An electrolyte for a lithium-ion battery, comprising: a primary lithium salt; and an organic compound composition comprising fluoroethylene carbonate, vinylene carbonate, at least one ester (402; 404; 406; 408; 410; 412; 414; 416; 418; 420; 422; 424; 426), and a nitrile additive composition comprising at least one nitrile compound (602; 604; 606; 608; 610; 612; 614; 616; 618; 620; 622; 624; 626; 628; 630; 632; 634; 636; 638; 640; 642; 644; 646; 648; 650; 652; 654; 656; 658; 660; 662; 664; 672; 674; 676); wherein a mole fraction of the NAC in the electrolyte is in a range of 0.1 mol. % to 2.0 mol. %; and wherein a mole fraction of the at least one ES in the electrolyte is at least 35 mol. %; wherein the at least one nitrile compound is represented by a formula: each of R 1 and R 2 represents hydrogen, (a) each of R 3, R 4, R 5, and R 6 independently represents hydrogen, C 1-6 alkyl, C 3-6 cycloalkyl, C 2-6 alkenyl, or C 2-6 alkynyl, and/or (b) each of R 3 and R 4 taken together (R 3 +R 4), and R 5 and R 6 taken together (R 5 +R 6) represents C 3-6 cycloalkyl; X represents C 1-6 alkylene; Y 1 represents O; each of Y 2 and Y 3 independently represents O or a single C-C bond; each of n 1 and n 3 independently represents an integer number between 0 and 10; each of a and b represents an integer number of 1; and wherein: c represents 0, Y 2 represents a single C-C bond, n 1 represents 2, and n 2 represents 0, or c represents 1, each of Y 2 and Y 3 represents O, each of n 1, n 2, and n 3 represents 2, and each of R 3, R 4, R 5, and R 6 represents hydrogen. a primary lithium salt; and an organic compound composition comprising fluoroethylene carbonate, vinylene carbonate, at least one ester (402; 404; 406; 408; 410; 412; 414; 416; 418; 420; 422; 424; 426), and a nitrile additive composition comprising at least one nitrile compound (602; 604; 606; 608; 610; 612; 614; 616; 618; 620; 622; 624; 626; 628; 630; 632; 634; 636; 638; 640; 642; 644; 646; 648; 650; 652; 654; 656; 658; 660; 662; 664; 672; 674; 676); wherein a mole fraction of the NAC in the electrolyte is in a range of 0.1 mol. % to 2.0 mol. %; and wherein a mole fraction of the at least one ES in the electrolyte is at least 35 mol. %; wherein the at least one nitrile compound is represented by a formula: each of R 1 and R 2 represents hydrogen, (a) each of R 3, R 4, R 5, and R 6 independently represents hydrogen, C 1-6 alkyl, C 3-6 cycloalkyl, C 2-6 alkenyl, or C 2-6 alkynyl, and/or (b) each of R 3 and R 4 taken together (R 3 +R 4), and R 5 and R 6 taken together (R 5 +R 6) represents C 3-6 cycloalkyl; X represents C 1-6 alkylene; Y 1 represents O; each of Y 2 and Y 3 independently represents O or a single C-C bond; each of n 1 and n 3 independently represents an integer number between 0 and 10; each of a and b represents an integer number of 1; and wherein: c represents 0, Y 2 represents a single C-C bond, n 1 represents 2, and n 2 represents 0, or c represents 1, each of Y 2 and Y 3 represents O, each of n 1, n 2, and n 3 represents 2, and each of R 3, R 4, R 5, and R 6 represents hydrogen. c represents 0, Y 2 represents a single C-C bond, n 1 represents 2, and n 2 represents 0, or c represents 1, each of Y 2 and Y 3 represents O, each of n 1, n 2, and n 3 represents 2, and each of R 3, R 4, R 5, and R 6 represents hydrogen.