Low-temperature electrolyte for low-temperature battery, prefabricated alcohol dry-method negative electrode, manufacturing method and low-temperature aqueous zinc-manganese secondary battery

The invention relates to a low-temperature electrolyte suitable for a low-temperature battery, a prefabricated alcohol dry-method negative electrode, a manufacturing method and a low-temperature aqueous zinc-manganese secondary battery. The low-temperature electrolyte comprises trifluoromethanesulfonic acid, a zinc salt suspension, a manganese sulfate solution and an alcoholic solution, and alcohols can enter a solvation structure of zinc ions in the aqueous solution and form hydrogen bonds with water molecules, so that the viscosity and the freezing point of the electrolyte are reduced. According to the prefabricated alcohol dry method negative electrode, supersonic jet gas is used for spraying and drawing polytetrafluoroethylene, a three-dimensional space conductive network is constructed by the polytetrafluoroethylene, zinc powder, a conductive agent, a toughening conductive agent, a cation slow-release agent and a hydrogen evolution inhibitor, and 1-8% of an alcohol solvent is reserved in the drying proce