Composition, flame-retardant gel electrolyte, preparation method of flame-retardant gel electrolyte and battery

The invention discloses a composition, a flame-retardant gel electrolyte, a preparation method of the flame-retardant gel electrolyte and a battery, and the composition comprises a silane coupling agent, a multi-fluorine compound and an organic sulfonic acid compound. The silane coupling agent has the characteristics of excellent thermal stability, low flammability and capability of removing trace water, and can be subjected to coupling reaction with lithium metal and hydroxyl bonds on the surface of the active positive electrode to form Li-Si-O and construct a chemical bridge between the electrode and the electrolyte, so that the transmission rate of lithium ions in the electrolyte is effectively improved; the polyfluorinated compound has incombustibility and can form a fluoride-rich solid/electrolyte interface on the surface of the electrode, so that the adverse effect on the interface caused by the addition of phosphate can be improved, and meanwhile, the high interface impedance caused by the deposition o