Electrically rechargeable battery. [Zn anode with circulating ferricyanide salt; 35 mA/cm/sup 2/, 1. 4 V, 91% efficient]
An electrically rechargeable battery comprises an inert cathode, a zinc anode, and an aqueous alkaline electrolyte, for example, NaOH, in which the anode and cathode are immersed. The alkaline electrolyte in the vicinity of the cathode contains an alkali metal ferricyanide salt, such as K/sub 3/Fe(CN)/sub 6/ or Na/sub 3/Fe(CN)/sub 6/. Optionally, a mechanical separator is utilized between the anode and cathode to prevent gross mixing of the saturated electrolyte at the cathode with the electrolyte in the vicinity of the anode. Preferably, the separator is of the ion exchange type. During electrical discharge at the anode and cathode, the battery produces soluble reaction products that are transported in the electrolyte to respective external storage tanks that increase battery capacity. During the charge cycle, the reverse conditions occur. 3 figures.
- Assignee:
- Lockheed Missiles and Space Co., Inc.
- Patent Number(s):
- US 4180623
- OSTI ID:
- 5192397
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
250901* -- Energy Storage-- Batteries-- Design & Development
ALKALI METAL COMPOUNDS
AMBIENT TEMPERATURE
CIRCULATING SYSTEMS
COMPLEXES
DESIGN
EFFICIENCY
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELECTROLYTES
ELEMENTS
ENERGY STORAGE
ENERGY STORAGE SYSTEMS
FERRICYANIDES
HYDROGEN COMPOUNDS
HYDROXIDES
IRON COMPLEXES
METALS
OFF-PEAK ENERGY STORAGE
OXYGEN COMPOUNDS
POTASSIUM COMPOUNDS
SODIUM COMPOUNDS
SODIUM HYDROXIDES
STORAGE
TRANSITION ELEMENT COMPLEXES
ZINC