Secondary battery electrolyte and preparation method thereof, secondary battery and electronic equipment

The secondary battery electrolyte provided by the embodiment of the invention comprises an electrolyte salt, an organic solvent and a flame retardant, and the flame retardant comprises pentafluorocyclotriphosphazene, tetrafluorocyclotriphosphazene and trifluorocyclotriphosphazene. According to the electrolyte, pentafluorocyclotriphosphazene, tetrafluorocyclotriphosphazene and trifluorocyclotriphosphazene are simultaneously added as flame retardants, so that the electrolyte is endowed with excellent flame retardance, and the battery has high safety performance and good electrochemical performance. The embodiment of the invention also provides a secondary battery with the secondary battery electrolyte and electronic equipment. 本申请实施例提供的二次电池电解液，包括电解质盐、有机溶剂和阻燃剂，其中，所述阻燃剂包括五氟环三磷腈、四氟环三磷腈和三氟环三磷腈。该电解液同时添加了五氟环三磷腈、四氟环三磷腈和三氟环三磷腈作阻燃剂，赋予电解液优良的阻燃能力，使电池兼具高安全性能和良好电化学性能。本申请实施例还提供了带有上述二次电池电解液的二次电池以及电子设备。