Process for producing activated carbon material, and electric double layer capacitor employing the same
AssigneesAsahi Glass Company, Limited, ADCHEMCO Corporation
InventorsYasuo Shinozaki, Kazuya Hiratsuka, Toshiharu Nonaka, Kazuyuki Murakami
Life of this patent
Estimating the term…
Abstract
An activated carbon for an electric double layer capacitor electrode, which comprises a stacking structure having 2 layers or less of in a proportion stacking of from 25 to 80% and a stacking structure having 5 layers or more in a proportion of from 2 to 30% in the distribution of a stacking structure as obtained by analysis of the X-ray diffraction pattern of (002) plane, and which has a specific surface area of from 500 to 2,800 m2/g and a total pore volume of from 0.5 to 1.8 cm3/g.
Claims16
A process for producing an activated carbon for an electric double layer capacitor electrode, which comprises:
- (1) a step of mixing a carbon source which forms a non-graphitizable carbon by heating and a carbon source which forms a graphitizable carbon by heating;
- (2) a step of carbonizing the resulting mixture by means of heating;
- and (3) a step of activating the carbonized material, the obtained an activated carbon comprising a stacking structure having at most 2 layers in a proportion of from 25 to 80% and a stacking structure having at least 5 layers in a proportion of from 2 to 30% in the distribution of a stacking structure as obtained by analysis of the X-ray diffraction pattern of (002) plane, and having a specific surface area of from 500 to 2,800 m2/g and having a total pore volume of from 0.5 to 1.8 cm3/g.
A process for producing electric double layer capacitor comprising electrodes containing an activated carbon and an organic type electrolytic solution, said activated carbon being produced by (1) a step of mixing a carbon source which forms a non-graphitizable carbon by heating and a carbon source which forms a graphitizable carbon by heating;
- (2) a step of carbonizing the resulting mixture lay means of heating;
- and (3) a step of activating the carbonized material, and the activated carbon comprising a stacking structure having 2 layers or less in a proportion of from 25 to 80% and a stacking structure having 5 layers or more in a proportion of from 2 to 30% in the distribution of a stacking structure as obtained by analysis of the X-ray diffraction pattern of (002) plane, and having a specific surface area of from 500 to 2,800 m2/g and a total pore volume of from 0.5 to 1.8 cm3/g.
Dependencies are inferred from the claim text.