METHOD FOR PRODUCING AN ELECTRODE OF A LITHIUM-ION BATTERY

• US 20170033363A1
• Filed: 07/29/2016
• Published: 02/02/2017
• Est. Priority Date: 07/31/2015
• Status: Abandoned Application

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Verma, Pallavi, Netz, Andreas, Hippchen, Silvan
• Application Number:
  US15/223,800
• Publication Number:
  US 20170033363A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01M 10/049 Processes for forming or storing electrodes in the battery container
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/0562 Solid materials
• CPC Class Codes: H01M 10/058 Construction or manufacture
• CPC Class Codes: H01M 2004/027 Negative electrodes
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H01M 4/0404 by coating on electrode collectors
• CPC Class Codes: H01M 4/0435 Rolling or calendering
• CPC Class Codes: H01M 4/1393 of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
• CPC Class Codes: H01M 4/1395 of electrodes based on metals, Si or alloys
• CPC Class Codes: H01M 4/362 Composites
• CPC Class Codes: H01M 4/364 as mixtures
• CPC Class Codes: H01M 4/386 Silicon or alloys based on silicon
• CPC Class Codes: H01M 4/58 of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
• CPC Class Codes: H01M 4/587 for inserting or intercalating light metals
• CPC Class Codes: H01M 4/62 Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
• CPC Class Codes: H01M 4/628 Inhibitors, e.g. gassing inhibitors, corrosion inhibitors
• CPC Class Codes: H01M 4/661 Metal or alloys, e.g. alloy coatings H01M4/669 take precedence
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries

Abstract

A method for producing an electrode of a lithium-ion battery having the steps of providing a precursor including an electrode active material and LiF, of providing a metal foil and of joining the precursor and the metal foil. Furthermore, a method for producing a lithium-ion battery is provided as well as electrodes and lithium-ion batteries that are producible according to the method.

Claims

1. A method for producing an electrode of a lithium-ion battery, comprising:

(a) providing a precursor including an electrode active material and LiF;

(b) providing a metal foil; and

(c) joining the precursor and the metal foil.

2. The method as recited in claim 1, wherein in step (a) first a dry mass is provided, which contains at least the electrode active material and LiF, and the dry mass is processed to form the precursor.

3. The method as recited in claim 2, wherein the processing of the dry mass into the precursor occurs by laminating the dry mass using a first sheeting calendar.

4. The method as recited in claim 1, wherein in step (c), the precursor and the metal foil are laminated by a second sheeting calendar.

10. The method as recited in claim 1, wherein the electrode active material contains silicon or a composite material including silicon and carbon.

14. The method as recited in claim 1, wherein the electrode is an anode of the lithium-ion battery.

5. A method for producing a lithium-ion battery, comprising:

producing an electrode of the lithium-ion battery by providing a precursor including an electrode active material and LiF, providing a metal foil, and joining the precursor and the metal foil;

processing the electrode together with a counter-electrode and an electrolyte to form the lithium-ion battery; and

carrying out a formation of the lithium-ion battery, in which an SEI layer is formed at least partially by accretion of the LiF processed in the electrode.

11. The method as recited in claim 5, wherein the electrode active material contains silicon or a composite material including silicon and carbon.

15. The method as recited in claim 5, wherein the electrode is an anode of the lithium-ion battery.

6. An electrode of a lithium-ion battery, the electrode being produced by providing a precursor including an electrode active material and LiF, providing a metal foil, and joining the precursor and the metal foil.

12. The electrode as recited in claim 6, wherein the electrode active material contains silicon or a composite material including silicon and carbon.

16. The electrode as recited in claim 6, wherein the electrode is an anode of the lithium-ion battery.

7. A lithium-ion battery which is produced by producing an electrode of the lithium-ion battery by providing a precursor including an electrode active material and LiF, providing a metal foil, and joining the precursor and the metal foil, processing the electrode together with a counter-electrode and an electrolyte to form the lithium-ion battery, and carrying out a formation of the lithium-ion battery, in which an SEI layer is formed at least partially by accretion of the LiF processed in the electrode.

8. The lithium-ion battery as recited in claim 7, wherein the battery has a formation loss of the capacity of less than 30%.

9. The lithium-ion battery as recited in claim 8, wherein the formation loss of the capacity is less than 5%.

13. The lithium-ion battery as recited in claim 7, wherein the electrode active material contains silicon or a composite material including silicon and carbon.

17. The lithium-ion battery as recited in claim 7, wherein the electrode is an anode of the lithium-ion battery.