived activated carbon has an average particle diameter of 100 to 10,000 μm, and a specific surface area of 900 to 2,000 m2/g according to a BET method.

7:

• An electrode material, comprising the carbonaceous material of claim 1.

8:

• An electrode, comprising the electrode material of claim 7.

9:

• An electric double layer capacitor, comprising the electrode of claim 8.