Abstract: Disclosed are electrochemical devices, such as lithium ion battery electrodes, lithium ion conducting solid-state electrolytes, and solid-state lithium ion batteries including these electrodes and solid-state electrolytes. Also disclosed are methods for making such electrochemical devices.

Abstract: The positive electrode active material layer includes a plurality of particles of a positive electrode active material and a reaction mixture where reduced graphene oxide is bonded to a polymer having a functional group as a side chain. The reduced graphene oxide has a sheet-like shape and high conductivity and thus functions as a conductive additive by being in contact with the plurality of particles of the positive electrode active material. The reaction mixture serves as an excellent binder since the reduced graphene oxide is bonded to the polymer. Therefore, even a small amount of the reaction mixture where the reduced graphene oxide is covalently bonded to the polymer excellently serves as a conductive additive and a binder.

Abstract: An assembly for an electrochemical system, comprising a separator plate with at least one layer and a membrane electrode assembly, MEA, the MEA having: an electrochemically active region, a frame-like reinforcing layer surrounding the electrochemically active region, and at least one tab for positioning the MEA relative to the separator plate and/or for fastening the MEA to the separator plate, wherein the layer has a first flat side and a second flat side opposite the first flat side, wherein the tab is connected at one side to the frame-like reinforcing layer and its free end is arranged on the side of the second flat side of the layer, wherein the frame-like reinforcing layer is arranged on the first flat side of the layer.

Abstract: Core-shell particles, composite anode material, anodes made therefrom, lithium ion cells and methods are provided, which enable production of fast charging lithium ion batteries. The composite anode material has core-shell particles which are configured to receive and release lithium ions at their cores and to have shells that are configured to allow for core expansion upon lithiation. The cores of the core-shell particles are connected to the respective shells by conductive material such as carbon fibers, which may form a network throughout the anode material and possibly interconnect cores of many core-shell particles to enhance the electrical conductivity of the anode. Ionic conductive material and possibly mechanical elements may be incorporated in the core-shell particles to enhance ionic conductivity and mechanical robustness toward expansion and contraction of the cores during lithiation and de-lithiation.

Abstract: A lithium-polymer based battery pack for power a hand held power tool or a garden tool, the battery pack has a plurality of battery cells located within housing that is selectively connectable to and supportable by a hand held power tool or a garden tool. The battery cells have a lithium-polymer based chemistry and a nominal charged internal impedance of less than or equal to approximately 5 milliohms. In one embodiment the cells are think cells are stacked within the housing such that each sell is layered over or under an adjacent cell and a resiliently deformable substrate located between adjacent battery cells. In another embodiment the cells may be interconnected to have a combined output voltage of at least 9 volts and to produce a combined average discharge current of greater than 20 amps. A lithium-polymer tool battery and a battery powered tool are also part of the invention.

Abstract: To provide an air-cooled fuel cell system configured to efficiently warm up a fuel cell. An air-cooled fuel cell system, wherein the air-cooled fuel cell system comprises: a fuel cell, a reaction air supplier configured to supply reaction air to a reaction air inlet of the fuel cell, a reaction air supply flow path configured to connect the reaction air supplier and the reaction air inlet of the fuel cell, a reaction air discharge flow path configured to connect a reaction air outlet of the fuel cell and the outside of the air-cooled fuel cell system, a housing, a temperature acquirer configured to acquire a temperature of inside air discharged from a cooling air outlet, and a controller; and wherein, based on the temperature measured by the temperature acquirer, the controller controls opening and closing of the opening and closing unit and an opening degree thereof.

Abstract: In a redox flow battery (RFB), the base solvent of the electrolytes tends to migrate across the barrier layer from one electrode toward the other. This can result in a volume and concentration imbalance between the electrolytes that is detrimental to battery efficiency and capacity. Compatible electrolytes can be mixed to rebalance the system, but for incompatible electrolytes mixing is not a viable option. To this end, the RFB herein includes a separator that recovers base solvent from the vapor phase of one of the electrolytes and returns the recovered base solvent to the other electrolyte to thereby reverse the imbalance.

Abstract: An embodiment apparatus for fabricating a membrane-electrode-subgasket assembly includes a feeding unit including a sheet feeding roller configured to feed a membrane-electrode assembly sheet having catalyst layers provided on both surfaces thereof, a cutting unit including a cutting roller and a support roller configured to rotate in engagement with the cutting roller, wherein the cutting roller is configured to punch portions outside each of the catalyst layers, a first pressing unit including a suction roller and a first hot roller, and a second pressing unit including second hot rollers.

Abstract: The present disclosure provides a button-type lithium ion battery with a metal housing, including: a metal housing; a cell, received in the metal housing; a terminal, disposed on an outside of the metal housing; at least one first electrode tab, arranged on the cell and electrically connected to the metal housing; at least one second electrode tab, arranged on the cell and electrically connected to the terminal; and an insulating member disposed between the metal housing and the terminal; wherein the insulating member is insulating and sealing the metal housing and the terminal; a polarity of the at least one first electrode tab is opposite to that of the at least one second electrode tab; a polarity of the metal housing is opposite to that of the terminal; the metal housing and the terminal are sealed to the insulating member by means of heat or adhesion.

Abstract: Systems and methods for one or more bipolar plate and a stack for an electrochemical system. The bipolar plate comprising a first individual plate and a second individual plate. The first individual plate has at least one first positioning opening with a first crimping. The second individual plate has at least one second positioning opening with a second crimping. The first positioning opening and the second positioning opening of the individual plates arranged in alignment with each other. The first crimping forms at least one first contact area for a first positioning pin and the second crimping forms at least one second contact area for the first positioning pin.

