Abstract: The invention relates to a fuel cell stack assembly (100) and an associated method of assembling the fuel cell stack. The fuel cell stack assembly (100) comprises a plurality of fuel cell assemblies (102) adjacent to one another, a first end plate (104) at a first end (106) of the plurality of fuel cell assemblies, a second end plate (108) at a second opposing end (110) of the plurality of fuel cell assemblies and a tie rod (112) configured to engage the first and second end plates (104, 108) and thereby apply a compression force to the plurality of fuel cell assemblies (102). The tie rod (112) is a unitary component that comprises a first engagement surface (114) that engages with the first end plate (104) and a second engagement surface (116) that engages with the second end plate (108).

Abstract: A fuel cell system includes a fuel cell, an electrical storage device, a fuel-cell-side converter, an electrical-storage-device-side converter, and a controller. The fuel cell is to output fuel cell voltage. The fuel-cell-side converter is configured to apply the fuel cell voltage to a load in a direct connection state or configured to apply a stepped-up fuel cell voltage to the load. The electrical-storage-device-side converter is configured to apply a stepped-up electrical storage device voltage to the load. The controller is configured to control duty of the electrical-storage-device-side converter so that the fuel cell voltage changes smoothly in a case where a state in which the fuel cell voltage is controlled by the fuel-cell-side converter is switched to a state in which the fuel-cell-side converter is set to the direct connection state and the fuel cell voltage is controlled by the electrical-storage-device-side converter.

Abstract: A metal-air battery includes first and second cells, each cell including a negative electrode metal layer, a negative electrode electrolytic film, a positive electrode layer configured to use oxygen as an active material, and a gas diffusion layer, wherein the negative electrode metal layer, the negative electrode electrolytic film, the positive electrode layer, and the gas diffusion layer are sequentially disposed, wherein each cell has an open surface through which at least a portion of the gas diffusion layer is in fluid communication with, outside air, wherein the first and second cells contact each other, and wherein a direction of a first open surface of the first cell is different from a direction of a second open surface of the second cell.

Abstract: A method of fabricating a material having a high concentration of a carbide constituent. The method may comprise adding a carbide source to a biocompatible material in which a weight of the carbide source is at least approximately 10% of the total weight, heating the carbide source and the biocompatible material to a predetermined temperature to melt the biocompatible material and allow the carbide source to go into solution to form a molten homogeneous solution, and impinging the molten homogeneous solution with a high pressure fluid to form spray atomized powder having carbide particles. The size of a particle of carbide in the atomized powder may be approximately 900 nanometers or less. The biocompatible material may be cobalt chrome, the carbide source may be graphite, and the fluid may be a gas or a liquid.

Abstract: The present invention is steel for surface hardening for machine structural use which contains, by mass %, C: 0.3 to 0.6%, Si: 0.02 to 2.0%, Mn: 0.35 to less than 1.5%, and Al: 0.01 to 0.5%, is restricted to B: less than 0.0003%, S: 0.0001 to 0.021%, N: 0.003 to 0.0055%, P: 0.0001 to 0.03%, and O: 0.0001 to 0.0050%, has a ratio Mn/S of Mn and S satisfying 70 to 30,000, has a balance of Fe and unavoidable impurities, and, when nitrided, then induction hardened, has a surface hardenability of a Vicker's hardness when tempered at 300° C. of 650 or more.

Abstract: A separator includes a gas flow path forming body, which includes a substrate made of stainless steel, a resin layer arranged on the substrate, and a conductive layer arranged on the surface of the resin layer. The resin layer contains a filler, which has conductivity and greater hardness than an oxide film of the substrate. The conductive layer contains graphite. The filler extends through the oxide film of the substrate and contacts the base material.

Abstract: This invention relates to powder metallurgy, more specifically, to methods of fabricating hard alloy items. The invention can be used as an iron, cobalt or nickel base binder for the fabrication of diamond cutting tools for the construction industry and stone cutting, including segmented cutting discs of different designs and wires for reinforced concrete and asphalt cutting used in the renovation of highway pavements, runways in airports, upgrading of metallurgical plants, nuclear power plants, bridges and other structures, monolithic reinforced concrete cutting drills, as well as discs and wires for the quarry production of natural stone and large scale manufacturing of facing construction materials. This invention achieves the objective of providing binders for the fabrication of diamond tools having higher wear resistance without a significant increase in the sintering temperature, as well as higher hardness, strength and impact toughness.

Abstract: A method for stopping a fuel cell system includes supplying a fuel gas containing a fuel to an anode of a fuel cell which is to generate electric power. An oxidant gas containing an oxidant is supplied to a cathode of the fuel cell. A concentration of the oxidant gas in the cathode is reduced. An output voltage of the fuel cell is lowered while a slope of a change in the output voltage with respect to elapsed time is controlled such that an output current of the fuel cell has a predetermined relationship with a predetermined current reference value.

Abstract: According to one embodiment, a nonwoven fiber mat includes between 10% and 50% by weight of a plurality of first glass fibers having an average diameter of less than 5 ?m and between 50% and 90% by weight of a plurality of second glass fibers having an average diameter of greater than 6 ?m. The nonwoven fiber mat also includes an acid resistant binder that binds the first and second glass fibers together. The nonwoven fiber mat has an average pore size of between 1 and 100 ?m and exhibits an air permeability of below 100 cubic feet per minute per square foot (cfm/ft2) as measured by the Frazier test at 125 Pa according to ASTM Standard Method D737.

