Halogen hydrates

• US 3,935,024 A
• Filed: 01/03/1973
• Issued: 01/27/1976
• Est. Priority Date: 06/26/1970
• Status: Expired due to Term

• Current Assignee: Energy Development Associates, Inc. (Paramount Global (f/k/a ViacomCBS Inc.))
• Original Assignee: Energy Development Associates, Inc. (Paramount Global (f/k/a ViacomCBS Inc.))
• Inventors: Symons, Philip Charles
• Primary Examiner(s): Williams, Howard S.
• Assistant Examiner(s): LeFevour, C. F.
• Application Number:
  US05/320,806
• Time in Patent Office: 1,119 Days
• Field of Search: 136/6 E, 136/6 F, 136/6 R, 136/83, 136/161, 136/162, 136/154, 136/155, 136/86 A, 136/86 C
• US Class Current: 429/51
• CPC Class Codes: H01M 10/365 Zinc-halogen accumulators
• CPC Class Codes: H01M 12/085 Zinc-halogen cells or batteries
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A process for the useful storage of electrical energy employing halogen hydrates is described. The halogen hydrate can be generated during the charging of a secondary battery or may be chemically generated and placed in a primary battery.

Claims

1. A method for producing electric current from an electrical energy storage device having an electrode compartment means containing therein a positive electrode means and a negative electrode means comprised of a metallic surface, which will combine electrochemically with a halogen, comprising the steps of:

1. circulating an aqueous metal halide electrolyte solution sequentially past said electrode means in said electrode compartment means, externally of said electrode compartment means and back past said electrode means;

2. decomposing a halogen hydrate thereby producing its thermal decomposition products, namely halogen and water;

3. passing said decomposition products into said electrolyte while it is being circulated external to said electrode compartment thereby dissolving at least a portion of halogen from said halogen hydrate; and

4. completing the circuit between said positive and negative electrode means.

3. The method of claim 1, wherein the halogen hydrate is chlorine hydrate.

4. The method of claim 1, wherein the electrolyte is a Group II B metal halide solution.

5. The method of claim 1, wherein the electrolyte solution has a concentration of metal halide from about 0.1% by weight to saturation.

6. The method of claim 1, wherein said negative electrode comprises a Group II B metal surface.

7. The method of claim 1, wherein said negative electrode comprises a zinc surface.

8. The method of claim 1, comprising in addition, heating said halogen hydrate to provide said thermal decomposition products.

9. The method of claim 1, wherein the metal halide is zinc chloride.

10. The method of claim 1, wherein the negative electrode is inert.

2. A method for producing electric current from an electrical energy storage device, having an electrode compartment means, containing therein, a positive electrode means, a negative electrode means comprised of a metallic surface which will combine electrochemically with a halogen and an ion permeable diaphragm mounted between said positive electrode means and said negative electrode means so as to provide a positive electrode compartment means and a negative compartment means comprising the steps of:

1. circulating an aqueous metal halide electrolyte solution sequentially past said negative electrode means in said electrode compartment means, externally of said electrode compartment means and back past said negative electrode means;

2. circulating an aqueous metal halide electrolyte solution sequentially past said positive electrode means in said electrode compartment means, externally of said positive electrode compartment means and back past said positive electrode means;

3. decomposing a halogen hydrate thereby producing its thermal decomposition products, namely, halogen and water;

4. passing said decomposition products into said electrolyte from said positive electrode compartment means while it is circulating external to said electrode compartment means thereby dissolving at least a portion of halogen from said halogen hydrate; and

5. completing the circuit between said positive and negative electrode means.

11. The method of claim 2, wherein the halogen hydrate is chlorine hydrate.

12. The method of claim 2, wherein the electrolyte is a Group II B metal halide solution.

13. The method of claim 2, wherein the electrolyte solution has a concentration of metal halide from about 0.1% by weight to saturation.

14. The method of claim 2, wherein said negative electrode comprises a Group II B metal surface.

15. The method of claim 2, wherein said negative electrode comprises a zinc surface.

16. The method of claim 2, comprising in addition, heating said halogen hydrate to provide said thermal decomposition products.

17. The method of claim 2, wherein the metal halide is zinc chloride.

18. The method of claim 2, wherein the negative electrode is inert.