Production process of active carbon used for electrode for organic solvent type electric double layer capacitor
First Claim
1. A process for producing active carbon suitable for use in an electrode of an organic solvent-containing electric double layer capacitor, the process comprising(a) carbonizing an organic substance, to produce a carbonized product;
- (b) combining the carbonized product with an activator comprising an alkali metal hydroxide, to produce an activatable product; and
(c) (1) subjecting the activatable product to a first activation treatment by heating the activatable product to a first temperature between 600°
C. and 950°
C., and(2) subjecting the activatable product to a second activation treatment by heating the activatable product to a second temperature, wherein the second temperature is higher than the first temperature,wherein the second activation treatment is conducted subsequent to the first activation treatment, or vice versa.
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Abstract
Disclosed herein is a process for producing active carbon suitable for use in electrodes for an organic solvent type electric double layer capacitor, comprising calcining an easily graphitizable organic substance and then subjecting the resultant carbonized product to an alkali activation treatment, wherein the alkali activation treatment comprises a first alkali activation treatment at a temperature within a first range and a second alkali activation treatment at a temperature within a second range, said temperature within the second range being higher than that of the first activation treatment, and one of both alkali activation treatments is performed after the other alkali activation treatment.
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Citations
12 Claims
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1. A process for producing active carbon suitable for use in an electrode of an organic solvent-containing electric double layer capacitor, the process comprising
(a) carbonizing an organic substance, to produce a carbonized product; -
(b) combining the carbonized product with an activator comprising an alkali metal hydroxide, to produce an activatable product; and (c) (1) subjecting the activatable product to a first activation treatment by heating the activatable product to a first temperature between 600°
C. and 950°
C., and(2) subjecting the activatable product to a second activation treatment by heating the activatable product to a second temperature, wherein the second temperature is higher than the first temperature, wherein the second activation treatment is conducted subsequent to the first activation treatment, or vice versa. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification