Semi-solid electrodes with a polymer additive

Patent metadata

Field	Value
Publication number	US-12199240-B2
Application number	US-202318227816-A
Country	US
Kind code	B2
Filing date	Jul 28, 2023
Priority date	Jul 19, 2013
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

Embodiments described herein relate generally to electrochemical cells having semi-solid electrodes that include a gel polymer additive such that the electrodes demonstrate longer cycle life while significantly retaining the electronic performance of the electrodes and the electrochemical cells formed therefrom. In some embodiments, a semi-solid electrode can include about 20% to about 75% by volume of an active material, about 0.5% to about 25% by volume of a conductive material, and about 20% to about 70% by volume of an electrolyte. The electrolyte further includes about 0.01% to about 1.5% by weight of a polymer additive. In some embodiments, the electrolyte can include about 0.1% to about 0.7% of the polymer additive.

First claim

The invention claimed is:

1. A semi-solid electrode, comprising:
an ion-storing solid phase material in an electrolyte, the electrolyte including about 0.01% to about 1.5% by weight of a polymer additive, wherein the semi-solid electrode does not include a binder.

2. The semi-solid electrode of claim 1 , wherein the electrolyte includes a non-aqueous liquid electrolyte.

3. The semi-solid electrode of claim 1 , comprising:
about 20% to about 70% by volume of an electrolyte.

4. The semi-solid electrode of claim 1 , wherein the semi-solid electrode is a semi-solid anode, the semi-solid anode further including about 1% to about 30% by volume of a high capacity material.

5. The semi-solid electrode of claim 1 , wherein the polymer additive is a gel-polymer additive.

6. The semi-solid electrode of claim 5 , wherein the gel polymer additive includes at least one of a physically cross-linked gel polymer additive and a chemically cross-linked gel polymer additive.

7. The semi-solid electrode of claim 5 , wherein the gel polymer additive includes at least one of an acrylate group and a methacrylate group.

8. The semi-solid electrode of claim 1 , wherein the polymer additive includes a conductive polymer.

9. The semi-solid electrode of claim 1 , wherein the polymer additive includes a block co-polymer.

10. The semi-solid electrode of claim 1 , wherein the polymer additive is carboxy methyl cellulose.

11. An energy storage device, comprising the semi-solid electrode of claim 1 .

12. A semi-solid electrode, comprising:
an ion-storing solid phase material in an electrolyte, the electrolyte including about 0.01% to about 1.5% by weight of a rheology modifying additive, wherein the semi-solid electrode does not include a binder.

13. The semi-solid electrode of claim 12 , wherein the rheology modifying additive includes a polymer additive.

14. The semi-solid electrode of claim 12 , comprising:
about 20% to about 70% by volume of an electrolyte.

15. An energy storage device, comprising the semi-solid electrode of claim 12 .

Assignees

• 24M Tech Inc

Inventors

• Tan Taison
• Ota Naoki
• Disko Jeffry

Classifications

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M2300/0085

  Immobilising or gelification of electrolyte · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M4/624

  Electric conductive fillers · CPC title