Homogeneous solid metallic anode for thin film microbattery

Patent metadata

Field	Value
Publication number	US-10096802-B2
Application number	US-201414340343-A
Country	US
Kind code	B2
Filing date	Jul 24, 2014
Priority date	Apr 8, 2014
Publication date	Oct 9, 2018
Grant date	Oct 9, 2018

Abstract

A battery, comprising a cathode comprising a cathode material in contact with a cathode current collector. The battery also comprises an electrolyte. The battery also comprises an anode comprising an electroplated homogeneous solid metallic alloy comprising 100 ppm to 1000 ppm Bi and 100 ppm to 1000 ppm In, and a remainder Zn.

First claim

What is claimed is:

1. A battery, comprising:
a cathode comprising a cathode material and in contact with a cathode current collector, wherein the cathode current collector comprises a transparent conducting oxide (TCO);
an electrolyte; and
an anode comprising a homogeneous solid composed of a metallic alloy comprising 100 ppm to 1000 ppm Bi, 100 ppm to 1000 ppm In, and a remainder Zn.

2. The battery of claim 1 , wherein a concentration of In is in a range of 100 ppm to 500 ppm and a concentration of Bi is in a range of 100 ppm to 500 ppm.

3. The battery of claim 1 , wherein the homogeneous solid has a resistivity in a range of about 5×10 −8 to 6×10 −8 ohm-m.

4. The battery of claim 1 , wherein the electrolyte comprises one or more of the following: zinc chloride, zinc acetate, potassium hydroxide, and ammonium chloride.

5. The battery of claim 1 , wherein a thickness of the anode is in a range of 1 micron to 50 microns.

6. The battery of claim 1 , wherein a potential for an onset of hydrogen evolution as measured on a cyclic voltammetry curve is less than −1.6V relative to Hg/HgO for a KOH solution.

7. A battery, comprising:
a cathode comprising a cathode material and in contact with a cathode current collector;
an electrolyte; and
an anode comprising a homogeneous solid composed of a metallic alloy comprising 100 ppm to 1000 ppm Bi, 100 ppm to 1000 ppm In, and the remainder Zn, wherein the battery has a volume less than 1 cubic mm.

8. The battery of claim 1 , wherein the battery has a flexibility defined by a radius of curvature of between about 4 mm and about 20 mm.

9. A battery, comprising:
a cathode comprising a cathode material and in contact with a cathode current collector;
an electrolyte; and
an anode comprising a homogeneous solid composed of a metallic alloy comprising 100 ppm to 1000 ppm Bi, 100 ppm to 1000 ppm In, and the remainder Zn, wherein the battery has a thickness of less than about 150 microns.

10. The battery of claim 1 , wherein the battery has an open circuit voltage of between 1.4V and 1.8V and has a discharge capacity of between 10 uA-hours and 200 uA-hours.

11. The battery of claim 1 , wherein the electrolyte has a pH in the range of 3 to 7.

12. The battery of claim 1 , wherein the battery has a shape of an arc.

13. The battery of claim 1 , wherein the cathode comprises one or more of the following: NiOOH and MnO 2 .

14. The battery of claim 1 , wherein the transparent conducting oxide comprises one or more of the following: indium tin oxide (ITO), indium zinc oxide (IZO), Al-doped zinc oxide (AZO), and Ga-doped zinc oxide (GZO).

Assignees

• IBM

Inventors

• Andry Paul S
• Fritz Gregory M
• Gordon Michael S
• Lewandowski Eric P
• Luo Yu

Classifications

• Y10T29/49115

  including coating or impregnating · CPC title

• Y10T29/49108

  Electric battery cell making · CPC title

• H01M10/0436

  Small-sized flat cells or batteries for portable equipment · CPC title

• H01M4/139

  Processes of manufacture · CPC title

• C25D5/50

  by heat-treatment · CPC title