The invention provides a
polymer monomer, a non-aqueous composite
solid-state
electrolyte, a composite diaphragm, a
lithium ion battery and a preparation method, the non-aqueous composite
solid-state
electrolyte is obtained by compounding a
polymer with an inorganic
solid-state
electrolyte, the structure of the
polymer monomer is designed, and the non-aqueous composite solid-state electrolyte is prepared on the basis of alkylene
oxide with relatively high
lithium ion conductivity. And
sulfonate /
sulfonyl groups are introduced. The problem of
electrode interface contact of an existing inorganic solid electrolyte is solved, the
oxidation resistance of the polymer is improved, the polarity of the polymer is improved, the dissociation capacity of
lithium ions of the inorganic solid electrolyte is improved, a
transmission channel is established for transmission of the lithium ions, transmission of the lithium ions is promoted, and the service life of the electrolyte is prolonged. The
conductivity and the transference number of lithium ions are increased, so that the electrochemical performance of the battery and the transference capability of the lithium ions are improved, the development of the
lithium ion battery is promoted, and the
lithium ion battery can be applied to the fields of secondary batteries such as lithium
ion batteries (including aqueous lithium ion batteries),
lithium metal batteries and
lithium sulfur batteries.