Claims
- 1. An activated carbon/polyacene composite containing activated carbon powder or fiber and having a selected molar ratio range of hydrogen atoms [H] to carbon atoms [C] as follows:
- 0.01.ltoreq.[H]/[C].ltoreq.0.2
- wherein the resistivity of the composite is less than 1.4 .OMEGA.-cm under a condition of no compression.
- 2. The activated carbon/polyacene composite according to claim 1, wherein said molar ratio is selected to be from 0.02 to 0.14 and said resistivity thereof is selected to be lower than 0.21 .OMEGA..multidot.cm.
- 3. An electric double-layer capacitor comprising a pair of polarizable electrodes which comprise the activated carbon/polyacene composite of claim 1.
- 4. The electric double-layer capacitor according to claim 3, wherein a capacitance per unit volume is selected to be 7.7 F/cm.sup.3 or more and an equivalent series resistance is selected to be 2.51 cm or less under a condition of no compression.
- 5. The electric double-layer capacitor according to claim 3, wherein said pair of polarizable electrodes are impregnated with an electrolytic solution containing tetraethylammonium tetrafluoraborate (C.sub.2 H.sub.5).sub.4 NBF.sub.4.
- 6. The electric double-layer capacitor according to claim 3, wherein said pair of polarizable electrodes are impregnated with an electrolytic solution of sulfuric acid.
- 7. A process for producing activated carbon/polyacene composite comprising the steps of: mixing activated carbon powder or fiber and a phenole-formaldehyde resin powder to provide a mixture of them; and subjecting said mixture to heat treatment in nonoxidizing atmosphere within a range of 600.degree. to 1000.degree. C. which is insufficient to reach full carbonization of said phenole-formaldehyde resin.
- 8. The process according to claim 7, wherein said mixture is of a paste mixture having a solvent of said phenole-formeldehyde resin, and a step of forming a film of said paste mixture on a substrate by screen printing or spin coating is carried out before said heat treatment.
- 9. The process according to claim 7, wherein a ratio range of said activated carbon to said phenole-formaldehyde resin of said mixture is selected to be 50/50 to 70/30 by weight.
- 10. A process for producing activated carbon/polyacene composite comprising the steps of: mixing activated carbon powder or fiber and a thermosetting resin powder to provide a mixture of them; and subjecting said mixture to heat treatment in nonoxidizing atmosphere within a temperature range which is insufficient to reach full carbonization of said thermosetting resin;
- wherein said thermosetting resin is phenole-formaldehyde resin, and said heat treatment temperature is within a range of 700.degree. to 900.degree. C.
- 11. A process for producing an activated carbon/polyacene composite comprising the steps of: mixing phenolic activated carbon powder and phenole-formaldehyde resin powder to provide a mixture of them such that a ratio of said carbon powder to said resin powder is selected to be 50/50 to 70/30 by weight; and heating said mixture in nonoxidizing atmosphere at a temperature range of 700.degree. to 900.degree. C. for two hours.
- 12. An activated carbon/polyacene composite produced by the process of claim 10.
- 13. An activated carbon/polyacene composite containing activated carbon powder or fiber and a phenole-formaldehyde resin powder and having a selected molar ratio range of hydrogen atoms [H] to carbon atoms [C] as follows:
- 0.01.ltoreq.[H]/[C].ltoreq.0.2.
- 14. The activated carbon polyacene composite according to claim 13, wherein said activated carbon powder or fiber and thermosetting resin powder are subjected to heat treatment in non-oxidizing atmosphere within a range of 600.degree. to 1,000.degree. C. which is insufficient to reach full carbonization of said phenole-formaldehyde resin.
- 15. The activated carbon polyacene composite according to claim 14, wherein said heat treatment temperature is within a range of 700.degree. to 900.degree. C.
- 16. An electric double-layer capacitor comprising a pair of polarizable electrodes which comprise the activated carbon/polyacene composite of claim 14.
- 17. The electric double-layer capacitor according to claim 16, wherein a capacitance per unit volume is selected to be 7.7 F/cm.sup.3 or more and an equivalent series resistance is selected to be 2.51 or less under a condition of no compression.
Priority Claims (6)
Number |
Date |
Country |
Kind |
2-72208 |
Mar 1990 |
JPX |
|
2-107431 |
Apr 1990 |
JPX |
|
2-249961 |
Sep 1990 |
JPX |
|
2-249970 |
Sep 1990 |
JPX |
|
2-266498 |
Oct 1990 |
JPX |
|
2-266499 |
Oct 1990 |
JPX |
|
Parent Case Info
This is a continuation of application Ser. No. 07/674,675, filed on Mar. 25, 1991 and now abandoned.
US Referenced Citations (4)
Continuations (1)
|
Number |
Date |
Country |
Parent |
674675 |
Mar 1991 |
|