Abstract: The present invention relates to a method for producing lithium aluminum titanium phosphates of the general formula Li1+xTi2?xAlx(PO4)3, wherein x is ?0.4, a method for their production as well as their use as solid-state electrolytes in lithium ion accumulators.

Abstract: Stable solutions comprising high concentrations of charged coordination complexes, including iron hexacyanides are described, as are methods of preparing and using same in chemical energy storage systems, including flow battery systems. The use of these compositions allows energy storage densities at levels unavailable by other iron hexacyanide systems.

Abstract: Steel for machine structure use excellent in tool lifetime in a broad range of cutting speeds regardless of continuous machining, intermittent machining, or other systems and further in various machining environments such as use of a cutting fluid or a dry, semidry, and oxygen enriched environment, having a chemical composition containing, by mass %, C: 0.01 to 1.2%, Si: 0.005 to 3.0%, Mn: 0.05 to 3.0%, P: 0.0001 to 0.2%, S: 0.0001 to 0.35%, N: 0.0005 to 0.035%, and Al: 0.05 to 1.0%, satisfying [Al %]?(27/14)×[N %]?0.05%, and having a balance of Fe and unavoidable impurities and forming an Al2O3 coating on the surface of a cutting tool by machining using a cutting tool coated on the surface contacting the machined material by metal oxides with a value of a standard free energy of formation at 1300° C. of that value of Al2O3 or more, and a machining method of the same.

Abstract: A Si-killed steel wire rod for obtaining a spring excellent in fatigue properties and a spring excellent in fatigue properties obtained from such steel wire rod are provided. In the Si-killed steel wire rod of the present invention, oxide-based inclusions present in the wire rod contain SiO2: 30-90%, Al2O3: 2-35%, MgO: 35% or below (not inclusive of 0%), CaO: 50% or below (not inclusive of 0%), MnO: 20% or below (not inclusive of 0%) and BaO: 0.2-20% respectively, and total content of (CaO+MgO) is 3% or above.

Abstract: A tantalum or tantalum alloy which contains pure or substantially pure tantalum and at least one metal element selected from the group consisting of Ru, Rh, Pd, Os, Jr, Pt, Mo, W and Re to form a tantalum alloy that is resistant to aqueous corrosion. The invention also relates to the process of preparing the tantalum alloy.

Abstract: An aluminum alloy fin material for a heat exchanger having suitable strength before brazing enabling easy fin formation, having high strength after brazing, having a high thermal conductivity (electrical conductivity) after brazing, and having superior sag resistance, erosion resistance, self corrosion prevention, and sacrificial anode effect, a method of production of the same, and a method of production of a heat exchanger using the fin material are provided, that is, an aluminum alloy fin material having a chemical composition of Si: 0.7 to 1.4 wt %, Fe: 0.5 to 1.4 wt %, Mn: 0.7 to 1.4 wt %, and Zn: 0.5 to 2.5 wt %, Mg as an impurity limited to 0.

Abstract: An operating method is provided for a fuel cell system with a radiator structure which is flowed through by ambient air and a fuel cell stack, at least part of the outgoing air flow of the fuel cell stack can be guided onto the radiator structure such that, at the radiator structure, the guided outgoing air flow causes an increase in mass flow of the ambient air through the radiator structure according to the jet pump principle. At least part of the outgoing air flow of the fuel cell stack can be guided through a gas expansion machine. The division of energy which is contained in the outgoing air flow and can be recovered in the gas expansion machine and/or at the radiator structure according to the jet pump principle is changed by an electronic control unit in a manner which is adapted to boundary conditions.

Abstract: A method for producing a battery module having a plurality of individual electrochemical cells, includes the following steps: —arranging cell cans; —embedding the cell cans in a metal foam; and —inserting cell coils into the cell cans. The metal foam is used hereby as common negative pole or positive pole of the single cells.

Abstract: This electrode for fuel cell comprises: carbon nanotubes; a catalyst for fuel cell supported on the carbon nanotubes; and an ionomer provided to coat the carbon nanotubes and the catalyst for fuel cell, wherein when a length of the carbon nanotubes is represented by La [?m] and an inter-core pitch of the carbon nanotubes is represented by Pa [nm], the length La and the inter-core pitch Pa satisfy two expressions given below: 30?La?240; and 0.351×La+75?Pa?250.

Abstract: A fuel cell system according to the present invention comprises a fuel gas supply system that supplies a fuel gas from a fuel supply source to a fuel cell that includes a stack including a plurality of cells, and a fuel off-gas circulation system that resupplies fuel off-gas to the stack. The fuel off-gas circulation system includes: a mixed fuel gas flow path formed such that a mixed fuel gas containing the fuel off-gas and the fuel gas flows in a direction along an inner surface of a manifold installed in the stack; and a point of merger where the fuel off-gas and the fuel gas merge with each other to produce the mixed fuel gas, the point of merger being arranged on one surface side of the manifold. With such configuration, the heat exchange efficiency of the fuel off-gas and the fuel gas can be increased, and ice resulting from water in the fuel off-gas can be prevented from flowing into the fuel cell stack.

Abstract: Binder for an electrode of an electrochemical system having a non-aqueous electrolyte, said binder comprising a first polymer which has functional groups capable of reacting with a crosslinking agent and is crosslinked with said crosslinking agent, the crosslinked first polymer forming a three-dimensional network in which a second polymer chosen from fluoropolymers is imprisoned.