ELECTRODE OF RADIOISOTOPE POWER SOURCE AND METHOD OF ITS MANUFACTURING Russian patent published in 2024 - IPC G21H1/02 

FIELD: radioisotope power source.

SUBSTANCE: invention is related to an electrode of a radioisotope power source and a method for its manufacturing. The electrode of an autonomous power source based on beta-emitting radionuclides (strontium-90, or nickel-63, or technetium-99, or tritium, or other beta- or alpha-emitting radionuclides) is made by calendering a homogeneous carbon mixture containing 15-25% polytetrafluoroethylene and 75-85% crushed fine composition obtained from, for example, strontium-90 doped with a radionuclide, and polymerized resorcinol-formaldehyde resin in presence of a catalyst (for example, orthophosphoric acid). During the manufacturing of the electrode, the composition is subjected to sequential two-stage heat treatment, including preliminary carbonization in vacuum at 500°C for one hour and subsequent physical activation at 900°C in a carbon dioxide atmosphere for one hour.

EFFECT: increase in the capacity of the autonomous power source electrode, an improvement in the stability of the properties of the carbon electrode of a radioisotope autonomous power source, a reduction in transfer of radioactive substances from the electrode into the electrolyte, and as a consequence an increase in the efficiency of the electrode, as well as an increase in the radiation safety of the source.

2 cl, 2 dwg