Air-Protected Analysis of Specific Surface Area and Density of Solid Electrolytes of All-Solid-State Battery Cells for Improving the Ion Conductivity of Such Electrolytes

Recently, all-solid state battery cells have been attracting close attention from the viewpoints of high output density and safety. Small size (large specific surface area) and high density (absence of spore) of the particles constituting the solid electrolytes (oxides/sulfides) are very important in improving ion conductivity. Meanwhile, since each solid electrolyte involves a risk of carbonate precipitation and the release of hydrogen sulfide when exposed to ambient air, it is essential to conduct an evaluation of the specific surface area and density when not exposed to ambient air.