公开(公告)号：US12034188B2

公开(公告)日：2024-07-09

申请号：US17416986

申请日：2019-12-03

申请人： JNTG Co., Ltd.

发明人： Eun Sook Lee ,  Jy Young Jyoung ,  Na Hee Kang ,  Do Hun Kim ,  Tae Hyung Kim ,  Eun Chong Kim ,  Tae Nyun Kim

IPC分类号： H01M8/04 ,  H01M8/0234 ,  H01M8/0245 ,  H01M8/1004

CPC分类号： H01M8/0234 ,  H01M8/0245 ,  H01M8/1004

摘要： 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.

公开(公告)号：US11799090B2

公开(公告)日：2023-10-24

申请号：US17564481

申请日：2021-12-29

申请人： JNTG Co., LTD.

发明人： Eun Sook Lee ,  Jy Young Jyoung ,  Na Hee Kang ,  Eun Chong Kim ,  Jong Sik Ryu ,  Ki Cheol Ahn ,  Jae Young Choi

IPC分类号： H01M4/88 ,  H01M4/86 ,  H01M8/0234 ,  H01M8/0245 ,  H01M8/1004

CPC分类号： H01M4/8807 ,  H01M4/8657 ,  H01M8/0234 ,  H01M8/0245 ,  H01M8/1004

摘要： 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.

公开(公告)号：US20220209270A1

公开(公告)日：2022-06-30

申请号：US17559722

申请日：2021-12-22

申请人： JNTG Co., LTD.

发明人： Eun Sook Lee ,  Jy Young Jyoung ,  Na Hee Kang ,  Do Hun Kim ,  Jong Sik Ryu

IPC分类号： H01M8/1004

摘要： 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.

公开(公告)号：US20220077476A1

公开(公告)日：2022-03-10

申请号：US17416986

申请日：2019-12-03

申请人： JNTG Co., Ltd.

发明人： Eun Sook Lee ,  Jy Young Jyoung ,  Na Hee Kang ,  Do Hun Kim ,  Tae Hyung Kim ,  Eun Chong Kim ,  Tae Nyun Kim

IPC分类号： H01M8/0234 ,  H01M8/1004 ,  H01M8/0245

摘要： 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.

公开(公告)号：US20220021007A1

公开(公告)日：2022-01-20

申请号：US17311625

申请日：2019-12-02

申请人： JNTG Co., Ltd.

发明人： Eun Sook Lee ,  Jy Young Jyoung ,  Na Hee Kang ,  Do Hun Kim ,  Tae Hyung Kim ,  Eun Chong Kim ,  Tae Nyun Kim

IPC分类号： H01M8/0234 ,  H01M4/86 ,  H01M8/0245 ,  H01M8/1004

摘要： 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.

公开(公告)号：US12040516B2

公开(公告)日：2024-07-16

申请号：US17559722

申请日：2021-12-22

申请人： JNTG Co., LTD.

发明人： Eun Sook Lee ,  Jy Young Jyoung ,  Na Hee Kang ,  Do Hun Kim ,  Jong Sik Ryu

IPC分类号： H01M8/1004

CPC分类号： H01M8/1004

摘要： 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.

公开(公告)号：US12034187B2

公开(公告)日：2024-07-09

申请号：US17311625

申请日：2019-12-02

申请人： JNTG Co., Ltd.

发明人： Eun Sook Lee ,  Jy Young Jyoung ,  Na Hee Kang ,  Do Hun Kim ,  Tae Hyung Kim ,  Eun Chong Kim ,  Tae Nyun Kim

IPC分类号： H01M4/00 ,  H01M4/86 ,  H01M8/0234 ,  H01M8/0245 ,  H01M8/1004

CPC分类号： H01M8/0234 ,  H01M4/861 ,  H01M4/8647 ,  H01M8/0245 ,  H01M8/1004

摘要： 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.

公开(公告)号：US20220231304A1

公开(公告)日：2022-07-21

申请号：US17564481

申请日：2021-12-29

申请人： JNTG Co., LTD.

发明人： Eun Sook Lee ,  Jy Young Jyoung ,  Na Hee Kang ,  Eun Chong Kim ,  Jong Sik Ryu ,  Ki Cheol Ahn ,  Jae Young Choi

IPC分类号： H01M4/88 ,  H01M8/1004 ,  H01M8/0245 ,  H01M4/86 ,  H01M8/0234

摘要： 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.