摘要:
[Abstract] To provide a means for more effectively suppressing a short circuits in a secondary battery. A method for charging a secondary battery including a positive electrode current collector, a positive electrode active material layer, a solid electrolyte layer, and a negative electrode current collector in this order and utilizing a deposition-dissolution reaction of metallic lithium as a reaction of a negative electrode, the method having a multi-stage charging step, and comprising at least: a first charging step in which the secondary battery is charged at a first current density I1 to deposit metallic lithium on a surface on the solid electrolyte layer side of the negative electrode current collector to form a deposited Li layer that is a part of a negative electrode active material layer and that comprises the metallic lithium; and a second charging step in which the secondary battery is charged at a second current density I2 greater than the first current density I1 after the first charging step to increase a thickness of the deposited Li layer, wherein the first charging step includes performing pausing at least once or discharging at least once, in which the secondary battery is charged at the first current density I1 so that an SOC does not exceed 4.5%.
摘要:
It is an object of the present invention to provide an all solid-state battery and a method for manufacturing all solid-state battery capable of reducing damage during the manufacturing process. An all solid-state battery comprising: a positive electrode current collector; a positive electrode active material layer provided on a surface of the positive electrode current collector; a first elastic member covering a periphery of the positive electrode active material layer and having an elastic modulus less than or equal to an elastic modulus of the positive electrode active material layer; a solid electrolyte layer facing the positive electrode current collector with the first elastic member and the positive electrode active material layer in between; a negative electrode current collector facing the positive electrode current collector with the solid electrolyte layer in between; and a negative electrode active material layer provided between the negative electrode current collector and the solid electrolyte layer and disposed inside a periphery of the solid electrolyte layer, is provided.
摘要:
A fuel cell system that includes a fuel cell body that is formed by a membrane electrode assembly including an anode catalyst and a cathode catalyst between which an electrolyte membrane is sandwiched and a pair of separators forming an anode-catalyst-side flow channel and a cathode-catalyst-side flow channel, a fuel supply system configured to supply fuel gas to the fuel cell body, an oxidant supply system configured to supply oxidant gas to the fuel cell body, a control device that controls these supply systems in accordance with an operating state of the fuel cell system and a catalyst deterioration recovery device that recovers deterioration of the anode catalyst. The catalyst deterioration recovery device includes a plurality of catalyst deterioration recovery means, a specific operating state detecting means configured to detect a specific operating state of the fuel cell system and a selecting means configured to selectively activate the plurality of catalyst deterioration recovery means in accordance with the specific operating state.
摘要:
A catalyst deterioration recovery device in a fuel cell system that includes a fuel cell including a membrane electrode assembly configured to include an electrolyte membrane and anode and cathode catalysts between which the electrolyte membrane is sandwiched from both sides and anode and cathode separators respectively including an anode gas flow channel and a cathode gas flow channel, the membrane electrode assembly being sandwiched between the anode and cathode separators. The catalyst deterioration recovery device recovers performance decreased by adsorption of carbon monoxide to the anode catalyst. The catalyst deterioration recovery device includes a recovery control unit configured to supply at least a part of oxygen to be supplied to the cathode gas flow channel to the anode catalyst via the electrolyte membrane.
摘要:
The present invention has an obj ect to provide a catalyst having excellent oxygen reduction reaction activity. The present invention relates to a catalyst comprising a catalyst support and a catalyst metal supported on the catalyst support, wherein a specific surface area of the catalyst per support weight is 715 m 2 /g support or more or a covering ratio of the catalyst metal with an electrolyte is less than 0.5, and an amount of an acidic group of the catalyst per support weight is 0.75 mmol/g support or less.
摘要:
A fuel cell system which prevents the deterioration of the fuel cell stack when feeding of the oxidant gas is paused under a load to perform a fuel conservation operation. Controller shuts down oxidant gas compressor and cooling water circulating pump to execute fuel conservation operation at a low fuel cell system load. The controller gives a current draw instruction to electric power controller. In the fuel conservation operation, electric power controller draws a current larger than zero from fuel cell stack, and keeps the total charge drawn per unit time constant or substantially constant.
摘要:
An all-solid-state battery including, a negative electrode current collector foil, a solid electrolyte layer, and a positive electrode layer, wherein the negative electrode current collector foil is connected to an insulating first elastic body having a frame shape that follows and surrounds a shape of a peripheral edge of the solid electrolyte layer, the first elastic body is connected to a main surface of the solid electrolyte layer or a side surface of the solid electrolyte layer to form an internal space surrounded by the solid electrolyte layer, the negative electrode current collector foil, and the first elastic body, the solid electrolyte layer is disposed such that an outer shape thereof includes an outer shape of the positive electrode layer inside in plan view, and when the all-solid-state battery is in a fully discharged state, the internal space is filled with a negative electrode layer having electrical conductivity and/or lithium ion conductivity.
摘要:
Provided is an electrocatalyst for solid polymer fuel cells capable of increasing the active surface area for reactions in a catalyst component, increasing the utilization efficiency of the catalyst, and reducing the amount of expensive precious metal catalyst used. Also provided are a membrane electrode assembly that uses this electrocatalyst and a solid polymer fuel cell. An electrocatalyst (1) for a solid polymer fuel cell is provided with a catalyst (2) and solid proton conducting material (3). A liquid conductive material retention part (4a) that retains a liquid proton conducting material that connects the catalyst (2) and solid proton conducting material (3) is provided between the same. The surface area of the catalyst (2) exposed within the liquid conductive material retention part (4a) is larger than the surface area of the catalyst (2) in contact with the solid proton conducting material (3).
摘要:
[Object] To provide a gas diffusion electrode capable of a high current density operation of a fuel cell. [Solving means] A gas diffusion electrode including a hydrophilic porous layer having an electrically conductive material and an ion conductive material; and a catalyst layer adjacent to the hydrophilic porous layer, wherein a water transport resistance of the hydrophilic porous layer is smaller than a water transport resistance of the catalyst layer.