Abstract: A buckle includes: a plug member including a shaft portion protruding to one end of a body, a locking jaw expanding from a front end of the shaft portion; and a first magnet embedded in the shaft portion; and a socket member including a coupling groove having an entrance formed at one side such that the shaft portion is inserted thereinto from one end of a body, an inclined guide surface formed at one side of the coupling groove, a second magnet embedded in the bottom surface of the coupling groove, and a locking portion formed on the inner circumference of the entrance of the opposite side to the inclined guide surface of the coupling groove to get in contact with the locking jaw when the shaft portion is inserted.

Abstract: Disclosed are a separator for fuel cells capable of minimizing the volume of a system and the use of sealants, and a stack for fuel cells, more particularly, a stack for solid oxide fuel cells, including the same. Specifically, by adding a metal sheet having a specific shape, position and size to the separator, the stress applied to the sealant can be uniformized, and thus the oxidizing agent and fuel can be separated and electrically isolated using only a piece of sealant. Therefore, the stack for fuel cells is characterized in that there is no variation in temperature, reactant concentration, power, or the like between respective unit cells, so delamination and microcracks do not occur, the volume is minimized, and the power density per unit volume is very high.

Abstract: Disclosed is a method of manufacturing a solid oxide fuel cell including a multi-layered electrolyte layer using a calendering process. The method for manufacturing a solid oxide fuel cell is a continuous process, thus providing high productivity and maximizing facility investment and processing costs. In addition, the solid oxide fuel cell manufactured by the method includes an anode that is free of interfacial defects and has a uniform packing structure, thereby advantageously greatly improving the production yield and power density. In addition, the solid oxide fuel cell has excellent interfacial bonding strength between respective layers included therein, and includes a multi-layered electrolyte layer in which the secondary phase at the interface is suppressed and which has increased density, thereby advantageously providing excellent output characteristics and long-term stability even at an intermediate operating temperature.

Abstract: A string stopper includes a fixing hole formed at an end, and a guide hole formed at one side of the fixing hole. A string is inserted into the fixing hole so that a fixed end of the string is fixed to the fixing hole, and a free end of the string is inserted into an entrance of the guide hole and is drawn out of an exit of the guide hole. The guide hole has a first narrow groove and a second narrow groove which are respectively formed at the inside of the entrance and at the outside of the exit of the guide hole.

Abstract: Disclosed herein is a buckle including a plug member and a socket member. The plug member includes a shaft part protruding from one side of a first body, a first magnet inserted into the shaft part, a connection recess formed on the outer face of the shaft part, and at least one guide protrusion formed on the inner wall of the connection recess. The socket member includes a connection protrusion formed on one side of a second body to be inserted into the connection recess, a coupling recess formed in the middle of the connection protrusion so that the shaft part is inserted into the coupling recess, a second magnet inserted into the coupling recess, and at least one guide groove formed in the outer surface of the connection protrusion to guide the guide protrusion.

Abstract: Disclosed is a method for analyzing a sulfide-based solid electrolyte using computer simulation including connecting, by a user, to a client accessible to a server, inputting information of a sulfide-based solid electrolyte to be analyzed to the client, transmitting, by the client, the information to the server, implementing, by the server, generation of a three-dimensional structure in which anion clusters and lithium ions are disposed, based on the transmitted information, feeding back, by the server, an implementation result to the client, and displaying, by the client, the feedback result. In addition, properties of sulfide-based solid electrolytes, which cannot be observed by experimentation, can be analyzed based on lithium, ion conductivity.

Abstract: Disclosed is an anode-free all-solid-state battery having improved charge/discharge cycle stability. Specifically, the anode-free all-solid-state battery includes a cathode layer containing a cathode active material, an anode current collector layer, and a solid electrolyte layer interposed between the cathode layer and the anode current collector layer, wherein the anode current collector layer has a surface roughness (Rq) of 100 nm to 1,000 nm.

Abstract: Disclosed is a method of manufacturing a solid oxide fuel cell using a calendering process. The method includes preparing a stack including an anode support layer (ASL) and an anode functional layer (AFL), calendering the stack to obtain an anode, stacking an electrolyte layer on the anode to obtain an assembly, calendering the assembly to obtain an electrolyte substrate, sintering the electrolyte substrate, and forming a cathode on the electrolyte layer of the electrolyte substrate.

Abstract: A string stopper includes a fixing hole formed at an end, and a guide hole formed at one side of the fixing hole. A string is inserted into the fixing hole so that a fixed end of the string is fixed to the fixing hole, and a free end of the string is inserted into an entrance of the guide hole and is drawn out of an exit of the guide hole. The guide hole has a first narrow groove and a second narrow groove which are respectively formed at the inside of the entrance and at the outside of the exit of the guide hole.

Abstract: Provided are a lithium-argyrodite ionic superconductor containing a halogen element and a method for preparing the same, wherein an argyrodite-type crystal structure can be maintained and lithium ion conductivity can be greatly improved by combining specific elements at a specific molar ratio.