As Lithium ion batteries (LIB) are utilized in wider scale of applications, operation at a wide range of operating temperatures without a penalty to the energy density is desired. Current LIB only produces a fraction of the room temperature capacity when operated at subzero temperatures. Optimization of the electrolyte composition has long been considered a way of improving low temperature battery performance, as the electrolyte dictates the ionic mobility and the stability of the solid electrolyte interface (SEI), which in turn determine the Li ion intercalation kinetics and cycle life of the cell. Different operating temperatures has different demands from the electrolyte. For room temperature performance, formation of a stable solid electrolyte interface is thought to dictate the capacity and the cycle life of a cell. For low temperature performance, Li ion transport properties and charge-transfer polarization may have a dominant effect on cycling performance. Therefore, in this work, a novel electrolyte system was developed that included lithium tetrafluoroborate and methyl acetate for good low temperature performance and different additives were incorporated to this system to improve the room temperature performance by formation of a stable SEI.