Abstract: A sensor element comprising a substrate made of a compound oxide of the perovskite type, the compound oxide having the formula A.sub.1-x A'.sub.x B.sub.1-y B'.sub.y O.sub.3 in which A represents a trivalent element selected from the group consisting of La, Ce, Pr and Nd, A' represents a divalent element selected from the group consisting of Ca, Sr and Ba, B represents equal amounts of trivalent and tetravalent Co, B' represents a tetravalent element selected from the group consisting of Fe, Mn, V and Ti, x has a value ranging from (0.6) to (0.95) and y has a value ranging from (0.2) to (0.9) with the proviso that x must equal 1/2(1+y).

Abstract: A catalyst for converting harmful reductive and oxidative gases in exhaust gases into innoxious gases is provided. The catalyst essentially consists of a perovskite oxide represented by the general formulaLa.sub.(1-x)/2 Sr.sub.(1+x)/2 Co.sub.1-x Me.sub.x O.sub.3in which Me is an element such as Fe, Mn, Cr, V or Ti and x is a number of from 0.15 to 0.90. In order to fabricate durable catalysts, the catalytic component is supported on heat-resistant expanded metal or inorganic fiber meshworks or hollows cylinders of heat-resistant anti-corrosion metals or refractory materials with or without catalyst-bearing pellets.

Abstract: A solid state electric double layer capacitor comprisinga polarization electrode,a non-polarization electrode, anda solid electrolyte disposed at least between the polarization electrode and the non-polarization electrode,the polarization electrode being a mixture of carbon and the solid electrolyte, mixed with each other in a predetermined ratio,the non-polarization electrode being another mixture of the solid electrolyte and a composition containing Cu and a substance selected from a group consisting of Cu.sub.2 S and TiS.sub.2, andthe solid electrolyte having a chemical composition of K.sub.x Rb.sub.1-x Cu.sub.4 I.sub.y Cl.sub.5-y (0.1.ltoreq.x .ltoreq.0.25, 1.25.ltoreq.y.ltoreq.1.67).

Abstract: A solid state double layer capacitor comprising at least a polarization electrode and a counter electrode comprising cuprous sulfide and a solid electrolyte, and being superior in potential linearity of the polarization electrode with respect to a supplied charge amount and also in charge storage capability.

Abstract: A solid-state primary cell comprising a lithium anode, an iodine cathode containing a charge transfer complex and a solid lithium iodide electrolyte doped with a 1-normal-alkyl-pyridinium iodide. The anode surface can be coated with LiOH or Li.sub.3 N. The iodine cathode comprises a complex of iodine and 1-normal-alkyl-pyridinium iodide and preferably contains titanium dioxide powder, alumina gel powder or silica gel powder admixed with the complex.

Abstract: A solid-state primary cell comprising a lithium anode, an iodine cathode containing a charge transfer complex and a solid lithium iodide electrolyte doped with a 1-normal-alkyl-pyridinium iodide. The anode surface can be coated with LiOH or Li.sub.3 N. The iodine cathode comprises a complex of iodine and 1-normal-alkyl-pyridinium iodide and preferably contains titanium dioxide powder, alumina gel powder or silica gel powder admixed with the complex.