Abstract: Separators, materials, and processes for producing electrochemical cells, for example, lithium (Li) metal batteries, and electrochemical cells produced therefrom. Such a separator includes a permeable membrane formed of a first polymer that is hydrophobic and has oppositely-disposed first and second surfaces, a second polymer that is hydrophilic and is incorporated into the first surface of the first polymer so that the first surface of the first polymer is a hydrophilic surface, and a conductive composite layer on the hydrophilic surface. The composite layer contains at least one layer of a carbonaceous material and an aqueous binder that binds the carbonaceous material together and to the hydrophilic.

Abstract: An electrolyte for a lithium secondary battery and a lithium secondary battery including the same, and more specifically, an electrolyte for a lithium secondary battery that can uniformly maintain a lithium ion concentration on the surface of a lithium metal negative electrode to inhibit the growth of lithium dendrites, even if a small amount of an additive comprising a functional group forming a bond with lithium metal and a polyethylene oxide chain interacting with lithium ion is contained.

Abstract: A secondary battery production method is provided, with which deformation of a current collector is reduced. The method produces a secondary battery including: an electrode assembly having positive and negative electrode plates; and a positive electrode current collector. The positive electrode plate includes a positive electrode core and a positive electrode active material layer, and the electrode assembly includes a positive electrode core-stacked portion. The method includes: an electrode assembly production step of producing the electrode assembly; and an ultrasonic bonding step of ultrasonically bonding the positive electrode current collector to the positive electrode core-stacked portion. The positive electrode current collector has a thin-walled portion.

Abstract: An energy storage device can include a first electrode, a second electrode and a separator between the first electrode and the second electrode wherein the first electrode or the second electrode includes elemental lithium metal and carbon particles. A method for fabricating an energy storage device can include forming a first electrode and a second electrode, and inserting a separator between the first electrode and the second electrode, where forming the first electrode or the second electrode can include combining elemental lithium metal and a plurality of carbon particles.

Abstract: Silicon materials suitable for use as an anode material and associated method of production are disclosed herein. In one embodiment, a silicon material includes crystalline silicon in a matrix and macro-scale pores distributed in the matrix of the crystalline silicon. The macro-scale pores can have a size greater than 100 nanometers, and surfaces of crystalline silicon in the macro-scale pores are coated with carbon.

Abstract: Battery systems and methods for accelerating ion diffusion in polymer electrolyte materials. The application of oscillating electric fields is used to improve the ionic transport properties of polymer electrolytes by reducing the apparent hopping barrier of the lithium ions within the electrolyte material. Polymer-electrolyte-based battery cells exhibiting enhanced ion mobility due to the application of such oscillating electric fields.

Abstract: A resin frame member is produced by using a method of producing a resin frame member for a fuel cell. An inner peripheral end of the resin frame member includes an inclined surface formed over the entire periphery thereof. The inclined surface is inclined inward from one surface of the resin frame member toward the other surface of the resin frame member. The width of the inclined surface is gradually reduced from the center toward both ends of each side part of the inner peripheral end in a direction in which the side part of the inner peripheral end extends.

Abstract: Disclosed is a negative electrode for a lithium secondary battery which includes: a negative electrode current collector; a first negative electrode mixture layer positioned on at least one surface of the negative electrode current collector and including a first negative electrode active material, a polymer binder and a conductive material; and a second negative electrode mixture layer positioned on the top surface of the first negative electrode mixture layer and including a second negative electrode active material, a polymer binder and a conductive material, wherein the second negative electrode active material has a smaller water contact angle as compared to the first negative electrode active material, and at least one of the first negative electrode active material and the second negative electrode active material is surface-modified.

Abstract: A fuel cell capable of reducing the stress exerted upon an electrolyte membrane resulting from the swelling and contraction of the electrolyte membrane. The fuel cell includes at least an MEGA with catalyst layers joined to the opposite sides of the electrolyte membrane, and a pair of separators disposed so as to sandwich the MEGA. The MEGA generates power with a hydrogen gas fed to one side of the MEGA and with an oxidant gas fed to the other side. Separators each have a plurality of projections formed on the side of the MEGA so as to form a gas channel through which the hydrogen gas or oxidant gas flows between the projections. The electrolyte membrane has a plurality of through-holes formed at positions facing the projections along the direction in which the projections extend.

Abstract: A solid electrolyte composition containing an inorganic solid electrolyte having conductivity of an ion of a metal belonging to Group I or II of the periodic table and an acid-modified cellulose nanofiber, a solid electrolyte-containing sheet and a manufacturing method therefor, and an all-solid state secondary battery having an inorganic solid electrolyte layer containing the inorganic solid electrolyte having conductivity of an ion of a metal belonging to Group I or II of the periodic table and an acid-modified cellulose nanofiber and a manufacturing method therefor.

Abstract: Each of separator members of a fuel cell stack includes a cell voltage terminal protruding outward from an outer peripheral portion of a separator body. Each of the cell voltage terminals includes a plate shaped terminal, first protrusions, and second protrusions. At least some of the cell voltage terminals are arranged in a line in a stacking direction. In the cell voltage terminals facing each other in the stacking direction, the first protrusion of one of the cell voltage terminals and the second protrusion of the other of the cell voltage terminals face each other, and contact each other through an electrically insulating member.

