ALUMINUM BROMIDE FUSED SALT BATTERY

• US 3,650,834 A
• Filed: 01/28/1970
• Issued: 03/21/1972
• Est. Priority Date: 01/28/1970
• Status: Expired due to Term

• Current Assignee: Edward S. Buzzelli
• Original Assignee: Edward S. Buzzelli
• Inventors: Buzzelli, Edward S.
• Primary Examiner(s): Douglas, Winston A.
• Assistant Examiner(s): LeFevour, C. F.
• Application Number:
  US05/006,410
• Time in Patent Office: 783 Days
• Field of Search: 136/22,6,83,153,20
• US Class Current: 429/112
• CPC Class Codes: H01M 10/399 Cells with molten salts
• CPC Class Codes: H01M 4/583 Carbonaceous material, e.g. graphite-intercalation compounds or CFx
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

The secondary electrical energy storage battery of this invention comprises a carbon cathode, an aluminum metal anode, and a fused salt electrolyte containing an aluminum halide in admixture with one or more of the halides of the alkali metals. The electrical energy storage device described has the advantage of being operable in a lower temperature range than presently known fused salt batteries.

Claims

2. The electrical energy storage device of claim 1 wherein the electrolyte comprises a mixture of from about 80 to 20 parts by weight of aluminum bromide and 20 to 80 parts by weight of one or more of the halides of the alkali metals.

3. The electrical energy storage device of claim 2 wherein the cathode is composed of porous carbon having a surface area in the range of from about 10 to 2,000 meters2 /gram.

4. The electrical energy storage device of claim 2 wherein the cathode is composed of pyrolytic graphite.

5. The electrical energy storage device of claim 3 wherein the electrolyte consists of a mixture of aluminum bromide, sodium chloride and potassium chloride.

6. The electrical energy storage device of claim 3 wherein the carbon cathode contains an electrochemically-formed tellurium-carbon complex.

7. A secondary electrical energy storage device comprising in combination:

a. a container, b. an electrolyte in said container consisting essentially of a mixture of aluminum bromide, sodium chloride and potassium chloride, c. a pair of spaced electrodes consisting of a porous carbon cathode and an aluminum anode immersed in said electrolyte, d. an inert, nonconductive ion-permeable separator disposed between and separating said electrodes (c), said device being operable above the melting point of the electrolyte.

8. The electrical energy storage device of claim 6 wherein tellurium is present in the carbon cathode in amounts of from about 5 to 40 percent by weight, based on the weight of the carbon.