Electrolytic solution and lithium-ion battery employing same

The invention belongs to the field of lithium-ion batteries, and particularly relates to an electrolytic solution and a lithium-ion battery employing the same. The electrolytic solution comprises an organic solvent, an electrolyte and additives, wherein the additives include the additive A and the additive B; the additive A is selected from at least one of a sulfoxide compound, a sulfone compound, a sulphite compound, a sulphate compound and methylene methanedisulfonate; the additive B is selected from lithium difluorophosphate or at least one of the compounds as shown in a formula I. According to the electrolyte solution, DC impedance of the fresh lithium-ion battery and the DC impedance of a cycled battery can be reduced. The formula I is as shown in the specification. 本申请属于锂离子电池领域，具体讲，本申请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，添加剂包括添加剂A和添加剂B；添加剂A选自亚砜类化合物、砜类化合物、亚硫酸酯类化合物、硫酸酯类化合物、甲烷二磺酸亚甲酯中的至少种；添加剂B选自二氟磷酸锂或如式Ⅰ所示的化合物中的至少种；本申请的电解液可降低新鲜锂离子电池的直流阻抗和循环后电池的直流阻抗。