Abstract: Provided is a manufacturing method of a fuel-cell single cell including a membrane-electrode assembly, an anode gas diffusion layer, a cathode gas diffusion layer, and a frame-shaped resin frame to which a peripheral edge portion of the membrane-electrode assembly is fixed. The method includes an adhesive application step of applying an adhesive by screen printing to a predetermined area of the resin frame while fixing the resin frame by suction, and a stacking step and a UV irradiation step of bonding together the resin frame to which the adhesive has been applied and the membrane-electrode assembly by the adhesive.

Abstract: A reformer and an evaporator of a fuel cell module are provided adjacent to each other. An exhaust gas combustion chamber which combusts a fuel exhaust gas and an oxygen-containing exhaust gas discharged from a fuel cell to produce a combustion exhaust gas includes a first chamber and a second chamber connected to each other, and a combustion chamber outlet for discharging the combustion exhaust gas in the exhaust gas combustion chamber. At least part of an outer wall surface of the first chamber faces the evaporator with clearance. At least part of a wall forming the second chamber is a common wall shared with the reformer.

Abstract: A unit cell for a fuel cell stack including an anode catalyst layer separated by a polymer electrolyte membrane from a cathode catalyst layer, a first cell end plate separated by a first gas diffusion layer from the anode catalyst layer, and a second cell end plate separated by a second gas diffusion layer from the cathode catalyst layer, wherein the first cell end plate, the second cell end plate, or both include a matrix of electrically-conducting protrusions thereof.

Abstract: A fuel cell stack including: a metal-supported cell including a power generation cell formed of paired electrodes and an electrolyte sandwiched from both sides between the paired electrodes, and a metal supporting portion which is made of metal and which supports the power generation cell; a separator defining and forming a flow passage portion for gas flow between the separator and the power generation cell; a welded portion in which the metal-supported cell and the separator are welded to each other; a spring portion configured to apply absorption reaction force for absorbing displacement in a stacking direction in the welded portion to the metal-supported cell; and a stopper portion configured to restrict a displacement amount of the spring portion.

Abstract: In a manufacturing method for a gas diffusion sheet, when a first film is joined to a front end portion of a base material in a conveyance direction, a first joining material is made to penetrate a first overlapping portion where the first film and the base material are superimposed on each other, and the first film and the base material are thus joined to each other physically through the first joining material. When a second film is joined to a rear end portion of the base material in the conveyance direction, a second joining material is made to penetrate a second overlapping portion where the base material and the second film are superimposed on each other, and the base material and the second film are thus physically joined to each other through the second joining material.

Abstract: A non-aqueous electrolyte for secondary battery, secondary battery having the same and a method of manufacturing the same are provided. The non-aqueous electrolyte includes an electrolytic salt having an electrolytic salt concentration of about 0.5 M (mol/L) to about 3.8 M (mol/L) in the non-aqueous electrolyte, a first solvent having a solubility of the electrolytic salt in a range from about 100 g to about 400 g, and a second solvent having a solubility of the electrolytic salt of less than or equal to about 1 g. The first solvent includes a coordination solvent coordinated with an ionized ion from the electrolytic salt and a free solvent that is not coordinated with an ionized ion from the electrolytic salt, and a peak area ratio of the free solvent determined by a Raman spectrum is less than about 20%.

Abstract: The present invention provides a lithium secondary battery comprising a non-aqueous liquid electrolyte comprising lithium bis(fluorosulfonyl)imide (LiFSI) and a fluorinated benzene-based compound as additives, a positive electrode comprising a lithium-nickel-manganese-cobalt-based oxide as a positive electrode active material, a negative electrode, and a separator. With the non-aqueous liquid electrolyte for a lithium secondary battery of the present invention, a solid SEI film is formed on a negative electrode when initially charging a lithium secondary battery comprising the non-aqueous liquid electrolyte, and an output property of the lithium secondary battery is improved, and an output property and stability after high temperature storage are capable of being enhanced as well.

Abstract: A fuel cell stack is described. The fuel cell stack comprises an interconnect assembly comprising a cathode-side interface coupled to an interconnect via a first joint, and an anode-side interface coupled to the interconnect via a second joint, the interconnect assembly having a first coefficient of thermal expansion (CTE) at an interface side of the interconnect assembly. The fuel cell stack further comprises a fuel cell element coupled to the interconnect assembly at the interface side via a hermetic seal, the fuel cell element having a second CTE at the interface side, the first CTE and the second CTE satisfying a predetermined CTE matching condition.

Abstract: A battery module having a plurality of stacked battery module units is provided. The battery module unit includes a cooling fin in which an interval between two cooling plates facing each other is expandable and contractible. A battery cell is in contact with each of the two cooling plates and having lead tabs at each end. Protruding steps extend from both ends of the cooling plates to maximize a contact area with the lead tabs of the battery cell. Lead tab fasteners are coupled to the protruding steps to fix the lead tabs of the battery cell to the protruding steps. The lead tap fasteners include connecting grooves and connecting protrusions relative to each other to be coupled by a linear relative movement with lead tap fasteners of an adjacent battery module unit.