Abstract: Disclosed are a catalyst complex and a method of manufacturing the same. The catalyst complex may be manufactured by uniformly depositing metal catalyst particles on pretreated support particles through an atomic layer deposition process using a fluidized-bed reactor, which may be then uniformly dispersed throughout the ionomer solution. As such, manufacturing costs may be reduced due to the use of a small amount of metal catalyst particles and the durability of an electrolyte membrane and OCV may increase. Further disclosed are a method of manufacturing the catalyst complex, an electrolyte membrane including the catalyst complex, and a method of manufacturing the electrolyte membrane.

Abstract: Disclosed are a catalyst complex and a method of manufacturing the same. The catalyst complex may be manufactured by uniformly depositing metal catalyst particles on pretreated support particles through an atomic layer deposition process using a fluidized-bed reactor, which may be then uniformly dispersed throughout the ionomer solution. As such, manufacturing costs may be reduced due to the use of a small amount of metal catalyst particles and the durability of an electrolyte membrane and OCV may increase. Further disclosed are a method of manufacturing the catalyst complex, an electrolyte membrane including the catalyst complex, and a method of manufacturing the electrolyte membrane.

Abstract: According to an embodiment of the present inventive concept, an electrolyte additive represented by the compounds of Chemical Formulas 1 to 4 may be provided. In addition, according to another embodiment of the present inventive concept, a method for preparing an electrolyte additive of the compounds of Chemical Formulas 1 to 4 may be provided, wherein the method for preparing the electrolyte additive includes reacting hexafluorophosphate and 2-monofluoromalonic acid, further adding an HF scavenger to the mixed solution produced by the reaction, and concentrating and drying the reaction solution obtained therefrom.

Abstract: A porous body for a fuel cell is interposed between a membrane-electrode assembly (MEA) and a bipolar plate to form a gas channel through which a reactant gas flows in a predetermined direction, the porous body including: a main body disposed to contact the bipolar plate; and a plurality of ribs each including a land portion disposed to contact the MEA and a connecting portion connecting the land portion to the main body, in which an area of the land portion is gradually narrowed from an upstream part to a downstream part of the gas channel.

Abstract: Disclosed are a catalyst complex and a method of manufacturing the same. The catalyst complex may be manufactured by uniformly depositing metal catalyst particles on pretreated support particles through an atomic layer deposition process using a fluidized-bed reactor, which may be then uniformly dispersed throughout the ionomer solution. As such, manufacturing costs may be reduced due to the use of a small amount of metal catalyst particles and the durability of an electrolyte membrane and OCV may increase. Further disclosed are a method of manufacturing the catalyst complex, an electrolyte membrane including the catalyst complex, and a method of manufacturing the electrolyte membrane.

Abstract: Provided are method for producing alkali metal hexafluorophosphate, alkali metal hexafluorophosphate powder, method for producing electrolyte concentrate comprising alkali metal hexafluorophosphate, and method for producing secondary battery. The method for preparing alkali metal hexafluorophosphate includes a step of obtaining an alkali metal hexafluorophosphate by reacting phosphorus pentafluoride with alkali metal fluoride in a haloformate solvent.

Abstract: A porous body for a fuel cell is interposed between a membrane-electrode assembly (MEA) and a bipolar plate to form a gas channel through which a reactant gas flows in a predetermined direction, the porous body including: a main body disposed to contact the bipolar plate; and a plurality of ribs each including a land portion disposed to contact the MEA and a connecting portion connecting the land portion to the main body, in which an area of the land portion is gradually narrowed from an upstream part to a downstream part of the gas channel.

Abstract: A porous body for a fuel cell is interposed between a membrane-electrode assembly (MEA) and a bipolar plate to form a gas channel through which a reactant gas flows in a predetermined direction, the porous body including: a main body disposed to contact the bipolar plate; and a plurality of ribs each including a land portion disposed to contact the MEA and a connecting portion connecting the land portion to the main body, in which an area of the land portion is gradually narrowed from an upstream part to a downstream part of the gas channel.

Abstract: A porous body for a fuel cell is interposed between a membrane-electrode assembly (MEA) and a bipolar plate to form a gas channel through which a reactant gas flows in a predetermined direction, the porous body including: a main body disposed to contact the bipolar plate; and a plurality of ribs each including a land portion disposed to contact the MEA and a connecting portion connecting the land portion to the main body, in which an area of the land portion is gradually narrowed from an upstream part to a downstream part of the gas channel.

Abstract: A self-piercing rivet which reduces damage of a composite part and enhances bonding capability by suppressing galvanic corrosion is provided. The self-piercing rivet includes a repair resin that is disposed in a space formed within the rivet and a passage that is formed between an inner surface forming the space and an outer surface of the rivet and through which the repair resin flows.

Abstract: Provided is a method of manufacturing vinylethylene carbonate. The method includes synthesizing vinylethylene carbonate (VEC) by reaction of 3,4-dihydroxy-1-butene (3,4-DHB) and dialkyl carbonate using a base catalyst, and refining the VEC.

Abstract: The method of producing 4-fluoroethylene carbonate (FEC), in which ethylene carbonate (EC) reacts with a mixture of fluorine and nitrogen gases, includes feeding a mixture gas of fluorine gas and nitrogen gas into a reactor having ethylene carbonate charged therein, so as to react the ethylene carbonate with the mixture gas of the fluorine gas and the nitrogen gas. The mixture gas fed in the reactor is regulated to have a desired bubble size while passing through a gas bubble regulating column, in which a packing for a packed column is packed. In the method, EC directly reacts with F2/N2 mixture gas to produce FEC, thus a purification process is simple and it is possible to produce FEC at high conversion efficiency and selectivity.

Abstract: A method of preparing lithium hexafluoro phosphate (LiPF6) using phosphorous pentachloride (PCl5), lithium chloride (LiCl), and hydrogen fluoride (HF) as raw materials. The method includes the steps of: (a) reacting the phosphorous pentafluoride with the hydrogen fluoride to prepare phosphorous pentafluoride (PF5), and (b) reacting the phosphorous pentafluoride with the lithium chloride in a hydrogen fluoride to prepare the lithium hexafluoro phosphate. Also, in this method, anhydrous hydrogen fluoride, from which moisture was removed by treating with F2 gas, is used in the steps (a) and (b), and the step (b) further comprises contacting the reaction system of the step (b) with F2 gas. Accordingly, as the method adopts relatively cheap raw materials, such as PCl5, LiCl and the like, while a highly pure F2 obtained by an electrolysis is used in the reaction system, it has an advantage in that it enables lithium hexafluoro phosphate (LiPF6) to be prepared at a high yield and purity.