New Carbon Activation Process for Increased Surface Accessibility in Electrochemical Capacitors
Description:
A process for making carbon film or powder suitable for double capacitor electrodes having a capacitance of up to about 300 F/cm{sup 3} is disclosed. This is accomplished by treating in aqueous nitric acid for a period of about 5 to 15 minutes thin carbon films obtained by carbonizing carbon-containing polymeric material having a high degree of molecular directionality, such as polyimide film, then heating the treated carbon film in a non-oxidizing atmosphere at a non-graphitizing temperature o…
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Date:
March 16, 1999
Creator:
Doughty, Daniel H. & Eisenmann, Erhard T.
Item Type:
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Partner:
UNT Libraries Government Documents Department