Abstract: Provided is a terminal assembly for an electrochemical battery comprising a terminal connector; a conductive flat-plate with an electrically conducting perimeter; an electrically insulating tape member; and a terminal bipolar electrode plate. The electrically insulating tape member is in between the conductive flat-plate and the terminal bipolar electrode plate such that the electrically insulating tape member does not cover the entire surface area of the conductive flat-plate. The electrically conducting perimeter enables bi-directional uniform current flow through the conductive flat-plate between the terminal connector and the terminal bipolar electrode plate. Also provided is a battery frame member for a static rechargeable battery comprising a liquid diversion system; a gutter; a sealing member; a gas channel; and a ventilation hole.

Abstract: Devices and methods for generating electricity in a direct carbon fuel cell are provided herein. The method includes heating and melting an alloy to obtain a liquid alloy anode; circulating the liquid alloy anode through a porous ceramic cathode, the cathode being a tubular structure and in communication with oxygen; reducing the oxygen at the porous cathode to obtain oxygen ions for diffusing through an electrolyte to the liquid alloy anode; and oxidizing the oxygen ions at the liquid alloy anode thereby generating electricity. The direct carbon fuel cells have high electronic conductivity, high carbon solubility with fast carbon diffusion, lower viscosity and eutectic temperatures, and rapid fuel dissolution kinetics.

Abstract: Proposed are a fuel cell system and a method of controlling the fuel cell system. The fuel cell system includes: a hydrogen supply unit connected to a hydrogen inlet side of a fuel cell stack, with a supply valve and a sensor being provided in the hydrogen supply unit; a hydrogen discharge unit connected to a hydrogen outlet side of the fuel cell stack, with a water trap and a purge valve being provided in the hydrogen discharge unit; and a controller configured to calculate an amount of hydrogen discharged through the purge valve from an amount of hydrogen supplied to the fuel cell stack and an amount of hydrogen consumed therein, and to perform compensation control of the supply valve when the amount of the discharged hydrogen is at or above a reference value.

Abstract: A fuel cell stack includes a plurality of fuel cells received between two end plates, at least one end plate of which has flow channels formed therein with ports for the anode fresh gas and the anode exhaust gas as well as ports for the cathode fresh gas and the cathode exhaust gas, wherein a hygroscopic material forms the wall between the ports for the anode exhaust gas and the cathode fresh gas.

Abstract: The present disclosure provides a button-type lithium ion battery with a metal housing, including: a metal housing; a cell, received in the metal housing; a terminal, disposed on an outside of the metal housing; at least one first electrode tab, arranged on the cell and electrically connected to the metal housing; at least one second electrode tab, arranged on the cell and electrically connected to the terminal; and an insulating member disposed between the metal housing and the terminal; wherein the insulating member is insulating and sealing the metal housing and the terminal; a polarity of the at least one first electrode tab is opposite to that of the at least one second electrode tab; a polarity of the metal housing is opposite to that of the terminal; the metal housing and the terminal are sealed to the insulating member by means of heat or adhesion.

Abstract: The present disclosure relates to a method for preparing a fuel cell catalyst electrode, the fuel cell catalyst electrode prepared therefrom, a membrane electrode assembly including the fuel cell catalyst electrode, and a fuel cell including the membrane electrode assembly.

Abstract: The present disclosure provides a fuel cell electrical power system, a first fuel cell module, a second fuel cell module, a heat exchanger, a common coolant, a first coolant piping branch, and a second coolant piping branch. A first pump and a first valve are disposed on the first coolant branch, and a second pump and a second valve are disposed on the second coolant branch. The fuel cell electrical power system is capable of functioning in a condition in which the second fuel cell module and the second pump are not operating to cause substantially all of the flow rate of coolant fluid produced by the first pump to circulate through the common coolant piping and to circulate substantially none of the flow rate of the coolant fluid produced by the first pump through the second fuel cell module.

Abstract: Systems and methods are provided for assembling and operating an electrode assembly for a redox flow battery system. In one example, the electrode assembly may include an inflatable housing in which a negative electrode spacer and a positive electrode may be positioned, wherein the inflatable housing may inflate responsive to applied internal pressure during operation of the redox flow battery system. In some examples, the electrode assembly may be assembled via roll-to-roll processing and may be mechanically and fluidically coupled to electrode assemblies of like configuration. In this way, tolerance stacking may be decreased, processing may be simplified, and costs may be reduced relative to molding-based processes for electrode assembly manufacturing.

Abstract: The present disclosure provides a gas diffusion layer for a proton exchange membrane fuel cell. The gas diffusion layer is a graphene membrane, and graphene lamellae in the graphene membrane are arranged irregularly. The present disclosure further provides a preparation method for the gas diffusion layer, and the proton exchange membrane fuel cell including the gas diffusion layer.

Abstract: The present disclosure relates generally to a carbon-neutral process for the generation of carbon-neutral hydrogen and carbon-neutral electricity. More specifically, the present disclosure relates to compositions, methods and apparatus employing a carbon-neutral process for generating electricity employing a liquid organic hydrogen carrier (LOHC) for supplying hydrogen for generating the carbon neutral electricity. The present disclosure also relates more specifically to carbon-neutral compositions consisting of liquid organic hydrogen carriers used for supplying hydrogen to generate electricity that may be regenerated in a carbon-neutral process using an apparatus with a net zero atmospheric emission of carbon oxides.