Generation of wrinkle-free silicon monoxide electrodes using combined preformation and formation

Patent metadata

Field	Value
Publication number	US-11495829-B1
Application number	US-201916588307-A
Country	US
Kind code	B1
Filing date	Sep 30, 2019
Priority date	Jul 26, 2017
Publication date	Nov 8, 2022
Grant date	Nov 8, 2022

Abstract

A solid electrolyte interface is formed on a silicon monoxide electrode in a battery cell. While the solid electrolyte interface is being formed on the silicon monoxide electrode, the battery cell is charged for one or more initial cycles.

First claim

What is claimed is:

1. A system, comprising:
a sealed battery cell comprising:
a silicon monoxide electrode that is wrinkle-free and flat; and
a solid electrolyte interface that is formed on the silicon monoxide electrode in the sealed battery cell,

a battery charging system coupled to the sealed battery cell, the battery charging system configured to:
charge and discharge the sealed battery cell for a plurality of cycles while the solid electrolyte interface is being formed on the silicon monoxide electrode at substantially a same rate as charging and discharging the sealed battery cell after the solid electrolyte interface is fully formed,
charge and discharge the sealed battery cell for a first cycle during which the solid electrolyte interface on the silicon monoxide electrode is at a first thickness; and
charge and discharge the sealed battery cell for a second cycle that occurs after the first cycle during which the solid electrolyte interface on the silicon monoxide electrode is at a second thickness that is thicker than the first thickness,
wherein the battery charging system is further configured to:
A) charge the sealed battery cell for the plurality of cycles while the sealed battery cell is compressed, and discharge the sealed battery cell for the plurality of cycles while the sealed battery cell is uncompressed, or
B) charge the sealed battery cell for the plurality of cycles while the sealed battery cell is uncompressed, and discharge the sealed battery cell for the plurality of cycles while the sealed battery cell is compressed.

2. The system recited in claim 1 , wherein the battery charging system is further configured to charge and discharge the sealed battery cell for the plurality of cycles while the sealed battery cell is compressed to a pressure within 25 psi and 75 psi.

3. The system recited in claim 1 , wherein when the solid electrolyte interface is formed, and the sealed battery cell is charged and discharged for the plurality of cycles, the battery charging system is further configured to apply a same charging current to the sealed battery cell multiple times over a same amount of time and up to a same voltage while the sealed battery cell is compressed.

4. The system recited in claim 1 , wherein forming the solid electrolyte interface and charging and discharging the sealed battery cell include the battery charging system applying a same charging current to the sealed battery cell multiple times over a same amount of time within 3 hours and 7 hours and up to a same voltage while the sealed battery cell is compressed.

5. The system recited in claim 1 , wherein when the solid electrolyte interface is formed, and the sealed battery cell is charged and discharged for the plurality of cycles, the battery charging system is further configured to apply a same charging current to the sealed battery cell multiple times over a same amount of time and up to a same voltage within 2.0V and 4.4V while the sealed battery cell is compressed.

6. The system recited in claim 1 , wherein the sealed battery cell is compressed at room temperature before the solid electrolyte interface is formed on the silicon monoxide electrode and before the sealed battery cell is charged and discharged for the plurality of cycles; and
wherein the sealed battery cell is compressed while the sealed battery cell is heated after the solid electrolyte interface is formed on the silicon monoxide electrode and after the sealed battery cell is charged and discharged for the plurality of cycles.

7. The system recited in claim 1 , wherein the sealed battery cell further includes:
an unsealed battery cell including the silicon monoxide electrode filled with a liquid electrolyte, wherein the unsealed battery cell filled with the liquid electrolyte is sealed in order to obtain the sealed battery cell.

8. The system recited in claim 1 , wherein when the solid electrolyte interface is formed, and the sealed battery cell is charged and discharged for the plurality of cycles, the battery charging system is further configured to apply a same charging current to the sealed battery cell multiple times over a same amount of time within 3 hours and 7 hours and up to a same voltage within 2.0V and 4.4V while the sealed battery cell is compressed.

9. A system, comprising:
a sealed battery cell comprising a wrinkle-free flat silicon monoxide electrode and a solid electrolyte interface that is formed on the wrinkle-free flat silicon monoxide electrode in the sealed battery cell, and
a battery charging system coupled to the sealed battery cell, the battery charging system configured to:
charge the sealed battery cell for a plurality of cycles while the sealed battery cell is compressed, and discharge the sealed battery cell for the plurality of cycles while the sealed battery cell is uncompressed, or
charge the sealed battery cell for the plurality of cycles while the sealed battery cell is uncompressed, and discharge the sealed battery cell for the plurality of cycles while the sealed battery cell is compressed.

Assignees

• Wisk Aero Llc

Inventors

• Li Chen
• Herring Patrick K

Classifications

• Y02E60/50

  Fuel cells · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M10/058

  Construction or manufacture · CPC title

• H01M10/04

  Construction or manufacture in general (H01M10/058, H01M10/12, H01M10/28, H01M10/38 take precedence) · CPC title

• H01M10/0566 Primary

  Liquid materials · CPC title