公开(公告)号：US10693194B2

公开(公告)日：2020-06-23

申请号：US15317106

申请日：2015-06-23

Applicant: FDK CORPORATION

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

IPC: H01M4/24 ,  H01M4/38 ,  H01M4/46 ,  H01M4/52 ,  H01M10/26 ,  H01M10/30 ,  H01M4/62 ,  H01M10/34

Abstract: A nickel hydrogen secondary battery accommodates an electrode group including a positive electrode and a negative electrode which are stacked one on top of another through a separator, together with an alkaline electrolyte. The battery contains Li, with a total amount of Li in the battery 2 of 15 to 50 mg/Ah, as determined as the mass in terms of LiOH per Ah of the positive electrode capacity. The negative electrode includes particles of rare earth-Mg—Ni-based hydrogen storage alloy which contains a rare earth element, Mg and Ni. The hydrogen storage alloy particles 44 includes, on the surface thereof, a rare earth hydroxide which is the hydroxide of a rare earth element and has a specific surface area of 0.1 to 0.5 m2/g.

公开(公告)号：US20170237065A1

公开(公告)日：2017-08-17

申请号：US15425816

申请日：2017-02-06

Applicant: FDK CORPORATION ,  FUJITSU LIMITED

Inventor： Takeshi Ito ,  Yuzo Imoto ,  Masaru Kihara ,  Takayuki Yano ,  Shigekazu Yasuoka ,  Shuuichi Doi ,  Takashi Yamazaki ,  Yuji Kataoka

IPC: H01M4/36 ,  H01M4/50 ,  H01M10/34 ,  H01M4/52

CPC classification number: H01M4/366 ,  C01G51/04 ,  C01G53/04 ,  C01P2002/50 ,  C01P2002/52 ,  C01P2004/80 ,  H01M4/32 ,  H01M4/50 ,  H01M4/52 ,  H01M10/30 ,  H01M10/345 ,  H01M2004/028 ,  H01M2300/0014

Abstract: A nickel-hydrogen secondary battery includes an electrode group comprising a separator, a positive electrode, and a negative electrode, and the positive electrode contains a positive electrode active material including a base particle comprising a nickel hydroxide particle containing Mn in solid solution and a conductive layer comprising a Co compound and covering the surface of the base particle, wherein the X-ray absorption edge energy of Mn detected within 6500 to 6600 eV by measurement with an XAFS method is 6548 eV or higher.

公开(公告)号：US12021222B2

公开(公告)日：2024-06-25

申请号：US17274772

申请日：2019-08-15

Applicant: FDK CORPORATION

Inventor： Yuya Tanimoto ,  Yuzo Imoto ,  Tetsuya Yamane ,  Masaru Kihara ,  Hideyuki Asanuma

IPC: H01M4/32 ,  H01M4/36 ,  H01M4/38 ,  H01M4/52 ,  H01M4/62 ,  H01M10/30

CPC classification number: H01M4/32 ,  H01M4/366 ,  H01M4/383 ,  H01M4/52 ,  H01M4/62 ,  H01M10/30

Abstract: A battery 2 includes an outer can 10 and an electrode group 22 that is housed in the outer can 10 together with an alkaline electrolytic solution, in which a positive electrode 24 included in the electrode group 22 includes a positive electrode substrate and a positive electrode mixture supported on the positive electrode substrate, the positive electrode mixture includes nickel hydroxide, yttrium oxide serving as a first additive, and niobium oxide or titanium oxide serving as a second additive, a total amount of the first additive and the second additive is 0.1 parts by mass or more and 2.5 parts by mass or less per 100 parts by mass of the nickel hydroxide, a mass ratio of the first additive and the second additive is in a relationship of 1:0.2 to 5, and the positive electrode mixture after an activation treatment has a resistivity of 1 Ω·m or more and 10 Ω·m or less.

公开(公告)号：US11228027B2

公开(公告)日：2022-01-18

申请号：US16773367

申请日：2020-01-27

Applicant: FDK CORPORATION ,  FUJITSU LIMITED

Inventor： Takeshi Ito ,  Yuzo Imoto ,  Masaru Kihara ,  Takayuki Yano ,  Shigekazu Yasuoka ,  Shuuichi Doi ,  Takashi Yamazaki ,  Yuji Kataoka

IPC: H01M4/36 ,  H01M4/52 ,  H01M4/32 ,  C01G53/04 ,  C01G51/04 ,  H01M4/50 ,  H01M10/34 ,  H01M10/30 ,  H01M4/02

Abstract: A nickel-hydrogen secondary battery includes an electrode group comprising a separator, a positive electrode, and a negative electrode, and the positive electrode contains a positive electrode active material including a base particle comprising a nickel hydroxide particle containing Mn in solid solution and a conductive layer comprising a Co compound and covering the surface of the base particle, wherein the X-ray absorption edge energy of Mn detected within 6500 to 6600 eV by measurement with an XAFS method is 6548 eV or higher.

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.