Lithographically defined microporous carbon-composite structures
| DWPI Title: Making composite structure, used in electrodes, comprises mixing foreign particulate matter into carbon-containing photoresist, depositing photoresist onto substrate, lithographically patterning the deposited photoresist, and pyrolyzing |
| Abstract: A microporous carbon scaffold is produced by lithographically patterning a carbon-containing photoresist, followed by pyrolysis of the developed resist structure. Prior to exposure, the photoresist is loaded with a nanoparticulate material. After pyrolysis, the nanonparticulate material is dispersed in, and intimately mixed with, the carbonaceous material of the scaffold, thereby yielding a carbon composite structure. |
| Use: The method is useful for making a composite structure (claimed) that is useful in electrodes for electrochemical sensors and batteries. |
| Advantage: The method: utilizes the lithographic patterning so as to define a three-dimensional microporous structure, and thus provides the composite structure exhibiting enhanced mechanical, electrical, optical and electrochemical behaviors as compared to standard pyrolyzed carbon structures, while preserving the triangular lattice structure of the patterned resist even after shrinkage in the carbon scaffold; utilizes the photoresist that can be patterned optically so as to define the final desired structure without requiring additional processing, hence simple; utilizes the flakes of reduced graphene oxide that serve as stiffening agents for the scaffold of amorphous carbon; and provides a dramatic increase in the surface area of the carbon scaffold. |
| Novelty: Making a composite structure, comprises: mixing foreign particulate matter into a carbon-containing photoresist; depositing the photoresist onto a substrate; lithographically patterning the deposited photoresist to define a microporous structure in it; developing the patterned photoresist; and pyrolyzing the developed photoresist so as to yield a microporous carbon scaffold in which the particulate matter or its particulate product is dispersed in a single, continuous intermixed phase of carbon and particulate matter or particulate product. |
| Filed: 6/24/2015 |
| Application Number: US14749328A |
| Tech ID: SD 12731.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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