LIQUID COMPOSITION, STORAGE CONTAINER, AND APPARATUS AND METHOD FOR PRODUCING SOLID ELECTROLYTE LAYER OR ELECTRODE MIXTURE LAYER

A liquid composition has a solvent, an inorganic solid electrolyte and a dispersant. A solid concentration of the inorganic solid electrolyte in the liquid composition is 20% by mass or higher. The dispersant is soluble in the solvent. A relative permittivity of the solvent at 25° C. is 6.0 or lower.