An orifice plate having orifice openings is interposed between a roller body and a side plate. In a closed region of an outer peripheral surface of the roller body which is covered with a base material, the base material is held on the outer peripheral surface of the roller body under suction by a negative pressure developed in suction holes. In an open region of the outer peripheral surface which is not covered with the base material, the sucking of a gas from an exterior space into the roller body is suppressed because it is difficult for the gas to pass through the orifice openings. This suppresses a reduction in sucking force in the closed region due to the entry of the gas from the open region. The roller body, the orifice plate and the side plate rotate as a unit. This suppresses deterioration of the members due to the slidable movement thereof.

Disclosed is a biphasic electrically conductive perovskite-based mixed oxide of the structure ABO.sub.3 with A=Ba, and B=Co, comprising additionally 5-45 at %, preferably 15 to 30 at %, particularly preferably 25 at % Co.sub.3O.sub.4 (at % Co based on the total number of Co atoms in the perovskite ABO.sub.3 and 0.5 to 3 at %, preferably 1 to 2.5 at %, particularly preferably 2 at % (wherein the at % are referred to the total number of B cations in the perovskite ABO.sub.3) Ti as dopant. Preferably, the mixed oxide has the stoichiometric formula BaCo.sub.1xTi.sub.xO.sub.3:Co.sub.3O.sub.4 with x=0.005 to 0.03, preferably x=0.01 to 0.025, particularly preferably x=0.02, wherein defines the vacancies in the perovskite structure and is in the range of about 0.1 to 0.8, preferably 0.3 to 0.7, particularly preferably about 0.5 to 0.6. Further disclosed are a catalyst and an anode comprising the mixed oxide, the use of the catalyst in alkaline water electrolysis or in metal-air batteries, the use of the mixed oxide for the preparation of an anode for alkaline water electrolysis or metal-air batteries. Further, manufacturing processes for a precursor solution for the mixed oxide and for the inventive anode are disclosed, as well as an amorphous mixed oxide having a Co:Ba ratio of about 2:1 and a TTB (Tetragonal Tungsten-Bronze)-like near structure obtainable by using the mixed oxide according to the invention as catalyst in the oxygen evolution reaction of alkaline water electrolysis, whereby said amorphous product is formed by leaching out Ba.

The present invention is a catalyst for a solid polymer fuel cell including: catalyst particles of platinum, cobalt and manganese; and a carbon powder carrier supporting the catalyst particles, wherein the component ratio (molar ratio) of the platinum, cobalt and manganese of the catalyst particles is of Pt:Co:Mn=1:0.06 to 0.39:0.04 to 0.33, and wherein in an X-ray diffraction analysis of the catalyst particles, the peak intensity ratio of a CoMn alloy appearing around 2=27 is 0.15 or less on the basis of a main peak appearing around 2=40. It is particularly preferred that the catalyst have a peak ratio of a peak of a CoPt.sub.3 alloy and an MnPt.sub.3 alloy appearing around 2=32 of 0.14 or more on the basis of a main peak.

The metal porous body according to one aspect of the present invention has a framework of a three-dimensional network structure. The framework is hollow inside and is formed of a metal film, and the metal film contains titanium metal or titanium alloy as the main component.

There is provided a method of manufacturing a membrane electrode assembly that has an electrode catalyst layer formed on a surface of an electrolyte membrane. The electrode catalyst layer formed in the membrane electrode assembly is produced by a drying process that dries a catalyst ink which includes catalyst-supported particles having a catalyst metal supported thereon, a solvent and an ionomer, at a predetermined temperature. The catalyst ink includes a plurality of different solvents having different boiling points. The predetermined temperature is set to be lower than the boiling point of the solvent having the lowest boiling point among the plurality of different solvents.

The invention includes a method of making a catalytic electrode for a metal-air cell in which a carbon-catalyst composite is produced by heating a manganese compound in the presence of a particulate carbon material to form manganese oxide catalyst on the surfaces of the particulate carbon, and then adding virgin particulate carbon material to the carbon-catalyst composite to produce a catalytic mixture that is formed into a catalytic layer. A current collector and an air diffusion layer are added to the catalytic layer to produce the catalytic electrode. The catalytic electrode can be combined with a separator and a negative electrode in a cell housing including an air entry port through which air from outside the container can reach the catalytic electrode.

A method for manufacturing a catalyst for fuel cell includes: providing or receiving magnesium porphyrin-containing powder; mixing the magnesium porphyrin-containing powder with a carbon-containing carrier powder to form a first mixture, and performing a thermal treatment to pyrolyze the first mixture to form the catalyst for fuel cell. A catalyst for fuel cell is also provided herein.

A roll-to-roll continuous coater for CCM preparation, and a coiled material connection method are provided. The coater has a coiled material connection mechanism that includes an upper rack (2) and a lower rack (3). A vacuum suction plate I (2-3) provided with a driving device for achieving displacement and a vacuum suction plate II (3-1) provided with a solid glue spraying device (3-3) are respectively disposed on the bottom of the upper rack (2) and the top of the lower rack (3). An optical fiber sensor I (2-4) and an optical fiber sensor II (3-2) are respectively disposed in the vacuum suction plate I (2-3) and the vacuum suction plate II (3-1). A tension detection device (4) is disposed between the lower rack (3) and a driving roller assembly (1).

According to various aspects of the present disclosure, a catalyst for rechargeable energy storage devices having a first transition metal and a second transition metal, wherein the first and second transition metals are formed on carbon nanotubes, the carbon nanotubes are doped with nitrogen and phosphorous, wherein the carbon nanotubes have edges and interlayer spaces and are axially aligned, and the first and second transition metals form bimetal centers, wherein the bimetal centers may be uniformly distributed catalytic active sites located at the edges or the interlayer spaces of the carbon nanotubes providing intercalated layers. The present FeCoNPCNTs are a morphology-dependent catalyst that provides effective performance for bifunctional oxygen reduction reaction and oxygen evolution reaction in metal-air-cells and fuel cells.

A positive electrode of a lithium-sulfur battery including maghemite as an additive and a lithium-sulfur battery including the same. The maghemite obtained by heat treatment of lepidocrocite adsorbs lithium polysulfide (LiPS) generated from a lithium-sulfur battery, thereby improving the charging/discharging efficiency and capacity of the battery, as well as increasing the life of the battery.