公开(公告)号：US10727514B2

公开(公告)日：2020-07-28

申请号：US16495637

申请日：2018-03-22

Applicant: SHOWA DENKO K.K.

Inventor： Takuya Imai ,  Kazuo Furuya ,  Kunchan Lee

IPC: H01M4/92 ,  H01M8/1004 ,  B01J27/043 ,  H01M4/90 ,  H01M8/1018

Abstract: Provided are an oxygen reduction catalyst having a high electrode potential under a fuel cell operating environment, an electrode containing the oxygen reduction catalyst, a membrane electrode assembly in which a cathode is the electrode, and a fuel cell including the membrane electrode assembly. The oxygen reduction catalyst used here contains cobalt, sulfur, and oxygen as elements, has a CoS2 cubic structure in powder X-ray diffractometry, and having an S—Co/S—O peak area ratio of 6 to 15 in an S2p spectrum in X-ray photoelectron spectroscopic analysis.

公开(公告)号：US10720649B2

公开(公告)日：2020-07-21

申请号：US16495635

申请日：2018-03-22

Applicant: SHOWA DENKO K.K.

Inventor： Takuya Imai ,  Kazuo Furuya ,  Kunchan Lee

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

Abstract: Provided are an oxygen reduction catalyst having a high electrode potential under a fuel cell operating environment, an electrode containing the oxygen reduction catalyst, a membrane electrode assembly in which a cathode is the electrode, and a fuel cell including the membrane electrode assembly. The oxygen reduction catalyst used here contains cobalt, sulfur, and oxygen as elements, has a CoS hexagonal structure in powder X-ray diffractometry, and having an S—Co/S—O peak area ratio of 2.1 to 8.9 in an S2p spectrum in X-ray photoelectron spectroscopic analysis.