Cerium batteries

• US 7,625,663 B2
• Filed: 02/12/2002
• Issued: 12/01/2009
• Est. Priority Date: 08/10/2001
• Status: Expired due to Fees

• Current Assignee: ITI Scotland Limited (Scottish Government)
• Original Assignee: Plurion Limited Company
• Inventors: Millington, Peter J., Mohanta, Samaresh, Harrison, Stephen, Clarke, Robert Lewis, Dougherty, Brian
• Primary Examiner(s): Ryan; Patrick
• Assistant Examiner(s): Parsons; Thomas H.
• Application Number:
  US10/483,941
• Publication Number:
  US 20040202925A1
• Time in Patent Office: 2,849 Days
• Field of Search: 429/105, 429/340, 429/347
• US Class Current: 429/105
• CPC Class Codes: H01M 10/36 Accumulators not provided for in groups H01M10/05-H01M10/34
• CPC Class Codes: H01M 2300/0005 Acid electrolytes
• CPC Class Codes: H01M 4/368 Liquid depolarisers
• CPC Class Codes: H01M 4/38 of elements or alloys
• CPC Class Codes: H01M 6/04 Cells with aqueous electrolyte
• CPC Class Codes: H01M 6/045 characterised by aqueous electrolyte
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A power cell (100A) has an electrolyte that includes a reodox pair comprising cerium. The electrolyte in preferred cells is an acid electrolyte that comprises a element ion complexed by an organic acid or a chelating agent, and contemplated electrolytes may further include a compound that reduces the hydrogen overpotential. Where the power cell comprises a plurality of cells (100B), preferred configurations may include glassy carbon as bipolar electrolytes.

Claims

1. A battery comprising a cathode and an anode, wherein both the cathode and the anode are in contact with a catholyte and an anolyte, respectively, wherein the catholyte and the anolyte include first and second elements, respectively, wherein the first element is a lanthanide, wherein the second element is selected from the group consisting of zinc, titanium, lead, mercury, chromium, cadmium, and tin, and wherein reduction of the first element at the cathode and oxidation of the second element at the anode provides current produced by the battery.

2. The battery of claim 1 wherein each of the catholyte and the anolyte are an acid electrolyte.

3. The battery of claim 2, wherein the acid electrolyte comprises an organic acid.

4. The battery of claim 3, wherein the organic acid comprises methane sulfonic acid.

5. The battery of claim 4 wherein the methane sulfonic acid forms a complex with the lanthanide when the methane sulfonic acid is deprotonated and when the lanthanide is in a cationic form.

6. The battery of claim 5, wherein the methane sulfonic acid further forms a complex with the second element when the methane sulfonic acid is deprotonated and when the second element is in a cationic form.

7. The battery of claim 2, wherein each of the catholyte and the anolyte further comprises a chelating agent.

8. The battery of claim 7, wherein the chelating agent comprises ethylenediamine tetraacetic acid.

9. The battery of claim 2, wherein each of the catholyte and the anolyte further comprises a compound that reduces hydrogen overpotential.

10. The battery of claim 9, wherein the compound is selected from the group consisting of indium, bismuth, tin, gallium, thallium, diindium trioxide, dibismuth trioxide, tin oxide, and digallium trioxide.

11. A battery comprising a cell with a separator that separates the cell into a cathode compartment and an anode compartment, wherein the cathode compartment includes a catholyte that includes cerium, wherein the anode compartment comprises an anolyte that includes a second element, and wherein the cerium and the second element allow normal operation of the battery when the anode compartment comprises at least 5 vol % catholyte, and wherein the second element is chemically distinct from the cerium, and wherein reduction of the cerium at the cathode and oxidation of the second element at the anode provides current produced by the battery.

12. The battery of claim 11 wherein the anode compartment comprises at least 10 vol % catholyte under operating conditions.

13. The battery of claim 11 wherein the separator comprises a solid polymer electrolyte membrane.

14. The battery of claim 11 wherein the separator comprises a copolymer of perfluorosulfonic acid and polytetrafluoroethylene.

15. The battery of claim 11 wherein the battery comprises a plurality of cells, and wherein at least some of the cells include a bipolar electrode.

16. The battery of claim 15 wherein the bipolar electrode comprises glassy carbon.

17. The battery of claim 11 wherein the second element is selected from the group consisting of zinc, titanium, lead, mercury, cadmium, and tin.

18. The battery of claim 17 wherein the second element is zinc, and wherein the electrolyte comprises methane sulfonic acid.

19. The battery of claim 18 having an open circuit voltage of at least 2.4 Volt.

20. The battery of claim 11 wherein the cerium is replaced by a lanthanide other than cerium.