<p>➀ Researchers from the Electronics and Telecommunications Research Institute (ETRI) have developed a thin solid electrolyte membrane using a dry process. This membrane is significantly thinner than traditional solid electrolyte membranes, enhancing energy density while reducing battery size.</p><p>➁ The new membrane is achieved by fibrillating binder materials under mechanical shear force, resulting in a thickness of just 18µm. This compares favorably to the 1 mm thick membranes commonly used today.</p><p>➂ ETRI plans to further optimize ion conductivity and electrode interface stability. Preliminary tests using a pouch-type cell show promising results, indicating potential for commercial application.</p>