Particular embodiments may provide interfacial materials for a solid-state electrolyte interface. In some embodiments, the solid-state electrolyte is argyrodite-based. In some embodiments, the interfacial material may comprise a binary halide, a ternary ha...

An object of the present invention is to provide a separation membrane for a battery, which is excellent in heat resistance, does not expand and shrink depending on a temperature history, has no problem that, even when pressure is applied at a point due to...