Anode and electrolyte for a metal-air battery

Patent metadata

Field	Value
Publication number	US-10326187-B2
Application number	US-201515307808-A
Country	US
Kind code	B2
Filing date	Apr 9, 2015
Priority date	Apr 29, 2014
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

An anode for an aluminum-air battery may include an anode body, which may contain particles of an aluminum alloy in a sodium matrix. An electrolyte for an aluminum-air battery may consist of one of an aqueous acid and an aqueous lye containing at least one halogen and at least one surfactant.

First claim

The invention claimed is:

1. An anode for an aluminium-air battery, comprising an anode body which contains particles of an aluminium alloy embedded in a sodium matrix, wherein the anode body has flow-guiding structures configured to enable a torque to be transmitted to the anode from an electrolyte flow, the flow-guiding structures being in the form of screw-shaped vanes or vane sections.

2. The anode according to claim 1 , wherein the particles have a particle size of 10 μm to 100 μm.

3. The anode according to claim 1 , wherein a fraction of the particles in the anode body lies in a range of 40% to 80%, the remainder being the sodium matrix.

4. The anode according to claim 1 , wherein the aluminium alloy contains zirconium.

5. The anode according to claim 4 , wherein the aluminium alloy contains 0.01% to 1.00% zirconium.

6. The anode according to claim 5 , wherein the aluminium alloy contains 0.05% to 0.80% zirconium.

7. A method for manufacturing an anode for an aluminium-air battery, comprising:
embedding particles of a granular material comprising an aluminium alloy into a sodium matrix; and
casting an anode body of the anode comprising the sodium matrix with the granular material, the anode body having flow-guiding structures in the form of screw-shaped vanes or vane sections, the flow-guiding structures configured to enable a torque to be transmitted to the anode from an electrolyte flow.

8. An electrolyte for driving the anode according to claim 1 , the electrolyte consisting of an aqueous lye containing at least one halogen and at least one surfactant.

9. The electrolyte according to claim 8 , wherein the aqueous lye comprises a 10% to 40% fraction in water.

10. The electrolyte according to claim 8 , wherein the at least one halogen comprises a 0.1% to 4.0% fraction in the aqueous lye.

11. The electrolyte according to claim 10 , wherein the at least one halogen comprises a 0.5% to 2.0% fraction in the aqueous lye.

12. The electrolyte according to claim 8 , wherein the at least one halogen is a fluoride.

13. The electrolyte according to claim 8 , wherein the at least one surfactant comprises a fraction of 0.1% to 2.0% in the aqueous lye.

14. The electrolyte according to claim 13 , wherein the at least one surfactant comprises a fraction of 0.2% to 1.0% in the aqueous lye.

15. The electrolyte according to claim 8 , wherein the at least one surfactant is sodium lauryl sulphate.

16. A metal-air battery, comprising:
a housing having an electrolyte inlet and an electrolyte outlet;
a cathode separating an air space from an electrolyte space in the housing;
an anode;
an electrolyte disposed between the cathode and the anode;
wherein the anode includes an anode body which contains particles of an aluminium embedded alloy in a sodium matrix;
wherein the electrolyte consists of one of an aqueous acid or an aqueous lye containing at least one halogen and at least one surfactant; and
wherein the electrolyte inlet arranged tangentially to an electrolyte space; and wherein the anode body has flow-guiding structures configured to enable a torque to be transmitted to the anode from a flow of the electrolyte, the flow-guiding structures being in the form of screw-shaped vanes or vane sections.

17. The anode according to claim 2 , wherein the particles have a particle size of 40 μm to 60 μm.

18. The anode according to claim 3 , wherein a fraction of the particles in the anode body lies in a range of 60% to 70%.

19. The electrolyte according to claim 8 , wherein the at least one halogen is potassium aluminium pentafluoride.

20. The electrolyte according to claim 9 , wherein the at least one halogen comprises a 0.1% to 4.0% fraction in the aqueous lye.

Assignees

• Mahle Int Gmbh

Inventors

• Englert Peter

Classifications

• H01M12/06 Primary

  with one metallic and one gaseous electrode · CPC title

• H01M4/381

  Alkaline or alkaline earth metals elements (H01M4/40 takes precedence) · CPC title

• H01M2300/0002

  Aqueous electrolytes · CPC title

• H01M6/5077

  Regeneration of reactants or electrolyte · CPC title

• H01M6/5038

  Heating or cooling of cells or batteries · CPC title