Jntg Co., Ltd.

Jong Sik Ryu

Eun Sook Lee

Jy Young Jyoung

Na Hee Kang

Jae Young Choi

Do Hun Kim

Eun Chong Kim

Ki Cheol Ahn

Provided is a gas diffusion layer, in which a microporous layer has an inner wall of through passages and a region adjacent to the through passages containing a greater amount of a water-repellent binder resin than a region not adjacent to the through passages, and thus water formed by an electrochemical reaction is effectively discharged from the gas diffusion layer. When the gas diffusion layer of the present invention is used, an optimal water management may be possible for smooth operation under all humidity conditions including a high humidity condition and a low humidity condition, and thus a fuel cell having improved cell performance may be obtained.

Gas diffusion layer including microporous layer having through passages and/or concentration gradient of water-repellent resin in thickness direction, and fuel cell including the same

Provided a gas diffusion layer for fuel cells, the gas diffusion layer including: a carbon substrate; and a microporous layer formed on the carbon substrate, wherein the microporous layer comprises first carbon particles having a partially graphitized structure and a water-repellent binder resin binding the first carbon particles, and the microporous layer further comprises a cerium compound, a nitrogen-doped cerium compound, nitrogen-doped second carbon particles having a partially graphitized or non-graphitized structure, or a mixture of two or more, as a radical scavenger capable of removing hydrogen peroxide generated at a fuel cell open circuit potential or a higher potential. In the membrane electrode assembly and the fuel cell each employing the gas diffusion layer having excellent durability according to one or more embodiments, chemical or electrochemical degradation may be effectively prevented over a long period of time, and thus excellent electrochemical performance may be obtained over a long period of time. This leads to an extended lifetime of the fuel cell.

Gas diffusion layer comprising microporous layer including carbon having partially graphitized structure and radical scavenger additive, and fuel cell employing the same

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Gyeonggi-do, South Korea

Jong Sik Ryu