| abstract |
In the present invention, at least 70% by weight or more of an inorganic absorbent particle is added to a polymer matrix in preparing an electrolyte membrane and / or a solid electrolyte having a microporous structure for a secondary battery, such as in a battery assembly process such as lamination or pressing. The porous structure is not largely destroyed to maintain the absorbency and ionic conductivity of the solid electrolyte membrane to the liquid electrolyte. In addition to the microporous structure, the absorbent particles contained in a specific content or more enhance the ability to absorb the liquid electrolyte and, in particular, serve as a structure for improving the mechanical strength of the electrolyte membrane and / or the solid electrolyte. Therefore, it has the characteristic that the excellent ion conductivity can be maintained as it is even after battery assembly. |