Initiator-free solid-state battery as well as preparation method and application thereof

The invention discloses an initiator-free solid-state battery as well as a preparation method and application thereof, and relates to the technical field of solid-state batteries. The method comprises the following steps: injecting a part of carbonate-based electrolyte into a battery cell for formation and charging, and then injecting a pre-solid solution formed by a micromolecular monomer and the carbonate-based electrolyte into the charged battery cell to solidify the electrolyte in the battery. The preparation process provided by the invention has the following advantages: formation is firstly carried out to form the stable SEI film, and then curing is carried out, so that compared with a traditional mode of first solidification and then formation, gas production in the SEI film forming process can be remarkably reduced, and the cycle life of the battery is favorably prolonged; according to the invention, polymerization of the micromolecular monomer can be initiated under the condition of not adding an ini