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US 3,954,501 AGranted
Rechargeable electrodes utilizing unsintered fluorocarbon binder
OwnerGuy Rampelinventor
Life of this patent
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Abstract
Polytetrafluoroethylene in aqueous dispersion is mixed with a finely divided electrochemically active rechargeable electrode material, such as zinc, zinc oxide, cadmium, cadmium oxide, nickel oxide, copper, copper oxide, silver, silver oxide, mercuric oxide, etc. The dispersion is broken by drying, freezing, solvent extraction, etc. Where zinc particles form the active material it may be desirable to amalgamate the zinc with mercury.
Claims9
A rechargeable electrolytic cell having enhanced gas recombination, capacity and cycle life, said cell comprising:
- a positive electrode;
- a negative electrode;
- a separator;
- an electrolyte;
- and
- one of said electrodes comprising:
- a foraminous, electrically conductive, substrate;
- a paste supported by said substrate, said paste comprising:
- a finely divided, particulate, rechargeable, active material;
- and
- a fibrous interconnecting network of an unsintered, uncoalesced, hydrophobic linear fluorocarbon polymer, said active material dispersed throughout and bound in said network and being highly accessible to said electrolyte and to gas being generated during overcharge of the cell.
8 more elements
A rechargeable cell comprising positive and negative electrodes, at least one of said electrodes comprising:
- a a sintered porous plaque of bonded metallic powder;
- b an active material dispersed in the pores of said plaque;
- and
- c an unsintered, hydrophobic, fibrous, linear fluorocarbon polymer dispersed in the pores of said plaque.
1 more element
Dependencies are inferred from the claim text.