Amorphous metal current collector

• US 10,158,120 B2
• Filed: 12/20/2012
• Issued: 12/18/2018
• Est. Priority Date: 12/21/2011
• Status: Active Grant

• Current Assignee: The Swatch Group Research And Development Ltd (The Swatch Group AG)
• Original Assignee: The Swatch Group Research And Development Ltd (The Swatch Group AG)
• Inventors: Stalder, Michael, Winkler, Yves, Marlot Doerr, Agnes
• Primary Examiner(s): Vo, Jimmy
• Application Number:
  US14/366,050
• Publication Number:
  US 20140363743A1
• Time in Patent Office: 2,189 Days
• CPC Class Codes: C22C 45/00 Amorphous alloys making amorphous non-ferrous alloys C22C1/11
• CPC Class Codes: C22C 45/001 with Cu as the major constituent
• CPC Class Codes: C22C 45/10 with molybdenum, tungsten, niobium, tantalum, titanium, or zirconium or Hf as the major constituent
• CPC Class Codes: H01M 10/02 Details of electrodes H01M4/00; of non-active parts H01M50/00
• CPC Class Codes: H01M 10/0436 Small-sized flat cells or batteries for portable equipment
• CPC Class Codes: H01M 2220/30 Batteries in portable systems, e.g. mobile phone, laptop
• CPC Class Codes: H01M 4/661 Metal or alloys, e.g. alloy coatings H01M4/669 take precedence
• CPC Class Codes: H01M 4/662 Alloys collectors of lead alloys H01M4/685
• CPC Class Codes: H01M 4/70 characterised by shape or form
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

The present invention concerns an electrochemical device comprising a cathode and an anode separated from each other by a separator, the battery further comprising two current collectors so that the anode and cathode are each arranged between the separator and a current collector, characterized in that at least one of the two current collectors is made of an at least partially amorphous material comprising at least one metallic element.

Claims

1. A cell comprising a cathode and an anode separated from each other by a separator, said cell further including an electrolyte and two current collectors so that the anode and the cathode are each arranged between the separator and a current collector, wherein the two current collectors are made of an at least partially amorphous material including at least one metallic element,

wherein a peripheral edge of one of the current collectors is in direct contact with or welded to the separator.

2. The cell according to claim 1, wherein the two collectors are made of a totally amorphous material.

3. The cell according to claim 1, wherein said material includes at least one of the elements found in the list comprising Ti, Zr, Ni, Cu, Fe, Cr, Mn, V, W, and Al.

4. The cell according to claim 1, wherein said material has a maximum resistivity of 10⁻

5 Ohm*m.

5. The cell according to claim 1, wherein said material has a maximum resistivity of 10⁻

6 Ohm*m.

6. The cell according to claim 1, wherein said material includes 47.5% weight percent copper, 47.5% weight percent zirconium and 5% weight percent aluminium.

7. The cell according to claim 1, wherein the thickness of the current collectors is comprised between 1 μ

m and 50 μ

m.

8. The cell according to claim 1, wherein the thickness of the current collectors is comprised between 5 μ

m and 25 μ

m.

9. The cell according to claim 1, wherein the thickness of the current collectors is unequal.

10. The cell according to claim 9, wherein the edges of the current collectors are thicker than the central area of said collectors.

11. The cell according to claim 1, wherein at least one of the two current collectors has structures on the bottom surface thereof.

12. The cell according to claim 1, wherein said at least partially amorphous material comprising at least one metallic element further includes a crystalline element.

13. The cell according to claim 1, wherein at least one of the current collectors is made by melt-spinning.

14. The cell according to claim 1, wherein at least one of the two collectors is made by electrolysis.

15. The cell according to claim 1, wherein the cell or battery is rechargeable.

16. The cell according to claim 1, wherein a total thickness of the cell is 0.4 mm.

17. The cell according to claim 1, wherein the peripheral edge of one of the current collectors is welded to the separator or to a peripheral edge of the other current collector.