Claims
- 1. A vitreous carbon-active carbon composite material consisting of active carbon dispersed in a binder of vitreous carbon, said composite material being obtained by firing a mixture of a polycarbodiimide resin and an active carbon in a non-oxidizing atmosphere at a temperature of 700.degree.-1500.degree. C., whereby said polycarbodiimide resin is converted to said vitreous carbon.
- 2. A vitreous carbon-active carbon composite material according to claim 1, wherein the active carbon is in particulate form.
- 3. A vitreous carbon-active carbon composite material according to claim 2, wherein the active carbon is in powder form.
- 4. A vitreous carbon-active carbon composite material according to claim 2, wherein the active carbon is in the form of fibers.
- 5. A vitreous carbon-active carbon composite material according to claim 2, wherein the active carbon has a specific surface area of at least 500 m.sup.2 /g.
- 6. A vitreous carbon-active carbon composite material according to claim 1, wherein the amount of vitreous carbon in the vitreous carbon-active carbon composite material is 0.5-100 parts by weight per 100 parts by weight of the active carbon.
- 7. In an electric double layer capacitor comprising electrodes and an electrolyte, the improvement wherein an electrode is a vitreous carbon-active carbon composite material consisting of active carbon dispersed in a binder of vitreous carbon, said composite material being obtained by firing a mixture consisting of a polycarbodiimide resin and an active carbon in a non-oxidizing atmosphere at a temperature of 700.degree.-1500.degree. C., whereby said polycarbodiimide resin is converted to said vitreous carbon.
Priority Claims (1)
Number |
Date |
Country |
Kind |
5-145710 |
May 1993 |
JPX |
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Parent Case Info
This application is a continuation of application Ser. No. 08/245,897 filed May 19, 1994, now abandoned.
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4388163 |
Richter et al. |
Jun 1983 |
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4810599 |
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4831011 |
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5152941 |
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5554354 |
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Sep 1996 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
245897 |
May 1994 |
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