公开(公告)号：US11799089B2

公开(公告)日：2023-10-24

申请号：US17571662

申请日：2022-01-10

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： So Young Lee ,  Seung Ju Lee ,  Jin Hyeon Choi ,  Jeawoo Jung ,  Hyoung-Juhn Kim ,  Sung Jong Yoo ,  Hee-Young Park ,  Bora Seo ,  Jin Young Kim ,  Jong Hyun Jang

IPC: H01M4/86 ,  H01M8/1004 ,  H01M4/90 ,  H01M4/92 ,  H01M8/1018 ,  H01M8/10

CPC classification number: H01M4/8663 ,  H01M4/8605 ,  H01M4/9041 ,  H01M4/9083 ,  H01M4/926 ,  H01M8/1004 ,  H01M8/1018 ,  H01M2008/1095 ,  H01M2300/0082

Abstract: The present disclosure relates to antioxidant for a polymer electrolyte membrane fuel cell electrode catalyst, which includes cerium hydrogen phosphate (HCe2(PO4)3(H2O)) in the form of a nanofiber, and an electrode and a membrane-electrode assembly including the same. The electrode for a polymer electrolyte membrane fuel cell of the present disclosure, wherein the antioxidant is dispersed, can improve the mechanical strength of an electrode catalyst layer and can minimize deterioration of chemical durability even after long-term operation. And, a fuel cell including the same can exhibit high output performance and can operate stably even after long-term operation.

公开(公告)号：US12227858B2

公开(公告)日：2025-02-18

申请号：US17589466

申请日：2022-01-31

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Hyoung-Juhn Kim ,  Taekyung Lee ,  So Young Lee ,  Hee-Young Park ,  Bora Seo ,  Hyun Seo Park ,  Jong Hyun Jang ,  Tae Hoon Lim

IPC: C25B13/08 ,  C25B1/04

Abstract: The present disclosure relates to a polybenzimidazole-based electrolyte membrane for alkaline water electrolysis, which includes a polybenzimidazole-based polymer, wherein the polybenzimidazole-based polymer is a biaxially oriented film. The polybenzimidazole-based electrolyte membrane for alkaline water electrolysis can reduce the concentration of an alkaline solution by improving the crystallinity of a polybenzimidazole-based polymer to increase the resistance against base, significantly improving the long-term stability of alkaline water electrolysis using a polybenzimidazole-based electrolyte membrane through the improved resistance against base, and by increasing the operation temperature to enhance the catalyst activity.

公开(公告)号：US11670791B2

公开(公告)日：2023-06-06

申请号：US17097658

申请日：2020-11-13

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Hyoung-Juhn Kim ,  Jieun Choi ,  So Young Lee ,  Hee-Young Park ,  Sung Jong Yoo ,  Hyun Seo Park ,  Jing Young Kim ,  Jong Hyun Jang ,  Bora Seo

IPC: H01M8/1032 ,  C08G65/40 ,  H01M8/1027 ,  H01M8/1004 ,  H01M8/10

CPC classification number: H01M8/1032 ,  C08G65/40 ,  H01M8/1004 ,  H01M8/1027 ,  H01M2008/1095 ,  H01M2300/0082

Abstract: The present disclosure relates to a polyarylene ether-based polymer for an electrolyte membrane of a fuel cell, represented by the following Chemical Formula 1. When the polyarylene ether-based polymer for an electrolyte membrane of a fuel cell is applied to the manufacture of a membrane-electrode assembly through a decal process, the hot pressing temperature may be controlled to about 120° C. so as to conform to a low glass transition temperature. Therefore, it is possible to solve the problems of deterioration of an electrolyte membrane or incomplete transfer of an electrode catalyst layer, caused by the high hot pressing temperature applied in the case of the conventional hydrocarbon-based polymer material.