Electrolytic solution and lithium-ion battery employing same

The invention relates to the field of secondary batteries, in particular to an electrolytic solution and a lithium-ion battery employing the same. The electrolytic solution comprises an organic solvent, an electrolyte and an additive; the organic solvent contains linear carboxylic ester; and the additive contains cyclic diester and sulfate. By the electrolytic solution, the DC internal resistance of the battery after being cycled can be obviously reduced; and the cycle performance of the battery is not affected. 本申请涉及二次电池领域，具体讲，涉及种电解液及使用该电解液的锂离子电池。本申请的电解液包括有机溶剂、电解质和添加剂，有机溶剂包含线性羧酸酯，添加剂中含有环二酯和硫酸酯。本申请的电解液能够明显降低循环后电池的直流内阻，且不影响电池的循环性能。