Electrochemical system using conductive plastic
US4098967A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 20, 1975 |
| Grant date | Jul 4, 1978 |
| Priority date | — |
| Expiry date | Jan 20, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a conductor-electrolyte-active material electrochemical environment, the conductor is protected against corrosion by that portion of the conductor in contact with the electrolyte and active material being formed of plastic filled with vitreous carbon. Adequate conductivity is obtained by finely dividing the vitreous carbon and loading the plastic with 40%-80% carbon by volume. The filled plastic is particularly effective as a bipolar plate substrate. A layer of lead-antimony foil bonded to the carbon-filled plastic provides a good surface for adhering active materials. A lead sheet can be bonded to the substrate to define a low resistance terminal. Forming the edges of the substrate of thicker sections of unfilled -- hence nonconductive -- plastic allows the plates to be stacked to define a battery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.