Back to results
US 11,908,998 B2Granted
Liquid electrolyte for lithium metal battery
AssigneeApple Inc.
InventorsAlan A. Ritchie, Bernd Jurgen Neudecker, Karl M. Brown, Andrew Basile
Life of this patent
Estimating the term…
Abstract
Liquid electrolytes for a lithium metal battery comprise an aprotic solvent, an ionic liquid, a lithium salt, 8 mol % to 30 mol % hydrofluoroether and up to 5 mol % additives. A molar ratio of the hydrofluoroether to the lithium salt is 0.22:1 to 0.83:1. The liquid electrolytes achieve at least a 50% improvement in cycle life over conventional electrolytes, extend capacity retention and delay increases in internal resistance.
Claims10
A liquid electrolyte for a lithium metal battery, having the following composition:
- LiF SI;
- PYR13FSI;
- DMC;
- and
- 13 mol %-21 mol % BTFE, wherein a molar ratio of BTFE to LiFSI is 0.22:1 to 0.83:1, a molar ratio of BTFE to DMC is 0.1:1 to 1:1, and a molar ratio of BTFE to a total of DMC and PYR13FSI is 0.15:1 to 0.5:1.
2 more elements
Dependencies are inferred from the claim text.