The invention discloses a lead-
oxygen-
silicon composite
solid electrolyte material and a preparation method of a lead-
oxygen-
silicon battery, and relates to the technical field of
solid-state batteries, the material comprises the following components by weight: 15-30 parts of a lead-
oxygen compound; 40 to 60 parts of a mesoporous
silicon substrate; 1-5 parts of a
rare earth element
dopant; 0.5-3 parts of an
alkaline earth metal dopant; the lead-
oxygen compound is compounded to serve as an
ion conduction core, the
rare earth element and the
alkaline earth metal doping agent are matched to form a synergistic
system, the
ion conduction environment can be optimized, the
ion migration efficiency can be improved, free lead ions can be anchored through the chemical effect, lead ion
dissolution is greatly reduced, and the lead-ion
conductivity is improved. The
environmental protection property and the ion conduction capability are considered; and meanwhile, a
hierarchical porous structure is constructed by virtue of a mesoporous silicon substrate, so that the
lead oxide compound is loaded in order in a nano form, a pore channel is accurately filled with a
polymer phase, a continuous and stable ion conduction path is formed, and the problems of high
interface impedance and
discontinuous conduction path of the traditional
electrolyte are effectively solved. [1] The synergistic compounding of the
rare earth element and the
alkaline earth metal dopant in the patent is the core innovation point, the multi-stage material is only used as the auxiliary innovation, and when an embodiment is written, only the contrast of the core innovation point needs to be written, and the contrast does not need to be written by using the multi-stage material.