Electrolyte formulations for lithium ion batteries

Patent metadata

Field	Value
Publication number	US-9653755-B2
Application number	US-201514746737-A
Country	US
Kind code	B2
Filing date	Jun 22, 2015
Priority date	Jun 22, 2015
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

Electrolyte solutions including additives or combinations of additives that provide low temperature performance and high temperature stability in lithium ion battery cells.

First claim

What is claimed is:

1. A rechargeable battery, comprising:
a cathode comprising a lithium ion intercalating material, wherein discharge and recharge of the battery is accomplished by intercalation and de-intercalation of lithium ions into and from the cathode; and
an electrolyte formulation comprising:
an organic solvent;
a lithium salt present at a concentration suitable for conducting lithium ions through the electrolyte formulation; and
an additive salt comprising sodium nitrate or cesium nitrate.

2. The rechargeable battery of claim 1 wherein the additive salt is sodium nitrate and the electrolyte formulation further comprises cesium nitrate as a second additive.

3. The rechargeable battery of claim 1 further comprising tris(trimethylsilyl)phosphate as a second additive.

4. The rechargeable battery of claim 1 further comprising 4-fluorophenyl isocyanate as a second additive.

5. The rechargeable battery of claim 1 further comprising 1,4-butane sultone as a second additive.

6. A rechargeable battery, comprising:
an anode;
a cathode comprising a lithium ion intercalating material, wherein discharge and recharge of the battery is accomplished by intercalation and de-intercalation of lithium ions into and from the cathode; and
an electrolyte formulation comprising:
an organic solvent;
a lithium salt present at a concentration suitable for conducting lithium ions through the electrolyte formulation; and
an additive salt comprising sodium carbonate, or potassium carbonate.

7. The rechargeable battery of claim 6 further comprising lithium bis(oxalato)borate as a second additive.

8. The rechargeable battery of claim 6 further comprising cesium nitrate as a second additive.

9. The rechargeable battery of claim 6 further comprising tris(trimethylsilyl)phosphate as a second additive.

10. The rechargeable battery of claim 6 further comprising trimethylsilyl polyphosphate as a second additive.

Assignees

• Wildcat discovery technologies inc
• Wildcat discovery technologies inc
• Johnson Controls Tech Co

Inventors

• Cheng Gang
• Zhu Ye
• Strand Deidre
• Hallac Boutros
• Metz Bernhard M

Classifications

• H01M10/052 Primary

  Li-accumulators · CPC title

• H01M10/0568

  characterised by the solutes · CPC title

• H01M10/0567 Primary

  characterised by the additives · CPC title

• H01M10/0525

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

• H01M10/056 Primary

  characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes · CPC title