The present invention is directed to an electric current-producing cell which contains:A cathode having as its cathode-active material one or more compounds selected from:(i) those having the formula:(NH.sub.4).sub.x MoZ.sub.y (1)wherein Z is a chalcogen selected from the group consisting of sulfur, selenium, sulfur-selenium mixtures, sulfur-oxygen mixtures and selenium-oxygen mixtures, wherein x is a numerical value of about 2, and wherein y is a numerical value of about 4;(ii) compounds of the above formula wherein one or more hydrogens is substituted with a radical selected from alkyl radicals having 1 to 20 carbon atoms and alkyl amine radicals having 1 to 20 carbon atoms;(iii) those having the formula:(NH.sub.3 --R--NH.sub.3)MoZ.sub.y (2)wherein R is a methylene radical or a polymethylene radical having 2 to 20 carbon atoms, and wherein Z and y are as defined; and,(iv) the amorphous decomposition products of one or more compounds of subparagraphs (i), (ii) and (iii) resulting from the decomposition thereof below about 350.degree. C.