Electrolyte solution for non-aqueous secondary battery and non-aqueous secondary battery using same

Provided is an electrolyte solution with which charge/discharge cycle characteristics can be improved in a non-aqueous secondary battery that uses a transition metal sulfide that does not contain lithium as a positive electrode active material. An electrolyte solution for a non-aqueous secondary battery in which a transition metal sulfide that does not contain lithium is used as a positive electrode active material, the electrolyte solution containing an organic solvent, lithium bis (trifluoromethanesulfonyl) imide (LiTFSI), and an additive, the organic solvent containing a chain carbonate compound. 本发明提供一种电解液，其中，在使用不含锂的过渡金属硫化物作为正极活性物质的非水二次电池中，能够提高充放电循环特性。一种非水二次电池用电解液，其中，所述非水二次电池是使用不含锂的过渡金属硫化物作为正极活性物质的非水二次电池，所述电解液含有：有机溶剂、双(三氟甲磺酰)亚胺锂(LiTFSI)和添加剂，所述有机溶剂包含链状碳酸酯化合物。