Granted Patent B2

US 9,653,755 · App. 14/746,737 · Granted May 16, 2017

Abstract

Claims (21)

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.

Assignments (8)