公开(公告)号：US11695147B2

公开(公告)日：2023-07-04

申请号：US17013918

申请日：2020-09-08

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

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

IPC: H01M8/1051 ,  H01M8/1039 ,  C08K3/32 ,  C08K7/08 ,  C08F14/18 ,  H01M8/10

CPC classification number: H01M8/1051 ,  C08F14/185 ,  C08K3/32 ,  C08K7/08 ,  H01M8/1039 ,  C08K2003/328 ,  C08K2201/003 ,  C08K2201/011 ,  H01M2008/1095 ,  H01M2300/0082

Abstract: Disclosed is an antioxidant for a polymer electrolyte membrane of a fuel cell including cerium hydrogen phosphate (CeHPO4). The presence of cerium hydrogen phosphate in the antioxidant enhances the dissolution stability of cerium and improves the ability to capture water, leading to an increase in proton conductivity. In addition, the cerium hydrogen phosphate has a crystal structure composed of smaller cerium particles. This crystal structure greatly improves the ability of the antioxidant to prevent oxidation of the electrolyte membrane. Also disclosed are an electrolyte membrane including the antioxidant, a fuel cell including the electrolyte membrane, a method for preparing the antioxidant, a method for producing the electrolyte membrane, and a method for fabricating the fuel cell.

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：US11569523B2

公开(公告)日：2023-01-31

申请号：US16859712

申请日：2020-04-27

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： So Young Lee ,  Seung Ju Lee ,  Min Jae Lee ,  Hyun Seo Park ,  Jong Hyun Jang ,  Hyoung-Juhn Kim ,  Suk Woo Nam ,  Young Suk Jo ,  Yeong Cheon Kim

IPC: H01M8/1051 ,  H01M8/103 ,  H01M8/1072 ,  H01M8/1081 ,  H01M8/1048 ,  H01M8/1088 ,  H01M8/1011 ,  H01M8/10 ,  H01M8/1009

Abstract: The present disclosure relates to a polymer electrolyte membrane for medium and high temperature, a preparation method thereof and a high-temperature polymer electrolyte membrane fuel cell including the same, more particularly to a technology of preparing a composite membrane including an inorganic phosphate nanofiber incorporated into a phosphoric acid-doped polybenzimidazole (PBI) polymer membrane by adding an inorganic precursor capable of forming a nanofiber in a phosphoric acid solution when preparing phosphoric acid-doped polybenzimidazole and using the same as a high-temperature polymer electrolyte membrane which is thermally stable even at high temperatures of 200-300° C. without degradation of phosphoric acid and has high ion conductivity.