Process for fabricating ribbed electrode substrates and other articles
A process for fabricating a resin bonded carbon fiber article, and in particular electrochemical cell electrode substrates and the like requiring different mean pore sizes in different areas, involves simultaneously heating and compacting different mixtures of carbon fibers and resin in different areas of an article forming mold, wherein the carbon fibers in each of the different mixtures have different, known bulk densities. The different bulk densities of the carbon fibers in the mixtures are chosen to yield the desired mean pore sizes and other properties in the article after heating and compacting the mixtures. Preferably, the different bulk densities are obtained using different carbon fiber lengths in the molding mixtures. The process is well suited to forming ribbed electrode substrates with preselected optimum mean pore sizes, porosities, and densities in the ribs, the webs connecting the ribs, and in the edge seals.
- Research Organization:
- United Technologies Corporation, Hartford, CT (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC03-77ET11302
- Assignee:
- United Technologies Corporation (Hartford, CT)
- Patent Number(s):
- 4,426,340
- Application Number:
- 06/306,836
- OSTI ID:
- 864840
- Country of Publication:
- United States
- Language:
- English
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