METHOD OF PRODUCING A THIN FILM CATHODE Russian patent published in 2017 - IPC H01M4/139 H01M4/525 B22F1/02 

FIELD: electricity.

SUBSTANCE: as the initial component, a current-collecting aluminium substrate is selected, which is placed in the thin film depositing chamber, dried in a vacuum for 1-3 hours, and after drying at a temperature of 200-250°C conduct a sequential process of depositing components: an atomic layer of iron oxide (FeO), an atomic layer of manganese oxide (MnO), an atomic layer of lithium oxide (Li₂O), an atomic layer of silicon oxide (SiO₂), using organometallic precursors, before forming an amorphous compound of Li₂Fe_0,5Mn_0,5SiO₄. Next, pulsed heat treatment at a temperature of 600-640°C for 0.1-0.2 seconds, as a result of which a crystalline compound Li₂Fe_0,5Mn_0,5SiO₄. The number of applied sequences is repeated until a thin film single-crystal cathode is formed with a thickness of 100-200 nm.

EFFECT: increase in specific capacity and cyclic stability of lithium-ion batteries.

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