Aluminum-ferricyanide battery
First Claim
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1. An electrical storage cell comprising two electrochemical half cells positioned in electrochemical contact with one another, at least one of said two half cells comprising:
- seawater used as an aqueous salt solution comprising ferricyanide anions, the solution comprising at least about 0.001 molar ferricyanide;
a current transferring electrocatalytic electrode positioned in electron-transferring contact with said aqueous solution; and
the remaining half cell of said two half cells including an anode of material comprised of aluminum at least about 99.99% purity.
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Abstract
A battery capable of producing high current densities with a high charge acity is described which includes an aluminum anode, a ferricyanide electrolyte and a second electrode capable of reducing ferricyanide electrolyte which is either dissolved in an alkaline solution or alkaline seawater solution. The performance of the battery is enhanced by high temperature and high electrolyte flow rates.
55 Citations
37 Claims
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1. An electrical storage cell comprising two electrochemical half cells positioned in electrochemical contact with one another, at least one of said two half cells comprising:
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seawater used as an aqueous salt solution comprising ferricyanide anions, the solution comprising at least about 0.001 molar ferricyanide; a current transferring electrocatalytic electrode positioned in electron-transferring contact with said aqueous solution; and the remaining half cell of said two half cells including an anode of material comprised of aluminum at least about 99.99% purity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A method of generating a direct current between a first contact point and a second contact point in an electrical storage cell including two half cells having seawater used as an aqueous salt solution including ferricyanide anions, a current transferring electrocatalytic electrode positioned in said aqueous solution and an anode which includes the steps of:
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providing said aqueous salt solution comprising ferricyanide anions, said solution comprising 0.001 m by weight; positioning a solid electrode in electron-transferring contact with said aqueous solution and in electron-transferring contact with said second contact point; providing an aluminum redox couple complementary to said ferricyanide anions, positioned in ion-current transferring contact with said aqueous solution and in electron-transferring contact with said second contact point; establishing electrical contact with said first contact point and said second contact point; and whereby said ferricyanide anions are reduced and said aluminum is oxidized, generating an electrical current and potential between said first contact point and said second contact point. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37)
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Specification