Abstract: Provided are an organic electrolytic solution and a lithium battery including the organic electrolytic solution, wherein the organic electrolytic solution includes an organic solvent, a lithium salt, a borate compound represented by Formula 1 below, and an ionic metal complex represented by Formula 2 below: wherein R1, R2, and R3 are each independently a hydrogen; a C1-C5 alkyl group substituted or unsubstituted with a halogen; or a C1-C5 cyanoalkyl group substituted or unsubstituted with a halogen, at least one of the R1, R2, and R3 includes a cyanoalkyl group, Me is an element selected from the group consisting of transition metals and Groups 13 to 15 elements of the periodic table, M is a metal ion, a is an integer from 1 to 3, b is an integer from 1 to 3, s=b/a, p is an integer from 0 to 8, q is 0 or 1, r is an integer from 1 to 4, X1 and X2 are each independently O, S, or NR6, R4 and R6 are each independently a halogen, a C1-C5 alkyl group substituted or unsubstituted with a halogen, or a C1-C5 aryl

Abstract: An electrolyte includes an organic solvent and a cyclic ester compound that is substituted with a sulfonate group.

Abstract: A silicone-containing compound is an additive for a lithium secondary battery electrolyte for improving high-temperature lifetime characteristics and/or high-temperature stability of a lithium secondary battery. An electrolyte for a lithium secondary battery includes the silicon-containing compound. A lithium secondary battery includes the electrolyte. A method of preparing the silicon-containing compound is also provided.

Abstract: An electrolyte includes an organic solvent and a cyclic ester compound that is substituted with a sulfonate group.

Abstract: Provided are an organic electrolytic solution and a lithium battery including the organic electrolytic solution, wherein the organic electrolytic solution includes an organic solvent, a lithium salt, a borate compound represented by Formula 1 below, and an ionic metal complex represented by Formula 2 below: wherein R1, R2, and R3 are each independently a hydrogen; a C1-C5 alkyl group substituted or unsubstituted with a halogen; or a C1-C5 cyanoalkyl group substituted or unsubstituted with a halogen, at least one of the R1, R2, and R3 includes a cyanoalkyl group, Me is an element selected from the group consisting of transition metals and Groups 13 to 15 elements of the periodic table, M is a metal ion, a is an integer from 1 to 3, b is an integer from 1 to 3, s=b/a, p is an integer from 0 to 8, q is 0 or 1, r is an integer from 1 to 4, X1 and X2 are each independently O, S, or NR6, R4 and R6 are each independently a halogen, a C1-C5 alkyl group substituted or unsubstituted with a halogen, or a C1-C5 ary

Abstract: Disclosed are an electrolyte for a rechargeable lithium battery including a lithium salt, a non-aqueous organic solvent, and an additive, wherein the additive includes a compound represented by Chemical Formula 1, and rechargeable lithium battery including the same. The structure and definition of the above Chemical Formula 1 are the same as in the specification.

Abstract: A silicone-containing compound is an additive for a lithium secondary battery electrolyte for improving high-temperature lifetime characteristics and/or high-temperature stability of a lithium secondary battery. An electrolyte for a lithium secondary battery includes the silicon-containing compound. A lithium secondary battery includes the electrolyte. A method of preparing the silicon-containing compound is also provided.

Abstract: An electrolyte for lithium secondary batteries includes a lithium salt, a nonaqueous organic solvent, and a compound represented by Formula 1 below as an additive: where R1, R2, R3, R4, and R5 in Formula 1 are defined as those specified in the specification.