Preparation method of composite polyaniline solid electrolyte membrane

The invention relates to the technical field of lithium batteries, in particular to a preparation method of a composite polyaniline solid electrolyte membrane. The preparation method comprises the following steps of adding polyoxyethylene into a salicylic acid solution, adding aniline and ammonium persulfate to perform stirring, performing standing and centrifuging, and performing drying to obtainpowder A; preparing sodium hydroxide and lithium hydroxide into a mixed solution, performing stirring and refluxing on n-butanol and catechol, performing refluxing on dichlorotriethylene glycol, adding concentrated hydrochloric acid to perform standing, extracting a mixed solution of n-heptane and diethyl ether, performing filtering, placing filtrate in an ice salt bath, stirring a mixed solutionof chloroform and chlorosulfonic acid, performing heating for reaction, and performing drying to obtain powder B; and performing blow-drying treatment on the powder A, performing low-pressure evaporation on the powder B to fo