A solid electrolyte material comprises Li, T, X and A wherein T is at least one of P, As, Si, Ge, Al, and B; X is one or more halogens or N; A is one or more of S and Se. The solid electrolyte material has peaks at 17.8°±0.75° and 19.2°±0.75° in X-ra...

Coated cathode active materials include a cathode active material that is coated by a hydroxide-containing material, such as a metal hydroxide. The coated cathode active materials may be incorporated into electrochemical cells, including solid-state batter...

Systems and methods of producing a solid-state battery cell using an isostatic press system to apply a substantially uniaxial load on the flat surfaces of the cell, while limiting or eliminating the pressure applied to the sides and outside of the cell. Th...