公开(公告)号：US20200251746A1

公开(公告)日：2020-08-06

申请号：US16781192

申请日：2020-02-04

Applicant: FDK CORPORATION ,  JAPAN METALS AND CHEMICALS CO., LTD.

Inventor： Shohei Unoki ,  Takeshi Kajiwara ,  Takahiro Endo ,  Shigekazu Yasuoka ,  Yoshikatsu Watanabe

IPC: H01M4/90 ,  H01M12/08 ,  H01M4/38 ,  H01M4/02 ,  H01M4/86

Abstract: An air electrode catalyst for an air secondary battery includes a pyrochlore-type composite oxide having two or more crystal structures having a different amount of oxygen. A battery, according to some embodiments, includes an electrode group including an air electrode and a negative electrode stacked with a separator therebetween, and a container accommodating the electrode group along with an alkali electrolyte solution, wherein the air electrode includes the air electrode catalyst. The air electrode catalyst may have a pyrochlore-type composite oxide having a crystal structure represented by Bi2Ru2O6.92 and a crystal structure represented by Bi2Ru2O7.33.