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US 10,707,537 B2Granted
Nickel-iron battery with high cycle life
AssigneeEncell Technology, Inc.
InventorRandy Ogg
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Abstract
The present invention provides one with a high cycle life Ni—Fe battery. The battery uses a particular electrolyte. The electrolyte comprises sodium hydroxide, as well as lithium hydroxide and sulfide. The use of the sodium hydroxide based electrolyte with the iron anode in the battery has been found to enhance the performance characteristics of the battery. The resulting characteristics of cycle life, as well as power and charge retention, are much improved over conventional Ni—Fe batteries.
Claims12
A battery, comprising:
- a nickel cathode;
- an iron anode comprising an iron active material that is metal iron or an iron oxide material, and a polyvinyl alcohol binder;
- and
- an electrolyte comprising 6 to 7.5 M sodium hydroxide, 0.5 to 2.0 M lithium hydroxide, and 1-2 wt % sodium sulfide based on the weight of the electrolyte,
- with the battery exhibiting a cycle life of at least about 10,000 cycles.
2 more elements
Dependencies are inferred from the claim text.