Abstract: A method of manufacturing a photo-rechargeable storage battery includes cutting a filter paper of glass fiber as a base material in a preselected shape to provide a cut filter paper; washing the cut filter paper; coating a polypyrrole film on at least a portion of a surface of the cut filter paper; and carrying a gel of poly-tungustic acid having a form of clusters on at least a portion of the glass fiber coated with the polypyrrole film thereby forming a composite electrode on the filter paper.

Abstract: A high-temperature YBa.sub.2 Cu.sub.3 O.sub.x superconducting sintered body is produced through wet grain-coating process in which starting grains are soaked in SnI.sub.4 solution, pressed after the removal of solvent and then sintered at a given temperature, and has a critical current density of at least 500 A/cm.sup.2 at 77 K.

Abstract: A composite electrode for a photo-rechargeable storage battery includes a filter paper of glass fiber as a base material; a polypyrrole film coated on a surface of the filter paper to provide a conductive polymer; and a gel of polytungustic acid provided on the polypyrrole film in the form of a cluster to provide a photo-catalytic property. The polypyrrole film may be vapor phase polymerized and coated onto a surface of the filter paper and the gel of polytungustic acid may be vapor phase coated onto the polypyrrole film in the form of a cluster. Thus, all electrode manufacturing steps can be carried out in the vapor phase so that manufacturing of such an electrode having a very large specific surface area is practical and large electrode areas may be manufactured.

Abstract: A method for producing high-temperature superconducting ceramic material through mechanical orientation including mixing starting materials in powdered form in proportions effective to produce a high-temperature superconducting oxide ceramic having anisotropic crystal grains and shaping the mixture. Next, the shaped mixture is calcined at a temperature ranging from 600.degree. to 900.degree. C. and fired at a temperature higher than 1,000.degree. C. in an oxygen atmosphere for a time effective to produce a superconducting oxide ceramic having crystal grains. According to the invention, the superconductive oxide ceramic is then pulverized into particles having either a plate-like form or a needle-like form based on the anisotropic form of the crystal grains. Particles of a selected size are placed into a vessel and vibrated with an acoustic vibrator means under conditions effective to cause the pulverized particles to turn toward a common preferred orientation to provide oriented particles.