METHOD OF PRODUCING COMPOSITE BASED ON MULTI-WALL CARBON NANOTUBES AND MANGANESE OXIDE Russian patent published in 2024 - IPC C01B32/168 B82B3/00 B82Y40/00 B82Y30/00 H01M4/583 H01M4/50 H01G11/36 

FIELD: production of composite materials.

SUBSTANCE: invention can be used to produce electrode materials for supercapacitors. Disclosed is a method of producing a composite based on multi-wall carbon nanotubes (MWCN) and manganese oxide, in which multi-wall carbon nanotubes are used as a carbon matrix. Multi-wall carbon nanotubes with outer diameter of 10 nm and specific surface area of 360 m²/g are treated in aqueous solution of nitric acid HNO₃ for 5 minutes, followed by washing in distilled water. Multi-wall carbon nanotubes are then mixed with the KMnO₄ precursor powder in a weight ratio of 8:2 and distilled water is added. Obtained solution is held while continuously stirring for 72 hours at room temperature and atmospheric pressure. Obtained composite is then washed with distilled water and dried at pressure of 1 Pa and temperature of 80°C for 10 hours and annealed at temperature of 500°C in an argon atmosphere.

EFFECT: invention enables to obtain highly efficient electrode materials with high specific capacity and stability of electrochemical characteristics.

1 cl, 6 dwg, 2 tbl