公开(公告)号：US10177385B2

公开(公告)日：2019-01-08

申请号：US15349933

申请日：2016-11-11

Applicant: FDK CORPORATION ,  FUJITSU LIMITED

Inventor： Yuzo Imoto ,  Takeshi Ito ,  Shigekazu Yasuoka ,  Shuuichi Doi ,  Takashi Yamazaki ,  Yuji Kataoka

IPC: H01M4/131 ,  H01M4/62 ,  H01M4/36 ,  H01M4/52 ,  H01M10/30 ,  H01M4/32 ,  H01M4/02 ,  H01M10/34

Abstract: A nickel-hydrogen secondary battery includes an electrode group including a separator, a positive electrode and a negative electrode, the positive electrode includes a positive electrode active material, the positive electrode active material includes a composite particle including a compound of Co and a compound of Ni, and the ratio R represented by A/B satisfies a relationship of R≥0.3, when the amount of jumping in the X-ray absorption fine structure spectrum of the Co in 7600 to 7800 eV and the amount of jumping in the X-ray absorption fine structure spectrum of the Ni in 8300 to 8500 eV obtained by measurement according to a conversion electron yield method are defined as A and B, respectively.

公开(公告)号：US20170237066A1

公开(公告)日：2017-08-17

申请号：US15433931

申请日：2017-02-15

Applicant: FDK CORPORATION ,  FUJITSU LIMITED

Inventor： Yuzo Imoto ,  Takeshi Ito ,  Shuuichi Doi ,  Takashi Yamazaki ,  Yuji Kataoka

IPC: H01M4/36 ,  H01M4/525 ,  H01M10/30 ,  H01M4/52

CPC classification number: H01M4/366 ,  H01M4/32 ,  H01M4/52 ,  H01M4/525 ,  H01M10/30 ,  H01M2004/028

Abstract: A nickel-hydrogen secondary battery includes an electrode group including a separator, a positive electrode, and a negative electrode, and the positive electrode includes a positive electrode active material particle including a base particle and a surface layer covering the surface of the base particle, and the base particle contains nickel hydroxide, and the surface layer contains a trivalent or higher-valent cobalt compound and Co3O4.