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公开(公告)号：US20200161646A1
公开(公告)日：2020-05-21
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
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.
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公开(公告)号：US20190190083A1
公开(公告)日：2019-06-20
申请号：US16219710
申请日：2018-12-13
Applicant: FDK CORPORATION
Inventor： Yuzo Imoto , Yuya Tanimoto , Tetsuya Yamane , Masaru Kihara
CPC classification number: H01M10/345 , H01M2/022 , H01M2/0285 , H01M4/383 , H01M4/52 , H01M2004/021 , H01M2004/028 , H01M2300/0014
Abstract: A nickel hydrogen secondary battery 2 has an outer can 10, and an electrode group 22 accommodated together with an alkali electrolyte solution in the outer can 10. The electrode group 22 includes a positive electrode 24 and a negative electrode 26 stacked through a separator 28. The positive electrode 24 includes a first positive electrode active substance and a second positive electrode active substance. These first and second positive electrode active substances each contain nickel hydroxide as a main component, and the first positive electrode active substance and the second positive electrode active substance differ in the amount of magnesium solid-dissolved.
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公开(公告)号：US12021223B2
公开(公告)日：2024-06-25
申请号：US17275297
申请日：2019-08-15
Applicant: FDK CORPORATION
Inventor： Tetsuya Yamane , Yuzo Imoto , Yuya Tanimoto , Masaru Kihara , Hideyuki Asanuma
CPC classification number: H01M4/32 , H01M4/62 , H01M10/30 , H01M2004/028
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 and a positive electrode additive, the positive electrode additive includes a titanium oxide particle having an anatase-type crystal structure, the titanium oxide particle has an average primary particle size of 5 nm or more and 10 nm or less and a BET specific surface area of 230 m2/g or more and 360 m2/g or less, and includes 0.1% by mass or more of niobium, and a rate of addition of the titanium oxide relative to the nickel hydroxide is 0.1% by mass or more and 1.0% by mass or less.
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公开(公告)号：US20210305559A1
公开(公告)日：2021-09-30
申请号：US17204714
申请日：2021-03-17
Applicant: FDK CORPORATION
Inventor： Yuya Tanimoto , Jun Ishida , Tetsuya Yamane , Yuzo Imoto
Abstract: A battery includes an outer can, and an electrode group that is accommodated in the outer can together with an alkaline electrolyte solution, in which the electrode group includes a positive electrode and a negative electrode superposed with a separator being interposed therebetween, the positive electrode includes a positive electrode core and a positive electrode mixture packed in the positive electrode core, the positive electrode mixture includes a nickel hydroxide powder that is an aggregate of a particle of nickel hydroxide as a positive electrode active material, and a conductive material, the conductive material is a high-valent cobalt compound provided with a high valence and having a valence of higher than three, the high-valent cobalt compound containing sodium, and the conductive material is in an amount of 0.5 parts by mass or more and 5.0 parts by mass or less based on 100 parts by mass of the positive electrode active material.
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公开(公告)号：US20180358609A1
公开(公告)日：2018-12-13
申请号：US16001644
申请日：2018-06-06
Applicant: FDK CORPORATION
Inventor： Tetsuya Yamane , Yuya Tanimoto , Yuzo Imoto , Hideyuki Asanuma
Abstract: A nickel hydride secondary battery includes an electrode group including a separator, a positive electrode and a negative electrode. The positive electrode includes a positive electrode body including a positive electrode core member and a positive electrode mixture that is filled in the positive electrode core member, and a surface layer existing on a surface part of the positive electrode body. The positive electrode mixture contains nickel hydroxide as a positive electrode active material, and the surface layer contains nickel.
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Patent Agency Ranking
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
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.
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公开(公告)号：US20170141401A1
公开(公告)日：2017-05-18
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
CPC classification number: H01M4/626 , H01M4/32 , H01M4/364 , H01M4/366 , H01M4/52 , H01M10/30 , H01M10/345 , H01M2004/028
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.
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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
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.
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9.发明公开公开(公告)号：US20230411622A1
公开(公告)日：2023-12-21
申请号：US18337343
申请日：2023-06-19
Applicant: FDK CORPORATION
Inventor： Yuya Tanimoto , Jun Ishida , Yuzo Imoto , Yuki Ehara
CPC classification number: H01M4/62 , H01M10/30 , H01M4/366 , H01M4/52 , H01M2004/028
Abstract: A positive electrode for an alkaline secondary battery has high discharge capacity in a low temperature environment. The positive electrode included in the alkaline secondary battery has a positive electrode active material including 100 parts by mass of nickel hydroxide, and an additive including yttrium oxide. The nickel hydroxide includes an α-phase single phase.
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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.
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