Novel electrolyte for lithium-ion batteries

A battery comprising:

• an anode;
• where the anode comprises an anode current collector and an anode active layer;
• where the anode active layer comprises a lithiated silicon oxide or a combination of lithiated silicon oxide and carbon;
• where the lithiated silicon oxide or the combination of lithiated silicon oxide and carbon are present in an amount of 20 wt % or greater, based on a total weight of the anode active layer.
• a cathode;
• where the cathode comprises a cathode current collector and a cathode active layer;
• a separator disposed between the anode and the cathode;
• and
• an electrolyte;
• where the electrolyte comprises a lithium salt and a cosolvent;
• where the cosolvent comprises a cyclic carbonate-containing solvent and a linear carbonate-containing solvent.

A method of manufacturing a lithium-ion battery comprising:

• stacking together an anode, a cathode and a separator;
• where the separator is disposed between anode and cathode;
• where the anode comprises an anode active layer that comprises a lithiated silicon oxide or a combination of lithiated silicon oxide and carbon in an amount of 20 wt % or greater, based on a total weight of the anode active layer;
• contacting the anode and cathode with an anode terminal and a cathode terminal respectively;
• placing the anode and the cathode in a pouch;
• laminating the pouch with the anode, cathode and separator disposed therein at a temperature of 60 to 85° C. to form a laminate;
• and
• disposing an electrolyte in the pouch to form the lithium-ion battery;
• where the electrolyte comprises lithium salt and a cosolvent;
• where the cosolvent comprises a cyclic carbonate-containing solvent and a linear carbonate-containing solvent.