FIELD: emissive electronics; cold, heater, and filamentary cathodes for various electronic and ionic devices. SUBSTANCE: electrode has base covered with active material including alloys of alkali and/or alkali-earth metals with solvent-metal whose melting point is higher than that of alkali or alkali-earth metals; upon treatment with oxygen, fluorine, or chlorine active material has in its composition 0.5-50% of non-oxidized alkali or alkali-earth metals. EFFECT: optimized composition of electrode coating. 5 cl, 5 dwg
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