A lithium battery electrolyte based on a room-temperature phosphonium ionic liquid

The electrolytic properties of a lithium battery electrolyte based on triethyl(2-methoxyethyl)phosphonium bis(trifluoromethylsulfonyl)imide are described. Testing charge-discharge performance of the cell containing the lithium-binary phosphonium ionic liquid electrolyte showed excellent capacity and rechargeability, compared to the cell containing a comparative ammonium ionic liquid electrolyte.