POLYMER SOLID ELECTROLYTE AND ALL SOLID-STATE BATTERY COMPRISING THE SAME

The present disclosure relates to an electrolyte and an all solid-state battery comprising the same. The electrolyte includes a PEO(polyethylene oxide)-based copolymer containing crosslinkable functional groups; and a polar compound, wherein at least a portion of the crosslinkable functional groups forms cross-links with each other, and the PEO-based copolymer forms a three-dimensional network structure, and wherein the polar compound in a gaseous state is contained in the three-dimensional network structure, and satisfies predetermined characteristics.