Alkaline cell with polymer electrolyte
US6916577B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2002 |
| Grant date | Jul 12, 2005 |
| Priority date | — |
| Expiry date | Jan 16, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An alkaline cell having an anode comprising zinc, a cathode comprising manganese dioxide and an electrolyte comprising polyvinylbenzyltrimethylammoniumhydroxide. The anode can comprise particulate zinc dispersed within an aqueous gel comprising crosslinked polyvinylbenzyltrimethylammoniumhydroxide polymer. Optionally, aqueous KOH can be added to the gel. The anode and cathode are desirably in the shape of a slab each having a pair of opposing parallel flat faces defining two opposing ends. The zinc particles dispersed in crosslinked polyvinylbenzytrimethylammoniumhydroxide polymer can be concentrated at one end of the anode slab with the opposing end being clear of zinc. The clear end of the anode preferably also comprising polyvinylbenzlytrimethylammoniumhydroxide functions as a separator between anode and cathode. The cathode slab comprises a mixture of particulate manganese dioxide, graphite, and linear polyvinylbenzyltrimethylammoniumhydroxide polymer. The polyvinylbenzyltrimethylammoniumhydroxide polymer functions to bind the manganese dioxide particles and also functions as electrolyte during cell discharge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.