An electrolyte composition contains a propane sultone compound substituted with a specific substituent, a cyclic fluorocarbonate-based compound and a nonaqueous solvent. A secondary battery containing the electrolyte composition is disclosed. The electrolyte composition has excellent SEI film-forming ability and HF-removing ability by containing the cyclic fluorocarbonate-based compound together with the propane sultone compound substituted with a specific substituent, so that the lifespan characteristic and stability at high temperature can be improved.
                            一种电解质组合物,包含一种
丙烷磺酸酯化合物,其被特定的取代基取代,以及一种基于环状
氟碳酸酯的化合物和一种非
水溶剂。公开了一种含有该电解质组合物的二次电池。该电解质组合物通过含有基于环状
氟碳酸酯的化合物和被特定取代基取代的
丙烷磺酸酯化合物,具有优异的
SEI膜形成能力和HF去除能力,从而可以提高寿命特性和高温稳定性。