Preparation method and application of mixed ion electrolyte

The invention discloses a preparation method and application of a mixed ion electrolyte, and the preparation method comprises the following steps: soaking a molecular sieve in a single ion electrolyte to obtain a primary mixed solution; removing the molecular sieve in the primary mixed solution to obtain a mixed ion electrolyte; according to the invention, the molecular sieve is innovatively soaked in the single-ion electrolyte to form the mixed-ion electrolyte, the molecular sieve is low in cost, and only a small amount of molecular sieve needs to be soaked in the single-ion electrolyte, so that the raw material cost in the prior art is greatly reduced; moreover, the preparation method does not need the procedures of weighing, mixing, dissolving and the like, the preparation process is simple, the process cost is saved, and the production cost is greatly reduced. In addition, the molecular sieve also has the effect of adsorbing trace moisture in the electrolyte, so that the battery performance is improved. 本