Lead dioxide--zinc rechargeable-type cell and battery and electrolyte therefor

Patent · Tue Jun 22 00:00:00 EDT 1976

OSTI ID:7269686

Villarreal-Dominguez, E

A lead dioxide--zinc rechargeable-type cell comprises at least one positive lead dioxide plate and at least one negative amalgamated zinc metal plate spaced from the positive plate and parallel to it. Both plates are permanently submerged in an aqueous acid electrolytee containing soluble zinc salts, a zinc surface-controlling agent, an electrolyte conductivity-correcting agent, and an amalgamating agent to prevent formation of localized cells or electrolytic pairs on the zinc plate during discharge. An electrolyte suitable to be used in a lead dioxide--zinc rechargeable-type cell comprises an aqueous acid solution of a zinc salt, aluminum sulfate as the zinc surface-controlling agent, sodium sulfate as the electrolyte conductivity-correcting agent, mercuric sulfate as the amalgamating agent, and sulfuric acid as an aggressive agent which also acts to minimize the ''treeing'' of the anodic surfaces. More particularly, an electrolyte to be used in a lead dioxide--zinc rechargeable-type cell comprises from 1 to 5 g/l of zinc sulfate, 25 to 75 g/l of sodium sulfate, 25 to 75 g/l of aluminum sulfate, 2 to 8 g/l of mercuric sulfate, and 250 to 500 g/l sulfuric acid, the remainder being water. Preferably, the electrolyte may additionally contain 10 to 30 g/l of a suitable gum such as dextrin to improve the physical structure of the zinc deposited, and 5 to 15 g/l of dibutyl amine as a corrosion inhibitor.

• Assignee: TIC; ERA-01-025893; EDB-76-074391
• Patent Number(s): US 3964927
• OSTI ID: 7269686
• Resource Relation: Patent File Date: Filed date 10 Oct 1974
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
METAL-METAL OXIDE BATTERIES
ELECTROLYTES
AMINES
AQUEOUS SOLUTIONS
DEXTRIN
LEAD OXIDES
SODIUM SULFATES
SULFURIC ACID
ZINC
ZINC SULFATES
ALKALI METAL COMPOUNDS
CARBOHYDRATES
CHALCOGENIDES
DISPERSIONS
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELEMENTS
ENERGY STORAGE SYSTEMS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
LEAD COMPOUNDS
METALS
MIXTURES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLYSACCHARIDES
SACCHARIDES
SODIUM COMPOUNDS
SOLUTIONS
SULFATES
SULFUR COMPOUNDS
ZINC COMPOUNDS
250901* - Energy Storage- Batteries- Design & Development
250903 - Energy Storage- Batteries- Materials
Components
& Auxiliaries