FILM CAPACITOR Russian patent published in 2019 - IPC H01G11/26 H01G11/38 H01G9/48 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrochemical capacitor. Disclosed capacitor comprises a stack of multilayer electrodes deposited on a roll of a nonwoven porous nanofiber material. On said substrate there is a dielectric layer made from natural oxides of metal with thickness of 100–300 nm, functional layer of non-magnetic metal with carbon in quantitative ratio of metal to carbon of 1:3, by thickness exceeding dielectric layer, and from above electroconductive layer in form of electrode paste containing lithium salts with solvent, carbon filler and thickener, wherein the minimum size of the particles of the carbon filler exceeds the diameter of the pores of the non-woven material made from polyaniline, polyethylene or fluoroplastic fibres with diameter of 150–200 nm. Substrate of nonwoven nanofiber material has thickness of 20–30 mcm, specific weight of 9–32 g/m², volume porosity 55–75 % and pore diameter less than 450 nm. Magnesium, titanium or aluminium is used as non-magnetic metal. Layer of metal exceeds thickness of dielectric layer by 5–8 times. In electrode paste lithium salt and carbon filler are taken at weight ratio of 1:1. Multilayer electrodes are assembled into a double stack wherein substrates from non-woven nanofibre material with dielectric adjoin each other to form a separator.

EFFECT: high reliability of operation of the capacitor in high temperature conditions, as well as reduced explosion safety thereof, while maintaining capacitive characteristics, is the technical result of the invention.

7 cl, 3 dwg