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.

公开(公告)号：US20180248172A1

公开(公告)日：2018-08-30

申请号：US15549144

申请日：2016-02-24

Applicant: FDK CORPORATION

Inventor： Masaru Kihara ,  Akira Saguchi ,  Yusuke Shingai ,  Jun Ishida ,  Takuya Kai ,  Takeshi Kajiwara

IPC: H01M4/32 ,  H01M10/34 ,  H01M4/46

Abstract: A nickel hydrogen secondary battery comprises an outer can and an electrode group accommodated in a hermetically sealed state together with an alkaline electrolyte solution in the outer can, wherein the electrode group comprises a positive electrode and a negative electrode stacked through a separator, wherein the negative electrode contains a hydrogen absorbing alloy powder that is an aggregate of particles of a hydrogen absorbing alloy, wherein the hydrogen absorbing alloy powder is such that when an average particle size of the particles is represented by M; a particle size of ½ of the M is represented by P; and a particle size of ⅓ of the M is represented by Q, a content of the particles having a particle size equal to or smaller than the P is lower than 20% by mass of the whole of the hydrogen absorbing alloy powder; and the content of the particles having a particle size equal to or smaller than the Q is lower than 10% by mass of the whole of the hydrogen absorbing alloy powder.