摘要:
A fuel cell including a plurality of tubular unit cells each including: a first electrode layer, an electrolyte layer, and a second electrode layer, stacked radially in a direction from a center axis to an outer region thereof; an internal current collector in an interior of the unit cell; and an external current collector arranged at an outer circumferential surface of the unit cell, the external current collector including a plurality of connecting portions configured to electrically connect between the unit cell and at least one another unit cell of the plurality of unit cells, and the connecting portions form two or more electrical paths between a unit cell of the plurality of unit cells and another unit cell of the plurality of unit cells.
摘要:
The present invention relates to a positive active material for a rechargeable lithium battery, a method of preparing the same, and a rechargeable lithium battery comprising the same. The positive active material includes a lithium/nickel-based compound wherein primary particles having an average particle diameter ranging from 1 μm to 4 μm are agglomerated to form secondary particles. The positive active material of the present invention has excellent electrochemical performance and outstanding inhibition to swelling at high temperatures.
摘要:
A fuel cell stack includes a plurality of unit cells, bypass resistors, and connective resistors. The unit cells are connected in series and/or in parallel. The connected resistors are disposed between the unit cells connected in series and disconnected by heat due to resistance at a small current value in comparison to an current collector. The bypass resistors are connected in parallel to the unit cells or the unit cells connected in parallel.
摘要:
A method of driving a fuel cell system according to embodiments of the present invention includes supplying a first amount of oxidizer (which is less than a normal amount of oxidizer) to a fuel cell stack while continuously supplying fuel to the fuel cell stack, supplying a second amount of oxidizer (which is more than the normal amount) to the fuel cell stack, and supplying a third amount of oxidizer (which is the normal amount of oxidizer supplied in a normal driving state) to the fuel cell stack.
摘要:
A fuel cell system and a control method thereof are capable of preventing anode flooding due to a temperature difference between a stack and reformate upon starting a fuel cell system. The method of controlling a fuel cell system including steps of detecting a temperature of a fuel cell stack, detecting a temperature of reformate that is generated in a fuel reformer and then is supplied to the fuel cell stack through a heat exchanger, and setting the temperature of the reformate to be lower than the temperature of the fuel cell stack during a starting time of the fuel cell system.
摘要:
A fuel cell stack for generating electrical energy by an electrochemical reaction of a fuel and an oxidizing gas including a plurality of electricity generating units and a fastening member is disclosed. The plurality of electricity generating units are configured for an electrochemical reaction between the fuel and the oxidizing gas to generate electrical energy, and the fastening member combines the plurality of electricity generating units into a stack. Each electricity-generating unit includes a membrane electrode assembly (MEA) and separators that are provided on each side of the MEA. Each separator comprises a channel on a surface facing the MEA. The channel is divided into a multiple of 2 sub-channels that is greater than 2 on a surface of the separator, and the sub-channels have substantially the same fluid passage length.
摘要:
A fuel cell stack and a manufacturing method thereof are disclosed. The fuel cell stack has at least one unit cell. The unit cell includes a first electrode collector, a first electrode layer formed on the first electrode collector, an electrolyte layer formed on the first electrode layer, a second electrode layer formed on the electrolyte layer, and a second electrode collector formed on the second electrode layer. At least one of the first and second electrode collectors may include a porous metal substrate having a density in a range from about 800 kg/m3 to about 1600 kg/m3 and a plurality of metal wires electrically connected to the porous metal substrate. The density of an electrode collector may be optimized to have an improved contact state between an electrode and the electrode collector. During operation, the fuel cell stack may thus have enhanced performance characteristics.
摘要翻译:公开了一种燃料电池堆及其制造方法。 燃料电池堆具有至少一个单电池。 单元电池包括第一电极集电体,形成在第一电极集电体上的第一电极层,形成在第一电极层上的电解质层,形成在电解质层上的第二电极层和形成在第二电极上的第二电极集电体 层。 第一和第二电极收集器中的至少一个可以包括密度在约800kg / m 3至约1600kg / m 3范围内的多孔金属基底和与多孔金属基底电连接的多个金属线。 可以优化电极集电器的密度以使电极和电极收集器之间具有改善的接触状态。 在操作期间,燃料电池堆可因此具有增强的性能特征。
摘要:
The present invention relates to a method of preparing a positive active material for a rechargeable lithium battery. The positive active material includes a lithium/nickel-based compound wherein primary particles having an average particle diameter ranging from 1 μm to 4 μm are agglomerated to form secondary particles. The positive active material of the present invention has excellent electrochemical performance and outstanding inhibition to swelling at high temperatures.
摘要:
A fuel cell stack including an electricity generating unit for generating electrical energy by electrochemically reacting a fuel and an oxidizing agent, the electricity generating unit including: a first separator; a second separator; a membrane electrode assembly (MEA) between the first separator and the second separator, each of the first and second separators including a channel on a surface facing the MEA and a manifold in the surface facing the MEA, the manifold communicating with the channel; and a gasket, positioned at an outer circumference portion of an area where the MEA is positioned, for sealing a space between the first and second separators and for covering an open area of a channel extension area of at least one of the first and second separators where the manifold communicates with the channel.
摘要:
A process of manufacturing a positive active material for a lithium secondary battery includes adding a metal source to a doping element-containing coating liquid to surface-treat the metal source, wherein the metal source is selected from the group consisting of cobalt, manganese, nickel, and combination thereof; drying the surface-treated metal source material to prepare a positive active material precursor; mixing the positive active material precursor with a lithium source; and subjecting the mixture to heat-treatment. Alternatively, the above drying step during preparation of the positive active material precursor is substituted by preheat-treatment or drying followed by preheat-treatment.