Solid electrolyte, diaphragm for secondary battery and secondary battery

The invention relates to the technical field of electrochemistry, in particular to a solid electrolyte, a diaphragm for a secondary battery and the secondary battery. The solid electrolyte comprises an inorganic material, the chemical formula of the inorganic material is Li < 4 > W < 1-x > Mo < x > O < 5 >, and x is less than or equal to 0.5. According to the invention, Mo is used for doping the existing Li4WO5 material, Mo is used for doping the Li4WO5 material, and the addition amount of Mo is strictly controlled, so that the material composition and the lattice structure of the solid electrolyte are optimized, an inorganic material with the chemical formula of Li4W1-xMoxO5 is obtained, and the Mo-doped lithium tungstate solid electrolyte has the advantages of high conductivity, wide electrochemical window and low interface impedance, and can be used for preparing the lithium tungstate solid electrolyte. And the safety stability and the service life of the solid-state battery can be effectively improved, an