Coatings, Materials and Technologies for Solid-State Batteries

The project plans to create a solid-state battery with a lithium anode (projected specific energy at 350 Wh / kg), for which detailed studies of processes related to the production and application of functional metal oxide coatings (study of processes at the interface of the electrode-electrolyte phases), synthesis of a solid electrolyte system Li1+xAlxTeyGe2−(x+y)(PO4)3 (LAGP). Layered structures of lithium transition metal oxides with a high nickel content will be used as the cathode. For the first time, solid electrolytes based on Li1+xAlxTeyGe2−(x+y)(PO4)3 ions will be synthesized, their ionic conductivity determined, and the possibility of their use in lithium batteries demonstrated. Special attention will be paid to the study of lithium-ion conductivity depending on the amorphous-crystalline state at the grain boundaries of the phases during crystallization of synthesized glasses of solid electrolytes using transmission electron microscopy. For the first time, the process of applying the method of molecular layering of functional coatings of mixed metal oxides of complex composition Me1-Me2-O (where, Me – Al, La, Zn) to a solid electrolyte of the LAGP type will be studied to improve the wettability and chemical stability of lithium anode/electrolyte interfaces. As a result of the research, the effect of the composition and thickness of the coating on the electrochemical characteristics of the lithium electrode and battery life will be determined.