Jntg Co., Ltd.

Coupang, Corporation

Jntc Co., Ltd.

Tae Nyun Kim

Jy Young Jyoung

Eun Sook Lee

Eun Chong Kim

Do Hun Kim

Tae Hyung Kim

Na Hee Kang

Tae Hyun Kim

Sang Seok Lee

Yul Hee Lee

Sang Jin Choi

Young Soo Lim

Bo Ra Moon

Sang Wook Jang

Jeong Ho Pi

Yoo Cheol Na

Jung Kyu Lee

Min Jee Yang

Jung Mi Gwak

Tae Hyong Kim

Disclosed are a carbon substrate for a gas diffusion layer of a fuel cell, a gas diffusion layer employing the same, an electrode for a fuel cell, a membrane electrode assembly for a fuel cell, and a fuel cell, wherein the carbon substrate includes a plate-shaped substrate having an upper surface and a lower surface opposite the upper surface, and the plate-shaped substrate includes carbon fibers arranged to extend in one direction (extend unidirectionally) and a carbide of an organic polymer located between the carbon fibers to bind the carbon fibers to each other. Since the carbon substrate according to the present disclosure includes carbon fibers aligned in at least one direction selected from a machine direction (MD) and a cross-machine direction (CMD) by controlling the alignment of carbon fibers, the carbon substrate has excellent mechanical strength, particularly, bending strength, even if its thickness is thin, and thus it is possible to effectively prevent the intrusion phenomenon of the gas diffusion layer into the flow path of the metal separator, and has excellent gas flow characteristics.

Carbon substrate comprising carbon fibers unidirectionally aligned, and gas diffusion layer employing same

A carbon substrate for a gas diffusion layer of a fuel cell, the carbon substrate being a porous carbon substrate having a first surface and a second surface opposite the first surface, the carbon substrate includes a plurality of carbon fibers arranged irregularly to form a non-woven type and a carbide of an organic polymer located between the carbon fibers to bind the carbon fibers to each other, the carbide has a graphite structure, and the carbon substrate has a Bragg diffraction angle 2θ of less than 26.435° and a interplanar distance d(002) of less than 3.372 Å, a gas diffusion layer employing the same, an electrode for a fuel cell, a membrane electrode assembly for a fuel cell, and a fuel cell. When the gas diffusion layer is manufactured using the carbon substrate according to the present disclosure, cell voltage characteristics of the fuel cell may be greatly improved.

Graphitized carbon substrate and gas diffusion layer employing same

Provided is a delivery status management method performed by an electronic apparatus. The delivery status management method includes transmitting information associated with an item to a courier terminal, receiving information associated with a delivery progress status of the item from the courier terminal, and, when the information associated with the delivery progress status corresponds to a first type, performing a refund procedure for the item. According to the present disclosure, it is possible to provide a delivery status management method by which a refund caused by interruption of a delivery is not delayed and a refund procedure is performed quickly to a customer upon the interruption of the delivery.

Delivery status management method and electronic apparatus performing the same

Provided is a carbon substrate for a gas diffusion layer of a fuel cell. The carbon substrate has a structure, in which a plurality of unit carbon substrates are stacked. Each of the unit carbon substrates is a plate type substrate having a first surface and a second surface opposite to the first surface. Carbon fibers are randomly arranged on the first surface of the each unit carbon substrate. The number of the carbon fibers arranged in a machine direction of the unit carbon substrate is greater than the number of carbon fibers arranged in a transverse direction of the unit carbon substrate from the first surface to the second surface along a thickness direction of the unit carbon substrate; and, accordingly, an orientation gradient, in which the orientation in the machine direction increases from the first surface to the second surface, is shown.

Multi-layered carbon substrate for gas diffusion layer

A carbon substrate for a gas diffusion layer that has a porosity gradient in a thickness direction thereof, a gas diffusion using the carbon substrate, an electrode and a membrane-electrode assembly for a fuel cell that include the gas diffusion layer, and a fuel cell including the membrane-electrode assembly having the gas diffusion layer are provided. The gas diffusion layer has improved water discharge ability and improved bending strength both in the machine direction and cross-machine direction.

Carbon substrate for gas diffusion layer, gas diffusion layer using the same, and electrode for fuel cell, membrane-electrode assembly and fuel cell comprising the gas diffusion layer

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Seoul, South Korea

Tae Nyun Kim