ANODE FOR A MAGESIUM BATTERY AND METHOD FOR THE PRODUCTION THEREOF

Abstract

An anode for a magnesium battery, including a core element made from a core material, wherein a magnesium coating is at least partially arranged on a surface of the core element, a protective layer being arranged on a surface of the magnesium coating. A method for producing such an anode and a magnesium battery having at least one such anode are also provided.

Claims

1. An anode for a magnesium battery, comprising: a core element made from a core material; a magnesium coating is at least partially arranged on a surface of the core element; wherein a protective layer arranged on a surface of the magnesium coating, the protective layer is: a) metallic and consists of one of the following elements: aluminum, copper, silicon, titanium, tantalum, niobium, nickel, molybdenum, silver, or an alloy of at least two of the following elements: aluminum, copper, tin, silicon, titanium, tantalum, niobium, nickel, molybdenum, silver, or b) ceramic and consists of elements from the group comprising aluminum, copper, tin, silicon, titanium, tantalum, niobium, nickel, molybdenum, silver, carbon, nitrogen, oxygen; or c) the protective layer consists of metal sulfide, wherein at least one of the following elements from the group comprising aluminum, copper, tin, silicon, titanium, tantalum, niobium, nickel, molybdenum, silver, forms the metal sulfide, or d) the protective layer consists of carbon or doped carbon.

2. The anode according to claim 1, wherein the protective layer is the ceramic protective layer and is a metal oxide layer.

3. The anode according to claim 1, wherein the protective layer is the ceramic protective layer and is formed from at least one of a carbide or nitride compound.

4. The anode according to claim 1, wherein the protective layer has a layer thickness of at least 0.5 nm and at most 5 μm.

5. The anode according to claim 1, wherein the magnesium coating has a layer thickness in a range of 50 nm to 200 μm.

6. The anode according to claim 1, wherein the core material is formed from at least one material of the group comprising aluminum, copper, steel or a polymer material.

7. A method for producing an anode according to claim 1, comprising at least the method steps of: providing the core element; applying the magnesium coating to at least a part of a surface of the core element; and applying the protective layer to the surface of the magnesium coating.

8. The method according to claim 7, wherein the magnesium coating is applied to at least the part of the surface of the core element by a galvanic process, lamination process, PVD process, CVD process, ALD process, plating process, thermal spraying process or melting process.

9. The method according to claim 7, wherein the protective layer is applied to the surface of the magnesium coating by a galvanic process, PVD process, CVD process, plating process or ALD process.

10. A magnesium battery comprising: at least one anode according to claim 1, and at least one cathode made of a cathode material containing a sulfur component.

11. An anode for a magnesium battery, comprising: a core element; a magnesium coating at least partially arranged on a surface of the core element; and a ceramic protective layer arranged on a surface of the magnesium coating, the ceramic protective layer consists of elements from the group aluminum, copper, tin, silicon, titanium, tantalum, niobium, nickel, molybdenum, silver, carbon, nitrogen, or oxygen.

12. The anode according to claim 11, wherein the protective layer is a metal oxide layer.

13. The anode according to claim 11, wherein the ceramic protective layer is formed from at least one of a carbide or nitride compound.

14. The anode according to claim 11, wherein the ceramic protective layer has a layer thickness of at least 0.5 nm and at most 5 μm.

15. The anode according to claim 11, wherein the magnesium coating has a layer thickness in a range of 50 nm to 200 μm.

16. The anode according to claim 11, wherein the core comprises a core material formed from at least one material of the group comprising aluminum, copper, steel or a polymer material.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Further measures improving the disclosure are shown in more detail below together with the description of a preferred exemplary embodiment based on the two figures, wherein the same elements are provided with the same reference numeral. In the figures,

[0044] FIG. 1 shows a highly simplified schematic sectional view of a magnesium battery according to the disclosure, which is only partially shown,

[0045] FIG. 2 shows a highly simplified schematic sectional view of an anode according to the disclosure, which is only partially shown.

DETAILED DESCRIPTION

[0046] FIG. 1 shows a magnesium battery 2 according to the disclosure in a highly simplified manner. The magnesium battery 2 has multiple battery cells 8, wherein only a part of a single battery cell 8 is shown herein for reasons of simplicity. The battery cell 8 has multiple anodes 1 and cathodes 7, which are arranged in an electrolyte 6. A surface of the respective anode 1 is fully covered with a protective layer 5.

[0047] FIG. 2 shows a section of the anode 1 according to FIG. 1. The anode 1 has a core element 3, which is formed from the core material aluminum here. A magnesium coating 4 is arranged on a surface of the core element 3 as the active material of the anode 1, wherein the magnesium coating 4 was formed, for example, by a melting process. The protective layer 5 is arranged on a surface of the magnesium coating 4. For example, the protective layer 5 is metallic and formed from aluminum or is ceramic and formed from a copper oxide. In particular, the PVD process is suitable for forming the protective layer 5. The protective layer 5 preferably has a layer thickness of at least 0.5 nm and at most 5 μm. The electrolyte 6 is not adjacent to the magnesium coating 4, but only to the protective layer 5. This increases the longevity of the anode 1 and enhances the performance of the magnesium battery 2.

LIST OF REFERENCE NUMERALS

[0048] 1 Anode [0049] 2 Magnesium battery [0050] 3 Core element [0051] 4 Magnesium coating [0052] 5 Protective layer [0053] 6 Electrolyte [0054] 7 Cathode [0055] 8 Battery cell