In article number 1900269, Guofeng Jia, Guanglei Cui, and co‐workers combine self‐synthesized lithium trifluoro(perfluoro‐tert‐butyloxyl)borate (LiTFPFB) with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) to formulate a 1 m dual‐salt electrolyte, which contains lithium difluorophosphate (LiPO2F2) additive and dominant carbonate solvents with low melting point and high boiling point. This addition dramatically improves cyclability and rate capability of a LiNi0.5Mn0.3Co0.2O2/Li (NMC/Li) battery, unprecedentedly ranging from −40 °C to 90 °C.